Sample records for vacuum bulkhead a concept

  1. Design Study for the Asteroid Redirect Vehicle (ARV) Composite Primary Bulkhead

    NASA Technical Reports Server (NTRS)

    Cressman, Thomas O.; Paddock, David A.

    2017-01-01

    A design study was undertaken of a carbon fiber primary bulkhead for a large solar electric propulsion (SEP) spacecraft. The bulkhead design, supporting up to 16 t of xenon propellant, progressed from one consisting of many simple parts with many complex joints, to one consisting of a few complex parts with a few simple joints. The unique capabilities of composites led to a topology that transitioned loads from bending to in-plane tension and shear, with low part count. This significantly improved bulkhead manufacturability, cost, and mass. The stiffness-driven structure utilized high-modulus M55J fiber unidirectional prepregs. A full-scale engineering demonstration unit (EDU) of the concept was used to demonstrate manufacturability of the concept. Actual labor data was obtained, which could be extrapolated to a full bulkhead. The effort demonstrated the practicality of using high-modulus fiber (HMF) composites for unique shape topologies that minimize mass and cost. The lessons are applicable to primary and secondary aerospace structures that are stiffness driven.

  2. Mechanism Guides Hatch Through Hatchway

    NASA Technical Reports Server (NTRS)

    Barron, Daniel R.; Kennedy, Steven E.

    1993-01-01

    Elliptical hatch designed to move through hatchway to make pressure-assisted seal with either side of bulkhead. Compact three-degree-of-freedom mechanism guides hatch through hatchway or holds hatch off to one side to facilitate passage of crew and/or equipment. Hatches and mechanisms used in submarines, pressure chambers (including hyperbaric treatment chambers), vacuum chambers, and vacuum-or-pressure test chambers.

  3. Asymmetric Bulkheads for Cylindrical Pressure Vessels

    NASA Technical Reports Server (NTRS)

    Ford, Donald B.

    2007-01-01

    Asymmetric bulkheads are proposed for the ends of vertically oriented cylindrical pressure vessels. These bulkheads, which would feature both convex and concave contours, would offer advantages over purely convex, purely concave, and flat bulkheads (see figure). Intended originally to be applied to large tanks that hold propellant liquids for launching spacecraft, the asymmetric-bulkhead concept may also be attractive for terrestrial pressure vessels for which there are requirements to maximize volumetric and mass efficiencies. A description of the relative advantages and disadvantages of prior symmetric bulkhead configurations is prerequisite to understanding the advantages of the proposed asymmetric configuration: In order to obtain adequate strength, flat bulkheads must be made thicker, relative to concave and convex bulkheads; the difference in thickness is such that, other things being equal, pressure vessels with flat bulkheads must be made heavier than ones with concave or convex bulkheads. Convex bulkhead designs increase overall tank lengths, thereby necessitating additional supporting structure for keeping tanks vertical. Concave bulkhead configurations increase tank lengths and detract from volumetric efficiency, even though they do not necessitate additional supporting structure. The shape of a bulkhead affects the proportion of residual fluid in a tank that is, the portion of fluid that unavoidably remains in the tank during outflow and hence cannot be used. In this regard, a flat bulkhead is disadvantageous in two respects: (1) It lacks a single low point for optimum placement of an outlet and (2) a vortex that forms at the outlet during outflow prevents a relatively large amount of fluid from leaving the tank. A concave bulkhead also lacks a single low point for optimum placement of an outlet. Like purely concave and purely convex bulkhead configurations, the proposed asymmetric bulkhead configurations would be more mass-efficient than is the flat bulkhead configuration. In comparison with both purely convex and purely concave configurations, the proposed asymmetric configurations would offer greater volumetric efficiency. Relative to a purely convex bulkhead configuration, the corresponding asymmetric configuration would result in a shorter tank, thus demanding less supporting structure. An asymmetric configuration provides a low point for optimum location of a drain, and the convex shape at the drain location minimizes the amount of residual fluid.

  4. Portable fixture facilitates pressure testing of instrumentation fittings

    NASA Technical Reports Server (NTRS)

    Olson, G. A.

    1967-01-01

    Portable fixture facilitates pressure testing to detect possible leaks in instrumentation fittings mounted on tank bulkheads. It uses a vacuum cup which seals a pressure regulator adapter around one side of the fitting to be pressure tested. Leakage is detected with a gas sniffer.

  5. Hybrid Wing-Body Pressurized Fuselage and Bulkhead, Design and Optimization

    NASA Technical Reports Server (NTRS)

    Mukhopadhyay, Vivek

    2013-01-01

    The structural weight reduction of a pressurized Hybrid Wing-Body (HWB) fuselage is a serious challenge. Hence, research and development are presently being continued at NASA under the Environmentally Responsible Aviation (ERA) and Subsonic Fixed Wing (SFW) projects in collaboration with the Boeing Company, Huntington Beach and Air Force Research Laboratory (AFRL). In this paper, a structural analysis of the HWB fuselage and bulkhead panels is presented, with the objectives of design improvement and structural weight reduction. First, orthotropic plate theories for sizing, and equivalent plate analysis with appropriate simplification are considered. Then parametric finite-element analysis of a fuselage section and bulkhead are conducted using advanced stitched composite structural concepts, which are presently being developed at Boeing for pressurized HWB flight vehicles. With this advanced stiffened-shell design, structural weights are computed and compared to the thick sandwich, vaulted-ribbed-shell, and multi-bubble stiffened-shell structural concepts that had been studied previously. The analytical and numerical results are discussed to assess the overall weight/strength advantages.

  6. Spin Forming Aluminum Crew Module (CM) Metallic Aft Pressure Vessel Bulkhead (APVBH) - Phase II

    NASA Technical Reports Server (NTRS)

    Hoffman, Eric K.; Domack, Marcia S.; Torres, Pablo D.; McGill, Preston B.; Tayon, Wesley A.; Bennett, Jay E.; Murphy, Joseph T.

    2015-01-01

    The principal focus of this project was to assist the Multi-Purpose Crew Vehicle (MPCV) Program in developing a spin forming fabrication process for manufacture of the Orion crew module (CM) aft pressure vessel bulkhead. The spin forming process will enable a single piece aluminum (Al) alloy 2219 aft bulkhead resulting in the elimination of the current multiple piece welded construction, simplify CM fabrication, and lead to an enhanced design. Phase I (NASA TM-2014-218163 (1)) of this assessment explored spin forming the single-piece CM forward pressure vessel bulkhead. The Orion MPCV Program and Lockheed Martin (LM) recently made two critical decisions relative to the NESC Phase I work scope: (1) LM selected the spin forming process to manufacture a single-piece aft bulkhead for the Orion CM, and (2) the aft bulkhead will be manufactured from Al 2219. Based on the Program's new emphasis related to the spin forming process, the NESC was asked to conduct a Phase II assessment to assist in the LM manufacture of the aft bulkhead and to conduct a feasibility study into spin forming the Orion CM cone. This activity was approved on June 19, 2013. Dr. Robert Piascik, NASA Technical Fellow for Materials at the Langley Research Center (LaRC), was selected to lead this assessment. The project plan was approved by the NASA Engineering and Safety Center (NESC) Review Board (NRB) on July 18, 2013. The primary stakeholders for this assessment were the NASA and LM MPCV Program offices. Additional benefactors are commercial launch providers developing CM concepts.

  7. Spin Forming Aluminum Crew Module (CM) Metallic Aft Pressure Vessel Bulkhead (APVBH) - Phase II

    NASA Technical Reports Server (NTRS)

    Hoffman, Eric K.; Domack, Marcia S.; Torres, Pablo D.; McGill, Preston B.; Tayon, Wesley A.; Bennett, Jay E.; Murphy, Joseph T.

    2015-01-01

    The principal focus of this project was to assist the Multi-Purpose Crew Vehicle (MPCV) program in developing a spin forming fabrication process for manufacture of the Orion crew module (CM) aft pressure vessel bulkhead. The spin forming process will enable a single piece aluminum (Al) alloy 2219 aft bulkhead resulting in the elimination of the current multiple piece welded construction, simplify CM fabrication, and lead to an enhanced design. Phase I (NASA TM-2014-218163, (1)) of this assessment explored spin forming the single-piece CM forward pressure vessel bulkhead. The MPCV Program and Lockheed Martin (LM) recently made two critical decisions relative to the NESC Phase I work scope: (1) LM selected the spin forming process to manufacture a singlepiece aft bulkhead for the Orion CM, and (2) the aft bulkhead will be manufactured from Al 2219. Based on the Program's new emphasis related to the spin forming process, the NESC was asked to conduct a Phase II assessment to assist in the LM manufacture of the aft bulkhead and to conduct a feasibility study into spin forming the Orion CM cone. This activity was approved on June 19, 2013. Dr. Robert Piascik, NASA Technical Fellow for Materials at the Langley Research Center (LaRC), was selected to lead this assessment. The project plan was approved by the NASA Engineering and Safety Center (NESC) Review Board (NRB) on July 18, 2013. The primary stakeholders for this assessment are the NASA and LM MPCV Program offices. Additional benefactors are commercial launch providers developing CM concepts.

  8. Ship Production Symposium Held in Seattle, Washington on August 24-26, 1988 (The National Shipbuilding Research Program)

    DTIC Science & Technology

    1988-08-01

    functional area in which one of the brothers was clearly in charge was engineering. Nat was the Chief Engineer largely because John was blind from the age of...work pack- age that straddles a bulkhead during hot work on the bulkhead, knowing full well that later in time, zones that coincide with the...take the natural step of employing these concepts in large scale repair work. Decreasing work the Marine Industry always fans the flames of the age

  9. Development of an innovative sandwich common bulkhead for cryogenic upper stage propellant tank

    NASA Astrophysics Data System (ADS)

    Szelinski, B.; Lange, H.; Röttger, C.; Sacher, H.; Weiland, S.; Zell, D.

    2012-12-01

    In the frame of the Future Launcher Preparatory Program (FLPP) investigating advancing technologies for the Next Generation of Launchers (NGL) a number of novel key technologies are presently under development for significantly improving vehicle performance in terms of payload capacity and mission versatility. As a respective ESA guided technology development program, Cryogenic Upper Stage Technologies (CUST) has been launched within FLPP that hosts among others the development of a common bulkhead to separate liquid hydrogen from the liquid oxygen compartment. In this context, MT Aerospace proposed an advanced sandwich design concept which is currently in the development phase reaching for TRL4 under MT Aerospace responsibility. Key components of this sandwich common bulkhead are a specific core material, situated in-between two thin aluminum face sheets, and an innovative thermal decoupling element at the equatorial region. The combination of these elements provides excellent thermal insulation capabilities and mechanical performance at a minimum weight, since mechanical and thermal functions are merged in the same component. This improvement is expressed by substantial performance figures of the proposed concept that include high resistance against reverse pressure, an optimized heat leak and minimized mass, involving the sandwich dome structure and the adjacent interface rings. The development of single sub-technologies, all contributing to maturate the sandwich common bulkhead towards the desired technology readiness level (TRL), is described in the context of the given design constraints as well as technical, functional and programmatic requirements, issued from the stage level. This includes the thermal and mechanical characterization of core materials, manufacturing issues as well as non-destructive testing and the thermal and structural analyses and dimensioning of the complete common bulkhead system. Dedicated TRL assessments in the Ariane 5 Mid-life Evolution (A5-ME) program track the progress of these technology developments and analyze their applicability in time for A5-ME. In order to approximate A5-ME concerned preconditions, activities are initiated aiming at harmonization of the available specifications. Hence, a look-out towards a further technology step approaching TRL6 in a subsequent phase is given, briefly addressing topics of full scale manufacture and appropriate thermo-mechanical testing of an entire sandwich common bulkhead.

  10. Aircraft system aft telescope cavity configuration study for Stratospheric Observatory for Infrared Astronomy (SOFIA), phase 2

    NASA Technical Reports Server (NTRS)

    1994-01-01

    The SOFIA Aircraft System (AS) Phase 1 Study was a broad-based study which addressed itself to satisfying technical and programmatic requirements by drawing from existing technology and applying cost-efficient commercial approaches to the aircraft modification. In this SOFIA AS Phase 2 Study, five critical areas of the aircraft were selected for more detailed investigation: forward pressure bulkhead, aft bulkhead, 'free' shell to bulkhead interface, shell cut-out to bulkhead interface, and flooring. The in-depth investigation of these areas upon a finite element model (FEM), with a fine grid model in areas of particular interest, is discussed. The FEM code used is called 'STRAP' and was developed by the engineering firm, Rasmussen and Associates. STRAP is NASTRAN compatible to within 1%. The loads applied to the model were approximated from known 747 envelope conditions. The areas of investigation, and a section through the fuselage is shown. The thrust of this investigation was to develop the design concepts conceived under phase 1 to the point where detailed design could be undertaken with a high level of confidence.

  11. JPRS Report, Science & Technology, Japan, SOR Technology Update

    DTIC Science & Technology

    1990-12-18

    GUN Electron gun c3 GV Gate valve R- ± HL Helmholtz coil IG Ion vacuum gauge IP Ion pump KFC Klystron focusing coil KLY Klystron PB Pre-buncher Q...Therefore, we started studying the manufacture of this kind of film. Recently, such films have been placed on the market as test samples by some foreign... Mixing of sputtered particles from the two targets can also be prevented by making the structure of the bulkhead in the sputtering chamber most

  12. Suitport Feasibility - Human Pressurized Space Suit Donning Tests with the Marman Clamp and Pneumatic Flipper Suitport Concepts

    NASA Technical Reports Server (NTRS)

    Boyle, Robert M.; Rodriggs, Liana; Allton, Charles; Jennings, Mallory; Aitchision, Lindsay

    2013-01-01

    The suitport concept has been recently implemented as part of the small pressurized lunar rover (Currently the Space Exploration vehicle, or SEV) and the Multi-Mission Space Exploration Vehicle (MMSEV) concept demonstrator vehicle. Suitport replaces or augments the traditional airlock function of a spacecraft by providing a bulkhead opening, capture mechanism, and sealing system to allow ingress and egress of a space suit while the space suit remains outside of the pressurized volume of the spacecraft. This presents significant new opportunities to EVA exploration in both microgravity and surface environments. The suitport concept will enable three main improvements in EVA by providing reductions in: pre-EVA time from hours to less than thirty minutes; airlock consumables; contamination returned to the cabin with the EVA crewmember. Two second generation suitports were designed and tested. The previously reported second generation Marman Clamp suitport and a newer concept, the Pneumatic Flipper Suitport. These second generation suitports demonstrated human donning and doffing of the Z1 spacesuit with an 8.3 psi pressure differential across the spacesuit. Testing was performed using the JSC B32 Chamber B, a human rated vacuum chamber. The test included human rated suitports, the suitport compatible prototype suit, and chamber modifications. This test brought these three elements together in the first ever pressurized donning of a rear entry suit through a suitport. This paper presents the results of the testing, including unexpected difficulties with doffing, and engineering solutions implemented to ease the difficulties. A review of suitport functions, including a discussion of the need to doff a pressurized suit in earth gravity, is included. Recommendations for future design and testing are documented.

  13. Suitport Feasibility - Human Pressurized Space Suit Donning Tests with the Marmon Clamp and Pneumatic Flipper Suitport Concepts

    NASA Technical Reports Server (NTRS)

    Boyle, Robert M.; Rodriggs, Liana; Alton, Charles; Jennings, Mallory; Aitchison, Lindsay

    2012-01-01

    The suitport concept has been recently implemented as part of the small pressurized lunar rover (Currently the Space Exploration vehicle, or SEV) and the Multi-Mission Space Exploration Vehicle (MMSEV) concept demonstrator vehicle. Suitport replaces or augments the traditional airlock function of a spacecraft by providing a bulkhead opening, capture mechanism, and sealing system to allow ingress and egress of a space suit while the space suit remains outside of the pressurized volume of the spacecraft. This presents significant new opportunities to EVA exploration in both microgravity and surface environments. The suitport concept will enable three main improvements in EVA by providing reductions in: pre-EVA time from hours to less than thirty minutes; airlock consumables; contamination returned to the cabin with the EVA crewmember. Two second generation suitports were designed and tested. The previously reported second generation Marman Clamp suitport and a newer concept, the Pneumatic Flipper Suitport. These second generation suitports demonstrated human donning and doffing of the Z1 spacesuit with an 8.3 psi pressure differential across the spacesuit. Testing was performed using the JSC B32 Chamber B, a human rated vacuum chamber. The test included human rated suitports, the suitport compatible prototype suit, and chamber modifications. This test brought these three elements together in the first ever pressurized donning of a rear entry suit through a suitport. This paper presents the results of the testing, including unexpected difficulties with doffing, and engineering solutions implemented to ease the difficulties. A review of suitport functions, including a discussion of the need to doff a pressurized suit in earth gravity, is included. Recommendations for future design and testing are documented.

  14. 46 CFR 171.073 - Treatment of stepped and recessed bulkheads in Type II subdivision.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Treatment of stepped and recessed bulkheads in Type II... Treatment of stepped and recessed bulkheads in Type II subdivision. (a) A main transverse watertight bulkhead may not be stepped unless additional watertight bulkheads are located as shown in Figure 171.067(a...

  15. 46 CFR 174.195 - Bulkheads in machinery spaces.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Bulkheads in machinery spaces. 174.195 Section 174.195... in machinery spaces. (a) The bulkhead in each machinery space of each OSV must be watertight to the bulkhead deck. (b) Each penetration of, and each opening in, a bulkhead in a machinery space must— (1) Be...

  16. 46 CFR 174.195 - Bulkheads in machinery spaces.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 7 2014-10-01 2014-10-01 false Bulkheads in machinery spaces. 174.195 Section 174.195... in machinery spaces. (a) The bulkhead in each machinery space of each OSV must be watertight to the bulkhead deck. (b) Each penetration of, and each opening in, a bulkhead in a machinery space must— (1) Be...

  17. 46 CFR 174.195 - Bulkheads in machinery spaces.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 7 2011-10-01 2011-10-01 false Bulkheads in machinery spaces. 174.195 Section 174.195... in machinery spaces. (a) The bulkhead in each machinery space of each OSV must be watertight to the bulkhead deck. (b) Each penetration of, and each opening in, a bulkhead in a machinery space must— (1) Be...

  18. 46 CFR 174.195 - Bulkheads in machinery spaces.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 7 2013-10-01 2013-10-01 false Bulkheads in machinery spaces. 174.195 Section 174.195... in machinery spaces. (a) The bulkhead in each machinery space of each OSV must be watertight to the bulkhead deck. (b) Each penetration of, and each opening in, a bulkhead in a machinery space must— (1) Be...

  19. 46 CFR 174.195 - Bulkheads in machinery spaces.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 7 2012-10-01 2012-10-01 false Bulkheads in machinery spaces. 174.195 Section 174.195... in machinery spaces. (a) The bulkhead in each machinery space of each OSV must be watertight to the bulkhead deck. (b) Each penetration of, and each opening in, a bulkhead in a machinery space must— (1) Be...

  20. 46 CFR 171.067 - Treatment of stepped and recessed bulkheads in Type I subdivision.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Treatment of stepped and recessed bulkheads in Type I... Treatment of stepped and recessed bulkheads in Type I subdivision. (a) For the purpose of this section— (1) The main transverse watertight bulkhead immediately forward of a stepped bulkhead is referred to as...

  1. Nontangent, Developed Contour Bulkheads for a Single-Stage Launch Vehicle

    NASA Technical Reports Server (NTRS)

    Wu, K. Chauncey; Lepsch, Roger A., Jr.

    2000-01-01

    Dry weights for single-stage launch vehicles that incorporate nontangent, developed contour bulkheads are estimated and compared to a baseline vehicle with 1.414 aspect ratio ellipsoidal bulkheads. Weights, volumes, and heights of optimized bulkhead designs are computed using a preliminary design bulkhead analysis code. The dry weights of vehicles that incorporate the optimized bulkheads are predicted using a vehicle weights and sizing code. Two optimization approaches are employed. A structural-level method, where the vehicle's three major bulkhead regions are optimized separately and then incorporated into a model for computation of the vehicle dry weight, predicts a reduction of4365 lb (2.2 %) from the 200,679-lb baseline vehicle dry weight. In the second, vehicle-level, approach, the vehicle dry weight is the objective function for the optimization. For the vehicle-level analysis, modified bulkhead designs are analyzed and incorporated into the weights model for computation of a dry weight. The optimizer simultaneously manipulates design variables for all three bulkheads to reduce the dry weight. The vehicle-level analysis predicts a dry weight reduction of 5129 lb, a 2.6% reduction from the baseline weight. Based on these results, nontangent, developed contour bulkheads may provide substantial weight savings for single stage vehicles.

  2. National Aerospace Plane Integrated Fuselage/Cryotank Risk Reduction program

    NASA Astrophysics Data System (ADS)

    Dayton, K. E.

    1993-06-01

    The principal objectives and results of the National Aerospace Plane (NASP) Integrated Risk Reduction program are briefly reviewed. The program demonstrated the feasibility of manufacturing lightweight advanced composite materials for single-stage-to-orbit hypersonic flight vehicle applications. A series of combined load simulation tests (thermal, mechanical, and cryogenic) demonstrated proof of concept performance for an all unlined composite cryogenic fuel tank with flat end bulkheads and a high-temperature thin-shell advanced composite fuselage. Temperatures of the fuselage were as high as 1300 F, with 100 percent bending and shear loads applied to the tank while filled with 850 gallons of cryogenic fluid hydrogen (-425 F). Leak rates measured on and around the cryotank shell and bulkheads were well below acceptable levels.

  3. Thermal conductivity of aerogel blanket insulation under cryogenic-vacuum conditions in different gas environments

    NASA Astrophysics Data System (ADS)

    E Fesmire, J.; Ancipink, J. B.; Swanger, A. M.; White, S.; Yarbrough, D.

    2017-12-01

    Thermal conductivity of low-density materials in thermal insulation systems varies dramatically with the environment: cold vacuum pressure, residual gas composition, and boundary temperatures. Using a reference material of aerogel composite blanket (reinforcement fibers surrounded by silica aerogel), an experimental basis for the physical heat transmission model of aerogel composites and other low-density, porous materials is suggested. Cryogenic-vacuum testing between the boundary temperatures of 78 K and 293 K is performed using a one meter cylindrical, absolute heat flow calorimeter with an aerogel blanket specimen exposed to different gas environments of nitrogen, helium, argon, or CO2. Cold vacuum pressures include the full range from 1×10-5 torr to 760 torr. The soft vacuum region, from about 0.1 torr to 10 torr, is complex and difficult to model because all modes of heat transfer - solid conduction, radiation, gas conduction, and convection - are significant contributors to the total heat flow. Therefore, the soft vacuum tests are emphasized for both heat transfer analysis and practical thermal data. Results for the aerogel composite blanket are analyzed and compared to data for its component materials. With the new thermal conductivity data, future applications of aerogel-based insulation systems are also surveyed. These include Mars exploration and surface systems in the 5 torr CO2 environment, field joints for vacuum-jacketed cryogenic piping systems, common bulkhead panels for cryogenic tanks on space launch vehicles, and liquid hydrogen cryofuel systems with helium purged conduits or enclosures.

  4. Long-Term Cryogenic Propellant Storage on Mars with Hercules Propellant Storage Facility

    NASA Technical Reports Server (NTRS)

    Liu, Gavin

    2017-01-01

    This report details the process and results of roughly sizing the steady state, zero boil-off thermal and power parameters of the Hercules Propellant Storage Facility. For power analysis, isothermal and isobaric common bulkhead tank scenarios are considered. An estimated minimum power requirement of 8.3 kW for the Reverse Turbo-Brayton Cryocooler is calculated. Heat rejection concerns in soft vacuum Mars atmosphere are noted and potential solutions are proposed. Choice of coolant for liquid propellant conditioning and issues with current proposed cryocooler cycle are addressed; recommendations are made, e.g. adding a Joule-Thomson expansion valve after the Reverse Turbo-Brayton turbine in order to have two-phase, isothermal heat exchange through the Broad Area Cooling system. Issues with cross-country transfer lines from propellant storage to flight vehicle are briefly discussed: traditional vacuum jacketed lines are implausible, and Mars insulation needs to be developed.

  5. Buckling Design Studies of Inverted, Oblate Bulkheads for a Propellant Tank

    NASA Technical Reports Server (NTRS)

    Smeltzer, Stanley S., III; Bowman, Lynn M.

    2002-01-01

    An investigation of the deformation and buckling characteristics of a composite, oblate bulkhead that has an inverted geometry and is subjected to pressure-only loading is presented for three bulkhead geometries and thicknesses. The effects of a stiffening support ring at the bulkhead to cylinder interface are also evaluated. Buckling analyses conducted using the axisymmetric shell code BOSOR4 are discussed for several bulkhead configurations. These results are analytically verified using results from the Structural Analysis of General Shells (STAGS) code for a selected bulkhead configuration. The buckling characterization of an inverted, oblate bulkhead requires careful attention as small changes in bulkhead parameters can have a significant effect on the critical buckling load. Comparison of BOSOR4 and STAGS results provided a very good correlation between the two analysis methods. In addition, the analysis code BOSOR4 was found to be an efficient sizing tool that is useful during the preliminary design stage of a practical shell structure. Together, these two aspects should give the design engineer confidence in sizing these stability critical structures. Additional characterization is warranted, especially for a composite tank structure, since only one bulkhead configuration was examined closely.

  6. A NASTRAN Vibration Model of the AH-1G Helicopter Airframe. Volume 1

    DTIC Science & Technology

    1974-06-01

    Bulkhead .012 ZZ 1863343 Bulkhead .012 AAA 1863345 Bulkhead .012 j EBB 1863546 Bulkhead .012 j ccc 1863746 Bulkhead .012 \\ ODD 1863748...123 12) 123 RULE AAA AAA AAA AAA BBB EBB AAA AAA AAA AAA BBB BBB OMIT D.O.F. 456 456 123 123 123 123 123 123 123 123 RULE...load in the member Increases. The program determines the section properties, unsytnmetrical bending stresses, element loads and shear flows for a

  7. 78 FR 64164 - Airworthiness Directives; the Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-10-28

    .... ACTION: Final rule. SUMMARY: We are adopting a new airworthiness directive (AD) for certain the Boeing... frame, forward and aft inner chords, floor support, bulkhead upper web on the upper left and right side of the bulkhead, and the bulkhead lower web on the lower left side of the bulkhead and repair if...

  8. 46 CFR 174.340 - Collision bulkhead.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... PERTAINING TO SPECIFIC VESSEL TYPES Hopper Dredges With Working Freeboard Assignments Design § 174.340 Collision bulkhead. Each hopper dredge must have a collision bulkhead that is located not less than 5...

  9. 46 CFR 174.340 - Collision bulkhead.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... PERTAINING TO SPECIFIC VESSEL TYPES Hopper Dredges With Working Freeboard Assignments Design § 174.340 Collision bulkhead. Each hopper dredge must have a collision bulkhead that is located not less than 5...

  10. Evaluating Fire Doors with Hose Ports.

    DTIC Science & Technology

    1987-06-01

    cm) of approved mineral wool structural insulation was applied to the fire side of the steel bulkhead. Steel pins were welded to the bulkhead and the...steel bulkheads, by continuously welding the frame Cl]nce to the bulkhead, USCG approved mineral wool structural insulation was applied on one side of

  11. 46 CFR 45.111 - Strength of bulkheads at ends of superstructures.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 2 2011-10-01 2011-10-01 false Strength of bulkheads at ends of superstructures. 45.111... LOAD LINES Conditions of Assignment § 45.111 Strength of bulkheads at ends of superstructures. Bulkheads at ends of enclosed superstructures must have sufficient strength to withstand impact of boarding...

  12. 46 CFR 45.111 - Strength of bulkheads at ends of superstructures.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 2 2010-10-01 2010-10-01 false Strength of bulkheads at ends of superstructures. 45.111... LOAD LINES Conditions of Assignment § 45.111 Strength of bulkheads at ends of superstructures. Bulkheads at ends of enclosed superstructures must have sufficient strength to withstand impact of boarding...

  13. 10. VIEW OF PIER 42 BULKHEAD BUILDING INTERIOR (PARTIALLY DEMOLISHED) ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    10. VIEW OF PIER 42 BULKHEAD BUILDING INTERIOR (PARTIALLY DEMOLISHED) WITH JAVA HOUSE IN BACKGROUND, FACING NORTH. - Pier 42 Bulkhead Building, Pier 42, Embarcadero, San Francisco, San Francisco County, CA

  14. 46 CFR 108.135 - Boundary bulkheads, decks of galleys, and combustible material lockers.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... material lockers. 108.135 Section 108.135 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED... Protection § 108.135 Boundary bulkheads, decks of galleys, and combustible material lockers. Each boundary... storage locker must be an A class bulkhead and A class deck respectively. ...

  15. 46 CFR 108.135 - Boundary bulkheads, decks of galleys, and combustible material lockers.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... material lockers. 108.135 Section 108.135 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED... Protection § 108.135 Boundary bulkheads, decks of galleys, and combustible material lockers. Each boundary... storage locker must be an A class bulkhead and A class deck respectively. ...

  16. 46 CFR 108.135 - Boundary bulkheads, decks of galleys, and combustible material lockers.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... material lockers. 108.135 Section 108.135 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED... Protection § 108.135 Boundary bulkheads, decks of galleys, and combustible material lockers. Each boundary... storage locker must be an A class bulkhead and A class deck respectively. ...

  17. 46 CFR 108.135 - Boundary bulkheads, decks of galleys, and combustible material lockers.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... material lockers. 108.135 Section 108.135 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED... Protection § 108.135 Boundary bulkheads, decks of galleys, and combustible material lockers. Each boundary... storage locker must be an A class bulkhead and A class deck respectively. ...

  18. 46 CFR 108.135 - Boundary bulkheads, decks of galleys, and combustible material lockers.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... material lockers. 108.135 Section 108.135 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED... Protection § 108.135 Boundary bulkheads, decks of galleys, and combustible material lockers. Each boundary... storage locker must be an A class bulkhead and A class deck respectively. ...

  19. Hydrogeochemical effects of a bulkhead in the Dinero mine tunnel, Sugar Loaf mining district, near Leadville, Colorado

    USGS Publications Warehouse

    Walton-Day, Katherine; Mills, Taylor J.

    2015-01-01

    The Dinero mine drainage tunnel is an abandoned, draining mine adit near Leadville, Colorado, that has an adverse effect on downstream water quality and aquatic life. In 2009, a bulkhead was constructed (creating a mine pool and increasing water-table elevations behind the tunnel) to limit drainage from the tunnel and improve downstream water quality. The goal of this study was to document changes to hydrology and water quality resulting from bulkhead emplacement, and to understand post-bulkhead changes in source water and geochemical processes that control mine-tunnel discharge and water quality. Comparison of pre-and post-bulkhead hydrology and water quality indicated that tunnel discharge and zinc and manganese loads decreased by up to 97 percent at the portal of Dinero tunnel and at two downstream sites (LF-537 and LF-580). However, some water-quality problems persisted at LF-537 and LF-580 during high-flow events and years, indicating the effects of the remaining mine waste in the area. In contrast, post-bulkhead water quality degraded at three upstream stream sites and a draining mine tunnel (Nelson tunnel). Water-quality degradation in the streams likely occurred from increased contributions of mine-pool groundwater to the streams. In contrast, water-quality degradation in the Nelson tunnel was likely from flow of mine-pool water along a vein that connects the Nelson tunnel to mine workings behind the Dinero tunnel bulkhead. Principal components analysis, mixing analysis, and inverse geochemical modeling using PHREEQC indicated that mixing and geochemical reactions (carbonate dissolution during acid weathering, precipitation of goethite and birnessite, and sorption of zinc) between three end-member water types generally explain the pre-and post-bulkhead water composition at the Dinero and Nelson tunnels. The three end members were (1) a relatively dilute groundwater having low sulfate and trace element concentrations; (2) mine pool water, and (3) water that flowed from a structure in front of the bulkhead after bulkhead emplacement. Both (2) and (3) had high sulfate and trace element concentrations. These results indicate how analysis of monitoring information can be used to understand hydrogeochemical changes resulting from bulkhead emplacement. This understanding, in turn, can help inform future decisions on the disposition of the remaining mine waste and water-quality problems in the area.

  20. 46 CFR 108.133 - Hull superstructure, structural bulkheads, decks, and deckhouses.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Hull superstructure, structural bulkheads, decks, and deckhouses. 108.133 Section 108.133 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) A... Protection § 108.133 Hull superstructure, structural bulkheads, decks, and deckhouses. Each hull...

  1. 46 CFR 108.133 - Hull superstructure, structural bulkheads, decks, and deckhouses.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 4 2014-10-01 2014-10-01 false Hull superstructure, structural bulkheads, decks, and deckhouses. 108.133 Section 108.133 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) A... Protection § 108.133 Hull superstructure, structural bulkheads, decks, and deckhouses. Each hull...

  2. 46 CFR 108.133 - Hull superstructure, structural bulkheads, decks, and deckhouses.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 4 2012-10-01 2012-10-01 false Hull superstructure, structural bulkheads, decks, and deckhouses. 108.133 Section 108.133 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) A... Protection § 108.133 Hull superstructure, structural bulkheads, decks, and deckhouses. Each hull...

  3. 46 CFR 179.210 - Collision bulkhead.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ....210 Collision bulkhead. (a) A vessel of more than 19.8 meters (65 feet) in length must have a collision bulkhead. (b) A vessel of not more than 19.8 meters (65 feet) in length must have a collision....2 meters (40 feet) in length and operates on partially protected waters; or (4) Is constructed of...

  4. Heat sink structural design concepts for a hypersonic research airplane

    NASA Technical Reports Server (NTRS)

    Taylor, A. H.; Jackson, L. R.

    1977-01-01

    Hypersonic research aircraft design requires careful consideration of thermal stresses. This paper relates some of the problems in a heat sink structural design that can be avoided by appropriate selection of design options including material selection, design concepts, and load paths. Data on several thermal loading conditions are presented on various conventional designs including bulkheads, longerons, fittings, and frames. Results indicate that conventional designs are inadequate and that acceptable designs are possible by incorporating innovative design practices. These include nonintegral pressure compartments, ball-jointed links to distribute applied loads without restraining the thermal expansion, and material selections based on thermal compatibility.

  5. 46 CFR 171.085 - Collision bulkhead.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... the collision bulkhead must be at least— (1) 5 percent of the LBP from the forward perpendicular in a motor vessel; and (2) 5 feet (1.52 meters) from the forward perpendicular in a steam vessel. (d) The collision bulkhead must be no more than 10 feet (3 meters) plus 5 percent of the LBP from the forward...

  6. 46 CFR 171.085 - Collision bulkhead.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... the collision bulkhead must be at least— (1) 5 percent of the LBP from the forward perpendicular in a motor vessel; and (2) 5 feet (1.52 meters) from the forward perpendicular in a steam vessel. (d) The collision bulkhead must be no more than 10 feet (3 meters) plus 5 percent of the LBP from the forward...

  7. 46 CFR 173.060 - Openings in the side of a vessel below the bulkhead or weather deck.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... weather deck. 173.060 Section 173.060 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED... of a vessel below the bulkhead or weather deck. (a) Openings in the side of a vessel below the bulkhead or weather deck must comply with the requirements in subpart F of part 171 of this subchapter or...

  8. 46 CFR 173.060 - Openings in the side of a vessel below the bulkhead or weather deck.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... weather deck. 173.060 Section 173.060 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED... of a vessel below the bulkhead or weather deck. (a) Openings in the side of a vessel below the bulkhead or weather deck must comply with the requirements in subpart F of part 171 of this subchapter or...

  9. 46 CFR 173.060 - Openings in the side of a vessel below the bulkhead or weather deck.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... weather deck. 173.060 Section 173.060 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED... of a vessel below the bulkhead or weather deck. (a) Openings in the side of a vessel below the bulkhead or weather deck must comply with the requirements in subpart F of part 171 of this subchapter or...

  10. 46 CFR 173.060 - Openings in the side of a vessel below the bulkhead or weather deck.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... weather deck. 173.060 Section 173.060 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED... of a vessel below the bulkhead or weather deck. (a) Openings in the side of a vessel below the bulkhead or weather deck must comply with the requirements in subpart F of part 171 of this subchapter or...

  11. 46 CFR 173.060 - Openings in the side of a vessel below the bulkhead or weather deck.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... weather deck. 173.060 Section 173.060 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED... of a vessel below the bulkhead or weather deck. (a) Openings in the side of a vessel below the bulkhead or weather deck must comply with the requirements in subpart F of part 171 of this subchapter or...

  12. 46 CFR 171.095 - Machinery space bulkhead.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 7 2011-10-01 2011-10-01 false Machinery space bulkhead. 171.095 Section 171.095... PERTAINING TO VESSELS CARRYING PASSENGERS Additional Subdivision Requirements § 171.095 Machinery space... transverse watertight bulkheads to separate the machinery space from the remainder of the vessel. All...

  13. 46 CFR 171.095 - Machinery space bulkhead.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Machinery space bulkhead. 171.095 Section 171.095... PERTAINING TO VESSELS CARRYING PASSENGERS Additional Subdivision Requirements § 171.095 Machinery space... transverse watertight bulkheads to separate the machinery space from the remainder of the vessel. All...

  14. 46 CFR 171.095 - Machinery space bulkhead.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 7 2014-10-01 2014-10-01 false Machinery space bulkhead. 171.095 Section 171.095... PERTAINING TO VESSELS CARRYING PASSENGERS Additional Subdivision Requirements § 171.095 Machinery space... transverse watertight bulkheads to separate the machinery space from the remainder of the vessel. All...

  15. 46 CFR 171.095 - Machinery space bulkhead.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 7 2013-10-01 2013-10-01 false Machinery space bulkhead. 171.095 Section 171.095... PERTAINING TO VESSELS CARRYING PASSENGERS Additional Subdivision Requirements § 171.095 Machinery space... transverse watertight bulkheads to separate the machinery space from the remainder of the vessel. All...

  16. 46 CFR 171.095 - Machinery space bulkhead.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 7 2012-10-01 2012-10-01 false Machinery space bulkhead. 171.095 Section 171.095... PERTAINING TO VESSELS CARRYING PASSENGERS Additional Subdivision Requirements § 171.095 Machinery space... transverse watertight bulkheads to separate the machinery space from the remainder of the vessel. All...

  17. Spin Forming of an Aluminum 2219-T6 Aft Bulkhead for the Orion Multi-Purpose Crew Vehicle: Phase II Supplemental Report

    NASA Technical Reports Server (NTRS)

    Piascik, Robert S.; Squire, Michael D.; Domack, Marcia S.; Hoffman, Eric K.

    2015-01-01

    The principal focus of this project was to assist the Orion Multi-Purpose Crew Vehicle (MPCV) Program in developing a spin forming fabrication process for manufacture of the aft bulkhead of the pressure vessel. The spin forming process will enable a single piece aluminum (Al) 2219 aft bulkhead which will eliminate the current multiple piece welded construction, simplify fabrication, and lead to an enhanced design that will reduce vehicle weight by eliminating welds. Phase I of this assessment explored spin forming the single-piece forward pressure vessel bulkhead from aluminum-lithium 2195.

  18. Suitport Feasibility - Development and Test of a Suitport and Space Suit for Human Pressurized Space Suit Donning Tests

    NASA Technical Reports Server (NTRS)

    Boyle, Robert M.; Mitchell, Kathryn; Allton, Charles; Ju, Hsing

    2011-01-01

    The suitport concept has been recently implemented as part of the small pressurized lunar rover (Currently the Space Exploration vehicle, or SEV) and the Multi-Mission Space Exploration Vehicle (MMSEV) concept demonstrator vehicle. Suitport replaces or augments the traditional airlock function of a spacecraft by providing a bulkhead opening, capture mechanism, and sealing system to allow ingress and egress of a spacesuit while the spacesuit remains outside of the pressurized volume of the spacecraft. This presents significant new opportunities to EVA exploration in both microgravity and surface environments. The suitport concept will enable three main improvements in EVA by providing reductions in: pre-EVA time from hours to less than thirty minutes; airlock consumables; contamination returned to the cabin with the EVA crewmember. To date, the first generation suitport has been tested with mockup suits on the rover cabins and pressurized on a bench top engineering unit. The work on the rover cabin has helped define the operational concepts and timelines, and has demonstrated the potential of suitport to save significant amounts of crew time before and after EVAs. The work with the engineering unit has successfully demonstrated the pressurizable seal concept including the ability to seal after the introduction and removal of contamination to the sealing surfaces. Using this experience, a second generation suitport was designed. This second generation suitport has been tested with a spacesuit prototype using the pressure differentials of the spacecraft. This test will be performed using the JSC B32 Chamber B, a human rated vacuum chamber. This test will include human rated suitports, the suitport compatible prototype suit, and chamber modifications. This test will bring these three elements together in the first ever pressurized donning of a rear entry suit through a suitport. This paper presents design of a human rated second generation suitport, modifications to the JSC human rated chamber B to accept a suitport, and a compatible space suit to support pressurized human donning of the pressurized suit through a suitport. Design challenges and solutions and compromises required to develop the system are presented. Initial human testing results are presented.

  19. Nondestructive Evaluation Methods for the Ares I Common Bulkhead

    NASA Technical Reports Server (NTRS)

    Walker, James

    2010-01-01

    A large scale bonding demonstration test article was fabricated to prove out manufacturing techniques for the current design of the NASA Ares I Upper Stage common bulkhead. The common bulkhead serves as the single interface between the liquid hydrogen and liquid oxygen portions of the Upper Stage propellant tank. The bulkhead consists of spin-formed aluminum domes friction stir welded to Y-rings and bonded to a perforated phenolic honeycomb core. Nondestructive evaluation methods are being developed for assessing core integrity and the core-to-dome bond line of the common bulkhead. Detection of manufacturing defects such as delaminations between the core and face sheets as well as service life defects such as crushed or sheared core resulting from impact loading are all of interest. The focus of this work will be on the application of thermographic, shearographic, and phased array ultrasonic methods to the bonding demonstration article as well as various smaller test panels featuring design specific defect types and geometric features.

  20. 16. VIEW OF BULKHEAD IN FISH HOLD. NOTE SCANTLINGS WHICH ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    16. VIEW OF BULKHEAD IN FISH HOLD. NOTE SCANTLINGS WHICH FORM A VERTICAL SLOT FOR BOARDS. THESE BOARDS ALSO ENABLED THE FISHERMAN TO SORT THE CATCH BY SPECIES INTO VARIOUS COMPARTMENTS. THE HOLES AT THE BASE OF THE BULKHEAD ALLOWED WATER FROM MELTED ICE TO DRAIN OUT OF THE COMPARTMENT. - Auxiliary Fishing Schooner "Evelina M. Goulart", Essex Shipbuilding Museum, 66 Main Street, Essex, Essex County, MA

  1. 13. PRATT STREET BULKHEAD: SECTIONS 2, 3, 4, 5, AND ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    13. PRATT STREET BULKHEAD: SECTIONS 2, 3, 4, 5, AND 6, DRAWER 10, PLAN NO. 1, 1 IN. = 15 FT. AND 1/2 IN. = 1 FT., APRIL 25, 1906, DRAWING SHOWS DESIGN FOR PRATT STREET BULKHEAD BETWEEN PIERS - Baltimore Inner Harbor, Pier 5, South of Pratt Street between Market Place & Concord Street, Baltimore, Independent City, MD

  2. Discrimination between Fatigue Cracking and Mechanical Damage in Aircraft Fastener Holes by Eddy-Current Phase Rotation

    DTIC Science & Technology

    2016-08-01

    present work, a systematic BHEC and fractographic study has been conducted by inspecting several hundred fastener holes in ex-service F/A- 18 ...BHEC and fractographic study was conducted by inspecting several hundred fastener holes in ex-service F/A- 18 aircraft bulkheads, following fatigue...study is based on BHEC inspections of several hundred fastener holes in ex-service F/A- 18 aircraft bulkheads. These Al-alloy bulkheads contained

  3. High temperature penetrator assembly with bayonet plug and ramp-activated lock

    NASA Technical Reports Server (NTRS)

    Wood, K. E. (Inventor)

    1982-01-01

    A penetration apparatus, for very high temperature applications in which a base plug is inserted into an opening through a bulkhead is described. The base plug has a head shape and is seated against the highest temperature surface of the bulkhead, which may be the skin of the nose cone or other part of a space vehicle intended for nondestructive atmospheric reentry. From the second side of the bulkhead at which the less severe environment is extant, a bayonet plug is inserted into the base plug and engages an internal shoulder at about 90 deg rotation. The bayonet plug has an integral flanged portion and a pair of ramping washers which are located between the flange and the second bulkhead surface with a spacing washer as necessary.

  4. 76 FR 13067 - Airworthiness Directives; The Boeing Company Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-10

    ... and strut forward bulkhead of the forward engine mount and adjacent support structure, and visual... cracked hanger fittings, back-up angles, and bulkhead of the forward engine mount, which could lead to failure of the hanger fitting and bulkhead and consequent separation of the engine from the airplane...

  5. Development of composite carrythrough bulkhead

    NASA Technical Reports Server (NTRS)

    Ehlen, R. J.; Libeskind, M.

    1992-01-01

    A structural development program was recently completed in which the weight and fatigue advantages of an all composite major load carrying bulkhead was successfully demonstrated. Fabrication of a full scale article, including static and fatigue testing of the carry-through beam portion verified the producibility, strength and durability of this design, thereby presenting the opportunity for use on aircraft upgrades and new aircraft. A 15% weight saving is achievable and, more importantly, the fatigue problems that normally plague metal bulkheads are virtually eliminated.

  6. Bulkhead insert for an internal combustion engine

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    Maki, Clifford E.; Chottiner, Jeffrey Eliot; Williams, Rick L.

    An engine includes a cylinder block defining at least one main bearing bulkhead adjacent to a cylinder, and a crankshaft rotatably housed within the block by a main bearing. A bulkhead insert has a cap portion, and an insert portion provided within the bulkhead. The insert portion has having first and second end regions connected by first and second straps. Each strap having a flanged beam cross section. The first and second ends of the insert portion are configured to connect a main bearing cap column to a cylinder head column. Each of the first and second end regions definemore » at least one protrusion having a surface substantially normal to engine combustion and reactive loads. The cap portion is configured to mate with the first end region at the main bearing cap column and support the main bearing.« less

  7. Detail of sheet steel bulkhead, wharf A, looking northwest ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Detail of sheet steel bulkhead, wharf A, looking northwest - U.S. Coast Guard Sandy Hook Station, Western Docking Structure, West of intersection of Canfield Road & Hartshorne Drive, Highlands, Monmouth County, NJ

  8. View forward from bulkhead no. 38 of compartment B126 crew ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View forward from bulkhead no. 38 of compartment B-126 crew space. Note stop valves on bulkhead at right side of photograph; these steam control valves allowed remote activation of the main, auxiliary and safety valves for the port engine in the event that the engine room valves were disabled or unreachable. (044) - USS Olympia, Penn's Landing, 211 South Columbus Boulevard, Philadelphia, Philadelphia County, PA

  9. View northwest, wharf A, sheet steel bulkhead, steel lift tower ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View northwest, wharf A, sheet steel bulkhead, steel lift tower - U.S. Coast Guard Sandy Hook Station, Western Docking Structure, West of intersection of Canfield Road & Hartshorne Drive, Highlands, Monmouth County, NJ

  10. 9. Roof. A view looking north, showing the elevator bulkheads ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    9. Roof. A view looking north, showing the elevator bulkheads and the retrofit air-conditioning compressors and air handlers. - John T. Beasley Building, 632 Cherry Street (between Sixth & Seventh Streets), Terre Haute, Vigo County, IN

  11. 29 CFR 1926.804 - Definitions applicable to this subpart.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... between the face and bulkhead, in order to prevent flooding the crown of the tunnel between the safety screen and the bulkhead, thus providing a safe means of refuge and exit from a flooding or flooded tunnel...

  12. 29 CFR 1926.804 - Definitions applicable to this subpart.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... between the face and bulkhead, in order to prevent flooding the crown of the tunnel between the safety screen and the bulkhead, thus providing a safe means of refuge and exit from a flooding or flooded tunnel...

  13. Suitport Feasibility: Development and Test of a Suitport and Space Suit for Human Pressurized Space Suit Donning Tests

    NASA Technical Reports Server (NTRS)

    Boyle, Robert M.; Mitchell, Kathryn; Allton, Charles; Ju, Hsing

    2012-01-01

    The suitport concept has been recently implemented as part of the small pressurized lunar rover (Currently the Space Exploration vehicle, or SEV) and the Multi-Mission Space Exploration Vehicle (MMSEV) concept demonstrator vehicle. Suitport replaces or augments the traditional airlock function of a spacecraft by providing a bulkhead opening, capture mechanism, and sealing system to allow ingress and egress of a space suit while the space suit remains outside of the pressurized volume of the spacecraft. This presents significant new opportunities to EVA exploration in both microgravity and surface environments. The suitport concept will enable three main improvements in EVA by providing reductions in: pre-EVA time from hours to less than thirty minutes; airlock consumables; contamination returned to the cabin with the EVA crewmember. To date, the first generation suitport has been tested with mockup suits on the rover cabins and pressurized on a bench top engineering unit. The work on the rover cabin has helped define the operational concepts and timelines, and has demonstrated the potential of suitport to save significant amounts of crew time before and after EVAs. The work with the engineering unit has successfully demonstrated the pressurizable seal concept including the ability to seal after the introduction and removal of contamination to the sealing surfaces. Using this experience, a second generation suitport was designed. This second generation suitport has been tested with a space suit prototype on the second generation MMSEV cabin, and testing is planned using the pressure differentials of the spacecraft. Pressurized testing will be performed using the JSC B32 Chamber B, a human rated vacuum chamber. This test will include human rated suitports, a suitport compatible prototype suit, and chamber modifications. This test will bring these three elements together in the first ever pressurized donning of a rear entry suit through a suitport. This paper presents the design of a human rated second generation suitport, the design of a suit capable of supporting pressurized human donning through a suitport, ambient pressure testing of the suit with the suitport, and modifications to the JSC human rated chamber B to accept a suitport. Design challenges and solutions, as well as compromises required to develop the system, are presented. Initial human testing results are presented.

  14. 13. CLOSEUP OF AFT BULKHEAD IN THE MAIN HOLD. HORIZONTAL ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    13. CLOSE-UP OF AFT BULKHEAD IN THE MAIN HOLD. HORIZONTAL ALUMINUM SCALE RESTING ON STEP IS FOUR FEET LONG. THE BOTTOM OF THE HOLD IS MADE OF POURED CONCRETE AND HAS A CENTER DRAIN TO COLLECT WATER FROM MELTING ICE AND OTHER FLUIDS. THE DRAIN LED TO A SUMP CLEARED BY A BILGE PUMP WHICH PUMPED OVERBOARD. THE RECTANGULAR OPENING IN THE BULKHEAD WAS CUT TO ENABLE EASIER REMOVAL OF THE ENGINE AFTER THE EVELINA M. GOULART WAS ABANDONED. - Auxiliary Fishing Schooner "Evelina M. Goulart", Essex Shipbuilding Museum, 66 Main Street, Essex, Essex County, MA

  15. 18. VIEW OF SETTLING BASIN FROM UPSTREAM TRESTLE, SHOWING BULKHEAD ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    18. VIEW OF SETTLING BASIN FROM UPSTREAM TRESTLE, SHOWING BULKHEAD ON RIGHT AND SAND BANK ON LEFT, LOOKING NORTHWEST - Electron Hydroelectric Project, Along Puyallup River, Electron, Pierce County, WA

  16. 49 CFR 176.2 - Definitions.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... permanent steel bulkheads. CSC safety approval plate means the safety approval plate specified in Annex I of... tank tops, decks, bulkheads, frames, plating, or ladders, or used for filling voids or fitting around... cargo on board a vessel. Portable magazine means a strong, closed, prefabricated, steel or wooden...

  17. Deck plan with straight and winged bulkheads Promontory Route ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Deck plan with straight and winged bulkheads - Promontory Route Railroad Trestles, S.P. Trestle 779.91, One mile southwest of junction of State Highway 83 and Blue Creek, Corinne, Box Elder County, UT

  18. PHyTIR - A Prototype Thermal Infrared Radiometer

    NASA Technical Reports Server (NTRS)

    Jau, Bruno M.; Hook, Simon J.; Johnson, William R.; Foote, Marc C.; Paine, Christopher G.; Pannell, Zack W.; Smythe, Robert F.; Kuan, Gary M.; Jakoboski, Julie K.; Eng, Bjorn T.

    2013-01-01

    This paper describes the PHyTIR (Prototype HyspIRI Thermal Infrared Radiometer) instrument, which is the engineering model for the proposed HyspIRI (Hyperspectral Infrared Imager) earth observing instrument. The HyspIRI mission would be comprised of the HyspIRI TIR (Thermal Infrared Imager), and a VSWIR (Visible Short-Wave Infra-Red Imaging Spectrometer). Both instruments would be used to address key science questions related to the earth's carbon cycle, ecosystems, climate, and solid earth properties. Data gathering of volcanic activities, earthquakes, wildfires, water use and availability, urbanization, and land surface compositions and changes, would aid the predictions and evaluations of such events and the impact they create. Even though the proposed technology for the HyspIRI imager is mature, the PHyTIR prototype is needed to advance the technology levels for several of the instrument's key components, and to reduce risks, in particular to validate 1) the higher sensitivity, spatial resolution, and higher throughput required for this focal plane array, 2) the pointing accuracy, 2) the characteristics of several spectral channels, and 4) the use of ambient temperature optics. The PHyTIR telescope consists of the focal plane assembly that is housed within a cold housing located inside a vacuum enclosure; all mounted to a bulkhead, and an optical train that consists of 3 powered mirrors; extending to both sides of the bulkhead. A yoke connects the telescope to a scan mirror. The rotating mirror enables to scan- a large track on the ground. This structure is supported by kinematic mounts, linking the telescope assembly to a base plate that would also become the spacecraft interface for HyspIRI. The focal plane's cooling units are also mounted to the base plate, as is an overall enclosure that has two viewing ports with large exterior baffles, shielding the focal plane from incoming stray light. PHyTIR's electronics is distributed inside and near the vacuum enclosure, and in a nearby rack. The data acquisition technique would be to take measurements over a 51deg wide swath in the cross spacecraft velocity direction, which is brought into view through the rotating scan mirror. A landscape mosaic thus can be assembled by overlaying rows of measurements. The paper briefly outlines the proposed HyspIRI mission and its data acquisition technique; it then describes the prototype PHyTIR instrument.

  19. 46 CFR 108.143 - Accommodation space.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Accommodation space. 108.143 Section 108.143 Shipping... EQUIPMENT Construction and Arrangement Structural Fire Protection § 108.143 Accommodation space. (a) Each corridor bulkhead in an accommodation space must be an A class or B class bulkhead except if an A class...

  20. 46 CFR 108.143 - Accommodation space.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 4 2011-10-01 2011-10-01 false Accommodation space. 108.143 Section 108.143 Shipping... EQUIPMENT Construction and Arrangement Structural Fire Protection § 108.143 Accommodation space. (a) Each corridor bulkhead in an accommodation space must be an A class or B class bulkhead except if an A class...

  1. 46 CFR 108.143 - Accommodation space.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 4 2014-10-01 2014-10-01 false Accommodation space. 108.143 Section 108.143 Shipping... EQUIPMENT Construction and Arrangement Structural Fire Protection § 108.143 Accommodation space. (a) Each corridor bulkhead in an accommodation space must be an A class or B class bulkhead except if an A class...

  2. 46 CFR 108.143 - Accommodation space.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 4 2013-10-01 2013-10-01 false Accommodation space. 108.143 Section 108.143 Shipping... EQUIPMENT Construction and Arrangement Structural Fire Protection § 108.143 Accommodation space. (a) Each corridor bulkhead in an accommodation space must be an A class or B class bulkhead except if an A class...

  3. 46 CFR 108.143 - Accommodation space.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 4 2012-10-01 2012-10-01 false Accommodation space. 108.143 Section 108.143 Shipping... EQUIPMENT Construction and Arrangement Structural Fire Protection § 108.143 Accommodation space. (a) Each corridor bulkhead in an accommodation space must be an A class or B class bulkhead except if an A class...

  4. 46 CFR 174.100 - Appliances for watertight and weathertight integrity.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... contributing to the strength of the bulkhead. Provision must also be made to adequately support the thrust bearings and other equipment that may be mounted on the bulkhead or deck. (2) Sliding watertight door...

  5. 46 CFR 174.100 - Appliances for watertight and weathertight integrity.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... contributing to the strength of the bulkhead. Provision must also be made to adequately support the thrust bearings and other equipment that may be mounted on the bulkhead or deck. (2) Sliding watertight door...

  6. 46 CFR 174.100 - Appliances for watertight and weathertight integrity.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... contributing to the strength of the bulkhead. Provision must also be made to adequately support the thrust bearings and other equipment that may be mounted on the bulkhead or deck. (2) Sliding watertight door...

  7. A Comprehensive Expedient Methods Field Manual.

    DTIC Science & Technology

    1984-09-01

    structures. " Revetments may be constructed of sandbags, sod blocks , and other expedients [17:933." Bunkers are emplacements with overhead protective...Lapland Fence............................. 75 19. Hardening: Dimensional Timber (Soil Bin) Revetment ............................................. 76...20. Hardening: Log Bulkhead (Soil Bin) Revetment ... 77 21. Hardening: Landing Mat Bulkhead (Soil Bin) Revetment

  8. 49 CFR 176.2 - Definitions.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... its sides or permanent steel bulkheads. CSC safety approval plate means the safety approval plate... structures such as tank tops, decks, bulkheads, frames, plating, or ladders, or used for filling voids or..., prefabricated, steel or wooden, closed box or container, other than a freight container, designed and used to...

  9. 77 FR 28240 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-05-14

    ... multiple site damage cracks in the radial web lap and tear strap splices of the aft pressure bulkhead at... multiple site damage cracks in the radial web lap and tear strap splices of the aft pressure bulkhead at...

  10. 46 CFR 72.01-25 - Additional structural requirements.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... CONSTRUCTION AND ARRANGEMENT Hull Structure § 72.01-25 Additional structural requirements. (a) Vessels required.... The construction of the bulkheads shall be to the satisfaction of the Commandant. (2) Steps and... deck, such bulkhead or deck shall be made structurally watertight without the use of wood, cement, or...

  11. 46 CFR 190.07-5 - Definitions.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    .... Bulkheads or decks of the A Class shall be composed of steel or equivalent metal construction, suitably stiffened and made intact with the main structure of the vessel; such as shell, structural bulkheads, and... requirements relative to the passage of flame. (e) Steel or other equivalent metal. Where the term steel or...

  12. 46 CFR 190.07-5 - Definitions.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    .... Bulkheads or decks of the A Class shall be composed of steel or equivalent metal construction, suitably stiffened and made intact with the main structure of the vessel; such as shell, structural bulkheads, and... requirements relative to the passage of flame. (e) Steel or other equivalent metal. Where the term steel or...

  13. 46 CFR 190.07-5 - Definitions.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    .... Bulkheads or decks of the A Class shall be composed of steel or equivalent metal construction, suitably stiffened and made intact with the main structure of the vessel; such as shell, structural bulkheads, and... requirements relative to the passage of flame. (e) Steel or other equivalent metal. Where the term steel or...

  14. 46 CFR 190.07-5 - Definitions.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    .... Bulkheads or decks of the A Class shall be composed of steel or equivalent metal construction, suitably stiffened and made intact with the main structure of the vessel; such as shell, structural bulkheads, and... requirements relative to the passage of flame. (e) Steel or other equivalent metal. Where the term steel or...

  15. 46 CFR 190.07-5 - Definitions.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    .... Bulkheads or decks of the A Class shall be composed of steel or equivalent metal construction, suitably stiffened and made intact with the main structure of the vessel; such as shell, structural bulkheads, and... requirements relative to the passage of flame. (e) Steel or other equivalent metal. Where the term steel or...

  16. Vacuum jacketed composite propulsion feedlines for cryogenic launch and space vehicles, volume 1. [development of glass fiber composite for strength and protection from handling damage

    NASA Technical Reports Server (NTRS)

    Spond, D. E.; Laintz, D. J.; Hall, C. A.; Dulaigh, D. E.

    1974-01-01

    Thin metallic liners that provide leak-free service in cryogenic propulsion systems are overwrapped with a glass-fiber composite that provides strength and protection from handling damage. The resultant tube is lightweight, strong, and has a low thermal flux. The inside commodity flow line and the outside vacuum jacket were fabricated using this method. Several types of vacuum jackets were fabricated and tested at operating temperatures from 294 to 21 K (+70 to minus 423 F) and operating pressure up to 69 N/cm2 (100 psi). The primary objective of the program was to develop vacuum jacket concepts, using previously developed concepts for the inner line. All major program objectives were met resulting in a design concept that is adaptable to a wide range of aerospace vehicle requirements. Major items of development included convolution of thin metallic sections up to 46 cm (18 in.) in diameter, design and fabrication of an extremely lightweight tension membrane concept for the vacuum jacket, and analytical tools that predict the failure mode and levels.

  17. 14. DETAIL VIEW OF SERVICE BRIDGE, SHOWING TRAVELLING CRANE AND ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    14. DETAIL VIEW OF SERVICE BRIDGE, SHOWING TRAVELLING CRANE AND TAINTER GATE PIER WITH RECESSES FOR EMERGENCY BULKHEADS AND BULKHEAD DOGGING DEVICES, LOOKING NORTHEAST - Upper Mississippi River 9-Foot Channel Project, Lock & Dam 26R, Alton, Madison County, IL

  18. 23. VIEW SHOWING FORECASTLE BULKHEAD, MAST STEP, AND FORWARD END ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    23. VIEW SHOWING FORECASTLE BULKHEAD, MAST STEP, AND FORWARD END OF HATCH COAMING; LETTERING INSCRIBED IN DECK BEAM READS: 'TO NS 25 54/100No. 141457' - Bugeye "Louise Travers", Intersection of Routes 2 & 4, Solomons, Calvert County, MD

  19. Lightweight thermally efficient composite feedlines, preliminary design and evaluation. [for the space tug propulsion system

    NASA Technical Reports Server (NTRS)

    Spond, D. E.; Holzworth, R. E.; Hall, C. A.

    1974-01-01

    Six liquid hydrogen feedline design concepts were developed for the cryogenic space tug. The feedlines include composite and all-metal vacuum jacketed and non-vacuum jacketed concepts, and incorporate the latest technology developments in the areas of thermally efficient vacuum jacket end closures and standoffs, radiation shields in the vacuum annulus, thermal coatings, and lightweight dissimilar metal flanged joints. The feedline design concepts were evaluated on the basis of thermal performance, weight, cost, reliability, and reusability. It is shown that composite tubing provides improved thermal performance and reduced weight for each design concept considered. Approximately 12 kg (26 lb.) can be saved by the use of composite tubing for the LH2 feedline and the other propulsion lines in the space tug.

  20. 46 CFR 28.560 - Watertight and weathertight integrity.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... opening in a deck or a bulkhead that is exposed to weather must be fitted with a weathertight or a... in a deck or a bulkhead that is exposed to weather must be fitted with a watertight coaming as... the lowest weather deck. (f) Each window and portlight located below the first deck above the lowest...

  1. 46 CFR 28.560 - Watertight and weathertight integrity.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... opening in a deck or a bulkhead that is exposed to weather must be fitted with a weathertight or a... in a deck or a bulkhead that is exposed to weather must be fitted with a watertight coaming as... the lowest weather deck. (f) Each window and portlight located below the first deck above the lowest...

  2. 46 CFR 28.560 - Watertight and weathertight integrity.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... opening in a deck or a bulkhead that is exposed to weather must be fitted with a weathertight or a... in a deck or a bulkhead that is exposed to weather must be fitted with a watertight coaming as... the lowest weather deck. (f) Each window and portlight located below the first deck above the lowest...

  3. 46 CFR 28.560 - Watertight and weathertight integrity.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... opening in a deck or a bulkhead that is exposed to weather must be fitted with a weathertight or a... in a deck or a bulkhead that is exposed to weather must be fitted with a watertight coaming as... the lowest weather deck. (f) Each window and portlight located below the first deck above the lowest...

  4. Tube coupling device

    NASA Technical Reports Server (NTRS)

    Myers, William N. (Inventor); Hein, Leopold A. (Inventor)

    1987-01-01

    A first annular ring of a tube coupling device has a keyed opening sized to fit around the nut region of a male coupling, and a second annular ring has a keyed opening sized to fit around the nut of a female coupling. Each ring has mating ratchet teeth and these rings are biased together, thereby engaging these teeth and preventing rotation of these rings. This in turn prevents the rotation of the male nut region with respect to the female nut. For tube-to-bulkhead locking, one facet of one ring is notched, and a pin is pressed into an opening in the bulkhead. This pin is sized to fit within one of the notches in the ring, thereby preventing rotation of this ring with respect to the bulkhead.

  5. 49 CFR 176.305 - General stowage requirements.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ..., protected from sources of heat, and away from potential sources of ignition. (b) Except as otherwise... following conditions exists: (i) The bulkhead or deck is covered with at least 8 cm (3 inches) of insulation on the entire area subject to heat; (ii) A temporary wooden bulkhead at least 5 cm (2 inches) thick...

  6. 49 CFR 176.305 - General stowage requirements.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ..., protected from sources of heat, and away from potential sources of ignition. (b) Except as otherwise... following conditions exists: (i) The bulkhead or deck is covered with at least 8 cm (3 inches) of insulation on the entire area subject to heat; (ii) A temporary wooden bulkhead at least 5 cm (2 inches) thick...

  7. 46 CFR 128.230 - Penetrations of hulls and watertight bulkheads-materials and pressure design.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Penetrations of hulls and watertight bulkheads-materials and pressure design. 128.230 Section 128.230 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY... § 128.230 Penetrations of hulls and watertight bulkheads—materials and pressure design. (a) Each piping...

  8. 78 FR 78703 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-27

    ... fatigue damage (WFD). This AD requires modifying the aft pressure bulkhead. The modification includes... fatigue cracking of the aft pressure bulkhead, which could result in reduced structural integrity of the... No. FAA-2013- 0706; or in person at the Docket Management Facility between 9 a.m. and 5 p.m., Monday...

  9. Using Story to Help Student Understanding of Gas Behavior

    ERIC Educational Resources Information Center

    Wiebe, Rick; Stinner, Arthur

    2010-01-01

    Students tend to have a poor understanding of the concept of gas pressure. Usually, gas pressure is taught in terms of the various formulaic gas laws. The development of the concept of gas pressure according to the early Greeks did not include the concept of a vacuum. It was not for another 2000 years that Torricelli proposed that a vacuum can…

  10. 33 CFR 110.83 - Chicago Harbor, Ill.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    .... Beginning at a point 2,120 feet South of the intersection of the North line of the Chicago Yacht Club... the first described line, passing 100 feet East of the Chicago Yacht Club bulkhead, 440 feet; thence.... Beginning at a point 145 feet North of the North line of the Chicago Yacht Club bulkhead, as constructed in...

  11. 33 CFR 110.83 - Chicago Harbor, Ill.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    .... Beginning at a point 2,120 feet South of the intersection of the North line of the Chicago Yacht Club... the first described line, passing 100 feet East of the Chicago Yacht Club bulkhead, 440 feet; thence.... Beginning at a point 145 feet North of the North line of the Chicago Yacht Club bulkhead, as constructed in...

  12. Joint High Speed Sealift (JHSS) Segmented Model Test Data Analysis and Validation of Numerical Simulations

    DTIC Science & Technology

    2012-12-01

    epoxy bonded to the shell and then the back spline is bolted to the bulkheads via flexible tabs on the bulkheads and brackets attached to the back...D. G., & Broutman, D. (2010). "Parameterization of the internal wave field generated by a submarine and its turbulent wake in a uniformly

  13. 11. Hospital Point, view to southwest from southeast bulkhead; background ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    11. Hospital Point, view to southwest from southeast bulkhead; background left to right: 1960 high-rise hospital, Medical Officer's Quarters B, and Medical Officer's Quarters C - Portsmouth Naval Hospital, Bounded by Elizabeth River, Crawford Street, Portsmouth General Hospital, Parkview Avenue, & Scotts Creek, Portsmouth, Portsmouth, VA

  14. 46 CFR 32.57-10 - Construction-TB/ALL.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... cases, having in mind the risk of fire. (b) Bulkheads of galleys, paint and lamp lockers, and emergency... accommodations and control stations from cargo, and machinery spaces and from galleys, main pantries and... apply within accommodation, service, and control spaces: (1) Corridor bulkheads in accommodation areas...

  15. Development of Non-Optimum Factors for Launch Vehicle Propellant Tank Bulkhead Weight Estimation

    NASA Technical Reports Server (NTRS)

    Wu, K. Chauncey; Wallace, Matthew L.; Cerro, Jeffrey A.

    2012-01-01

    Non-optimum factors are used during aerospace conceptual and preliminary design to account for the increased weights of as-built structures due to future manufacturing and design details. Use of higher-fidelity non-optimum factors in these early stages of vehicle design can result in more accurate predictions of a concept s actual weights and performance. To help achieve this objective, non-optimum factors are calculated for the aluminum-alloy gores that compose the ogive and ellipsoidal bulkheads of the Space Shuttle Super-Lightweight Tank propellant tanks. Minimum values for actual gore skin thicknesses and weld land dimensions are extracted from selected production drawings, and are used to predict reference gore weights. These actual skin thicknesses are also compared to skin thicknesses predicted using classical structural mechanics and tank proof-test pressures. Both coarse and refined weights models are developed for the gores. The coarse model is based on the proof pressure-sized skin thicknesses, and the refined model uses the actual gore skin thicknesses and design detail dimensions. To determine the gore non-optimum factors, these reference weights are then compared to flight hardware weights reported in a mass properties database. When manufacturing tolerance weight estimates are taken into account, the gore non-optimum factors computed using the coarse weights model range from 1.28 to 2.76, with an average non-optimum factor of 1.90. Application of the refined weights model yields non-optimum factors between 1.00 and 1.50, with an average non-optimum factor of 1.14. To demonstrate their use, these calculated non-optimum factors are used to predict heavier, more realistic gore weights for a proposed heavy-lift launch vehicle s propellant tank bulkheads. These results indicate that relatively simple models can be developed to better estimate the actual weights of large structures for future launch vehicles.

  16. 49 CFR 176.305 - General stowage requirements.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... and be stowed away from all sources of heat and ignition. (b) Except as otherwise provided in § 176.76... following conditions exists: (i) The bulkhead or deck is covered with at least 8 cm (3 inches) of insulation on the entire area subject to heat; (ii) A temporary wooden bulkhead at least 5 cm (2 inches) thick...

  17. 49 CFR 176.305 - General stowage requirements.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... and be stowed away from all sources of heat and ignition. (b) Except as otherwise provided in § 176.76... following conditions exists: (i) The bulkhead or deck is covered with at least 8 cm (3 inches) of insulation on the entire area subject to heat; (ii) A temporary wooden bulkhead at least 5 cm (2 inches) thick...

  18. 49 CFR 176.305 - General stowage requirements.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... and be stowed away from all sources of heat and ignition. (b) Except as otherwise provided in § 176.76... following conditions exists: (i) The bulkhead or deck is covered with at least 8 cm (3 inches) of insulation on the entire area subject to heat; (ii) A temporary wooden bulkhead at least 5 cm (2 inches) thick...

  19. 46 CFR 32.65-20 - Pumprooms-TB/ALL.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... bulkhead between the pumproom and the pump-engine compartment may be pierced by fixed lights, drive shaft and pump-engine control rods, provided that the shafts and rods are fitted with stuffing boxes where... their cargo pumps isolated from all sources of vapor ignition by gastight bulkheads. Totally enclosed...

  20. 46 CFR 32.65-20 - Pumprooms-TB/ALL.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... bulkhead between the pumproom and the pump-engine compartment may be pierced by fixed lights, drive shaft and pump-engine control rods, provided that the shafts and rods are fitted with stuffing boxes where... their cargo pumps isolated from all sources of vapor ignition by gastight bulkheads. Totally enclosed...

  1. 46 CFR 32.65-20 - Pumprooms-TB/ALL.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... bulkhead between the pumproom and the pump-engine compartment may be pierced by fixed lights, drive shaft and pump-engine control rods, provided that the shafts and rods are fitted with stuffing boxes where... their cargo pumps isolated from all sources of vapor ignition by gastight bulkheads. Totally enclosed...

  2. 46 CFR 32.65-20 - Pumprooms-TB/ALL.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... bulkhead between the pumproom and the pump-engine compartment may be pierced by fixed lights, drive shaft and pump-engine control rods, provided that the shafts and rods are fitted with stuffing boxes where... their cargo pumps isolated from all sources of vapor ignition by gastight bulkheads. Totally enclosed...

  3. 46 CFR 32.65-20 - Pumprooms-TB/ALL.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... bulkhead between the pumproom and the pump-engine compartment may be pierced by fixed lights, drive shaft and pump-engine control rods, provided that the shafts and rods are fitted with stuffing boxes where... their cargo pumps isolated from all sources of vapor ignition by gastight bulkheads. Totally enclosed...

  4. 46 CFR 92.07-5 - Definitions.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    .... Bulkheads or decks of the “A” Class shall be composed of steel or equivalent metal construction, suitably stiffened and made intact with the main structure of the vessel; such as shell, structural bulkheads, and... need meet no requirements relative to the passage of flame. (e) Steel or other equivalent metal. Where...

  5. 46 CFR 92.07-5 - Definitions.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    .... Bulkheads or decks of the “A” Class shall be composed of steel or equivalent metal construction, suitably stiffened and made intact with the main structure of the vessel; such as shell, structural bulkheads, and... need meet no requirements relative to the passage of flame. (e) Steel or other equivalent metal. Where...

  6. 46 CFR 92.07-5 - Definitions.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    .... Bulkheads or decks of the “A” Class shall be composed of steel or equivalent metal construction, suitably stiffened and made intact with the main structure of the vessel; such as shell, structural bulkheads, and... need meet no requirements relative to the passage of flame. (e) Steel or other equivalent metal. Where...

  7. 46 CFR 92.07-5 - Definitions.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    .... Bulkheads or decks of the “A” Class shall be composed of steel or equivalent metal construction, suitably stiffened and made intact with the main structure of the vessel; such as shell, structural bulkheads, and... need meet no requirements relative to the passage of flame. (e) Steel or other equivalent metal. Where...

  8. 46 CFR 92.07-5 - Definitions.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    .... Bulkheads or decks of the “A” Class shall be composed of steel or equivalent metal construction, suitably stiffened and made intact with the main structure of the vessel; such as shell, structural bulkheads, and... need meet no requirements relative to the passage of flame. (e) Steel or other equivalent metal. Where...

  9. 46 CFR 179.350 - Openings in the side of a vessel below the bulkhead or weather deck.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... weather deck. 179.350 Section 179.350 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED... Watertight Integrity Requirements § 179.350 Openings in the side of a vessel below the bulkhead or weather... permitted below the weather deck unless the sill of the port light is at least 760 millimeters (30 inches...

  10. 46 CFR 179.350 - Openings in the side of a vessel below the bulkhead or weather deck.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... weather deck. 179.350 Section 179.350 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED... Watertight Integrity Requirements § 179.350 Openings in the side of a vessel below the bulkhead or weather... permitted below the weather deck unless the sill of the port light is at least 760 millimeters (30 inches...

  11. 46 CFR 179.350 - Openings in the side of a vessel below the bulkhead or weather deck.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... weather deck. 179.350 Section 179.350 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED... Watertight Integrity Requirements § 179.350 Openings in the side of a vessel below the bulkhead or weather... permitted below the weather deck unless the sill of the port light is at least 760 millimeters (30 inches...

  12. 46 CFR 179.350 - Openings in the side of a vessel below the bulkhead or weather deck.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... weather deck. 179.350 Section 179.350 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED... Watertight Integrity Requirements § 179.350 Openings in the side of a vessel below the bulkhead or weather... permitted below the weather deck unless the sill of the port light is at least 760 millimeters (30 inches...

  13. 46 CFR 179.350 - Openings in the side of a vessel below the bulkhead or weather deck.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... weather deck. 179.350 Section 179.350 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED... Watertight Integrity Requirements § 179.350 Openings in the side of a vessel below the bulkhead or weather... permitted below the weather deck unless the sill of the port light is at least 760 millimeters (30 inches...

  14. Improved Aerogel Vacuum Thermal Insulation

    NASA Technical Reports Server (NTRS)

    Ruemmele, Warren P.; Bue, Grant C.

    2009-01-01

    An improved design concept for aerogel vacuum thermal-insulation panels calls for multiple layers of aerogel sandwiched between layers of aluminized Mylar (or equivalent) poly(ethylene terephthalate), as depicted in the figure. This concept is applicable to both the rigid (brick) form and the flexible (blanket) form of aerogel vacuum thermal-insulation panels. Heretofore, the fabrication of a typical aerogel vacuum insulating panel has involved encapsulation of a single layer of aerogel in poly(ethylene terephthalate) and pumping of gases out of the aerogel-filled volume. A multilayer panel according to the improved design concept is fabricated in basically the same way: Multiple alternating layers of aerogel and aluminized poly(ethylene terephthalate) are assembled, then encapsulated in an outer layer of poly(ethylene terephthalate), and then the volume containing the multilayer structure is evacuated as in the single-layer case. The multilayer concept makes it possible to reduce effective thermal conductivity of a panel below that of a comparable single-layer panel, without adding weight or incurring other performance penalties. Implementation of the multilayer concept is simple and relatively inexpensive, involving only a few additional fabrication steps to assemble the multiple layers prior to evacuation. For a panel of the blanket type, the multilayer concept, affords the additional advantage of reduced stiffness.

  15. 46 CFR 32.75-20 - Hold spaces and bulkheads-TB/ALL.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ..., 1936 § 32.75-20 Hold spaces and bulkheads—TB/ALL. In wood hull tank vessels containing independent cargo tanks for the transportation of Grade A, B, C, or D liquids, the hold spaces shall be considered... 46 Shipping 1 2013-10-01 2013-10-01 false Hold spaces and bulkheads-TB/ALL. 32.75-20 Section 32.75...

  16. 46 CFR 32.75-20 - Hold spaces and bulkheads-TB/ALL.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ..., 1936 § 32.75-20 Hold spaces and bulkheads—TB/ALL. In wood hull tank vessels containing independent cargo tanks for the transportation of Grade A, B, C, or D liquids, the hold spaces shall be considered... 46 Shipping 1 2011-10-01 2011-10-01 false Hold spaces and bulkheads-TB/ALL. 32.75-20 Section 32.75...

  17. 46 CFR 32.75-20 - Hold spaces and bulkheads-TB/ALL.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ..., 1936 § 32.75-20 Hold spaces and bulkheads—TB/ALL. In wood hull tank vessels containing independent cargo tanks for the transportation of Grade A, B, C, or D liquids, the hold spaces shall be considered... 46 Shipping 1 2010-10-01 2010-10-01 false Hold spaces and bulkheads-TB/ALL. 32.75-20 Section 32.75...

  18. 46 CFR 32.75-20 - Hold spaces and bulkheads-TB/ALL.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ..., 1936 § 32.75-20 Hold spaces and bulkheads—TB/ALL. In wood hull tank vessels containing independent cargo tanks for the transportation of Grade A, B, C, or D liquids, the hold spaces shall be considered... 46 Shipping 1 2014-10-01 2014-10-01 false Hold spaces and bulkheads-TB/ALL. 32.75-20 Section 32.75...

  19. 46 CFR 32.75-20 - Hold spaces and bulkheads-TB/ALL.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ..., 1936 § 32.75-20 Hold spaces and bulkheads—TB/ALL. In wood hull tank vessels containing independent cargo tanks for the transportation of Grade A, B, C, or D liquids, the hold spaces shall be considered... 46 Shipping 1 2012-10-01 2012-10-01 false Hold spaces and bulkheads-TB/ALL. 32.75-20 Section 32.75...

  20. 75 FR 39185 - Airworthiness Directives; The Boeing Company Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-07-08

    ... and torque checks of the hanger fittings and strut forward bulkhead of the forward engine mount and... requires repetitive inspections and torque checks of the hanger fittings and strut forward bulkhead of the... corrective actions are replacing the fasteners; removing loose fasteners; tightening all Group A [[Page 39187...

  1. Fabrication of Lower Section and Upper Forward Bulkhead Panels of the Multi-Bay Box and Panel Preparation

    NASA Technical Reports Server (NTRS)

    Velicki, Alexander; Linton, Kim; Hoffman, Krishna; Thrash, Patrick; Pickell, Robert; Turley, Robert

    2015-01-01

    NASA and the Boeing Co. have been working together under the Environmentally Responsible Aviation Project to develop stitched unitized structure for reduced weight, reduced fuel burn and reduced pollutants in the next generation of commercial aircraft. The structural concept being evaluated is PRSEUS (Pultruded Rod Stitched Efficient Unitized Structure). In the PRSEUS concept, dry carbon fabric, pultruded carbon rods, and foam are stitched together into large preforms. Then these preforms are infused with an epoxy resin into large panels in an out-of-autoclave process. These panels have stiffeners in the length-wise and width-wise directions but contain no fasteners because all stiffeners are stitched to the panel skin. This document contains a description of the fabrication of panels for use in the 30-foot-long Multi-Bay Box test article to be evaluated at NASA LaRC. The document also describes a panel which explores new PRSEUS concepts for applications beyond the Multi-Bay Box.

  2. Development tests of LOX/LH 2 tank for H-I launch vehicle

    NASA Astrophysics Data System (ADS)

    Takamatsu, H.; Imagawa, K.; Ichimaru, Y.

    H-I is a future launch vehicle of Japan with a capability of placing more than 550 kg payload into a geostationary orbit. The National Space Development Agency of Japan (NASDA) is now directing its efforts to the final development of H-I launch vehicle. H-I's high launch capability is attained by adopting a newly developed second stage with a LOX/LH 2 propulsion system. The second stage propulsion system consists of a tank and an engine. The tank is 2.5 m in diameter and 5.7 m in length and contains 8.7 tons of propellants. This tank is an integral tank with a common bulkhead which separates the tank into forward LH 2 tank and aft LOX tank. The tank is made of 2219 aluminum alloy and is insulated with sprayed polyurethane foam. The common bulkhead is made of FRP honeycomb core and aluminium alloy surface sheets. The most critical item in the development of the tank is the common bulkhead, therefore the cryogenic structural test was carried out to verify the structural integrity of the bulkhead. The structural integrity of the whole LOX/LH 2 tank was verified by the cryogenic structural test of a sub-scale tank and the room temperature structural test of a prototype tank.

  3. Compartment A19, paint & oils locker from bulkhead #9 aft ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Compartment A-19, paint & oils locker from bulkhead #9 aft to forward; wood storage shelves at center of photograph are for storing containers. Sea valve at lower right is on the starboard side. This would be opened if it was necessary to scuttle the vessel. Heavy frame marked "A-2" supports armored protective deck. (03) - USS Olympia, Penn's Landing, 211 South Columbus Boulevard, Philadelphia, Philadelphia County, PA

  4. 46 CFR 128.230 - Penetrations of hulls and watertight bulkheads-materials and pressure design.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 4 2012-10-01 2012-10-01 false Penetrations of hulls and watertight bulkheads-materials and pressure design. 128.230 Section 128.230 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OFFSHORE SUPPLY VESSELS MARINE ENGINEERING: EQUIPMENT AND SYSTEMS Materials and Pressure Design § 128.230 Penetrations of hulls and...

  5. 46 CFR 128.230 - Penetrations of hulls and watertight bulkheads-materials and pressure design.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 4 2014-10-01 2014-10-01 false Penetrations of hulls and watertight bulkheads-materials and pressure design. 128.230 Section 128.230 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OFFSHORE SUPPLY VESSELS MARINE ENGINEERING: EQUIPMENT AND SYSTEMS Materials and Pressure Design § 128.230 Penetrations of hulls and...

  6. 76 FR 59590 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-09-27

    ... web lap and tear strap splices of the aft pressure bulkhead at STA 1582 due to fatigue. We are... radial web lap and tear strap splices of the aft pressure bulkhead at station (STA) 1582 due to fatigue... prompted by reports of multiple site damage cracks in the radial web lap and tear strap splices of the aft...

  7. 46 CFR 72.05-10 - Type, location, and construction of fire control bulkheads and decks.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ..., and deckhouses shall be constructed of steel or other equivalent metal construction of appropriate scantlings. (b) The hull, superstructure, and deck houses shall be subdivided by suitable structural steel or... the deck. (1) Bulkheads or decks of the “A” Class shall be composed of steel or equivalent metal...

  8. Lunar Habitat Airlock/Suitlock

    NASA Technical Reports Server (NTRS)

    Griffin, Brand Norman

    2008-01-01

    Airlocks for lunar Extravehicular Activity (EVA) will be significantly different than previous designs. Until now, airlocks operated infrequently and only in the "clean" weightless environment, but lunar airlocks are planned to be used much more often (every other day) in a dusty, gravity environment. Concepts for airlocks were analyzed by the NASA, JSC Habitability Focus Element during recent lunar outpost studies. Three airlock types were identified; an Airlock (AL) or independent pressure vessel with one hatch to the outside and the other to the Habitat. A Suitlock (SL) which shares a pressure bulkhead with the Habitat allowing rear-entry suits to remain on the dusty side while the crew enters/exits the Habitat. The third option is the Suitport (SP) which offers direct access from the habitable volume into an externally mounted suit. The SP concept was not compared, however between the AL and SL, the AL was favored.

  9. Quantum vacuum noise in physics and cosmology.

    PubMed

    Davies, P. C. W.

    2001-09-01

    The concept of the vacuum in quantum field theory is a subtle one. Vacuum states have a rich and complex set of properties that produce distinctive, though usually exceedingly small, physical effects. Quantum vacuum noise is familiar in optical and electronic devices, but in this paper I wish to consider extending the discussion to systems in which gravitation, or large accelerations, are important. This leads to the prediction of vacuum friction: The quantum vacuum can act in a manner reminiscent of a viscous fluid. One result is that rapidly changing gravitational fields can create particles from the vacuum, and in turn the backreaction on the gravitational dynamics operates like a damping force. I consider such effects in early universe cosmology and the theory of quantum black holes, including the possibility that the large-scale structure of the universe might be produced by quantum vacuum noise in an early inflationary phase. I also discuss the curious phenomenon that an observer who accelerates through a quantum vacuum perceives a bath of thermal radiation closely analogous to Hawking radiation from black holes, even though an inertial observer registers no particles. The effects predicted raise very deep and unresolved issues about the nature of quantum particles, the role of the observer, and the relationship between the quantum vacuum and the concepts of information and entropy. (c) 2001 American Institute of Physics.

  10. Lightweight thermally efficient composite feedlines for the space tug cryogenic propulsion system

    NASA Technical Reports Server (NTRS)

    Spond, D. E.

    1975-01-01

    Six liquid hydrogen feedline design concepts were developed for the cryogenic space tug. The feedlines include composite and all-metal vacuum jacketed and nonvacuum jacketed concepts, and incorporate the latest technological developments in the areas of thermally efficient vacuum jacket end closures and standoffs, radiation shields in the vacuum annulus, thermal coatings, and lightweight dissimilar metal flanged joints. The feedline design concepts are evaluated on the basis of thermal performance, weight, cost, reliability, and reusability. Design concepts were proved in a subscale test program. Detail design was completed on the most promising composite feedline concept and an all-metal feedline. Three full scale curved composite feedlines and one all-metal feedline assembly were fabricated and subjected to a test program representative of flight hardware qualification. The test results show that composite feedline technology is fully developed. Composite feedlines are ready for space vehicle application and offer significant reduction in weights over the conventional all-metal feedlines presently used.

  11. High Energy Flywheel Containment Evaluation

    NASA Technical Reports Server (NTRS)

    Colozza, Anthony J.; Trase, Larry (Technical Monitor)

    2000-01-01

    A flywheel testing facility is being constructed at the NASA Glenn Research Center. This facility is to be used for life cycle testing of various flywheel rotors. The lifecycle testing consists of spinning a rotor from a low rpm (approx. 20,000 ) to a high rpm (approx. 60,000) and then back to the low rpm. This spin cycle will model that which the rotor will see during use. To simulate the lifetime of the rotor, the spin cycle will be performed tens of thousands of times. A typical life cycle spin test is expected to last six months. During this time the rotor will be spun through a cycle every five minutes. The test will run continuously for the six month period barring a flywheel failure. Since it is not reasonable to have the surrounding area evacuated of personnel for the duration of the testing, the flywheel facility has to be designed to withstand a flywheel rotor failure and insure that there is no danger to any personnel in the adjacent buildings or surrounding areas. In order to determine if the facility can safely contain a flywheel rotor failure an analysis of the facility in conjunction with possible flywheel failure modes was performed. This analysis is intended as a worst case evaluation of the burst liner and vacuum tank's ability to contain a failure. The test chamber consists of a cylindrical stainless steel vacuum tank, two outer steel containment rings, and a stainless steel burst liner. The stainless steel used is annealed 302, which has an ultimate strength of 620 MPa (90,000 psi). A diagram of the vacuum tank configuration is shown. The vacuum tank and air turbine will be located below ground in a pit. The tank is secured in the pit with 0.3 m (12 in.) of cement along the base and the remaining portion of the tank is surrounded by gravel up to the access ports. A 590 kg (1300 lb.) bulkhead is placed on top of the pit during operation and the complete facility is housed within a concrete structure which has 7.5 cm (3 in.) thick walls. A cutaway of the facility is shown.

  12. Research on Strain Measurements of Core Positions for the Chinese Space Station.

    PubMed

    Shen, Jingshi; Zeng, Xiaodong; Luo, Yuxiang; Cao, Changqing; Wang, Ting

    2018-06-05

    The Chinese space station is designed to carry out manned spaceflight, space science research, and so on. In serious applications, it is a common operation to inject gas into the hull, which can produce strain of the bulkhead. Accurate measurement of strain for the bulkhead is one of the key tasks in evaluating the health condition of the space station. This is the first work to perform strain detection for the Chinese space station bulkhead by using optical fiber Bragg grating. In the period of measurements, the resistance strain gauge is used as the strain standard. The measurement error of the fiber optical sensor in the circumferential direction is very small, being less than 4.52 με. However, the error in the axial direction is very large with the highest value of 28.93 με. Because the measurement error of bare fiber in the axial direction is very small, the transverse effect of the substrate of the fiber optical sensor likely plays a role. The comparison of the theoretical and experimental results of the transverse effect coefficients shows that they are fairly consistent, with values of 0.0271 and 0.0287, respectively. After the transverse effect is compensated, the strain deviation in the axial detection is smaller than 2.04 με. It is of great significance to carry out real-time health assessment for the bulkhead of the space station.

  13. A Synopsis of the Chemical/Physical Properties of Seawater

    DTIC Science & Technology

    1988-01-01

    N20 -59.5965 97.3066 24.1406 -0.058420 0.033193 -0.0051313 4 1Weiss (1970), 2Weiss ( 1971 ), 3 Wiesenburg and Guinasso (1979), 4 Weiss and Price...20 30 40 50 60 70 80 90100 Temperature ( ° C) FIG. 5. Velocity of light in pure water and seawater as a function of temperature, from Kalle (1942...of Sheet Pile Structures, from U.S. Navy Design Manual ( 1971 ). Types of structure Factors affecting deterioration Harbor bulkheads Beach bulkheads

  14. Fast acting multiple element valve

    DOEpatents

    Yang, Jefferson Y. S.; Wada, James M.

    1991-01-01

    A plurality of slide valve elements having plural axial-spaced annular parts and an internal slide are inserted into a bulkhead in a fluid conduit from a downstream side of the bulkhead, locked in place by a bayonet coupling and set screw, and project through the bulkhead into the upstream conduit. Pneumatic lines connecting the slide valve element actuator to pilot valves are brought out the throat of the valve element to the downstream side. Pilot valves are radially spaced around the exterior of the valve to permit the pneumatic lines to be made identical, thereby to minimize adverse timing tolerances in operation due to pressure variations. Ring manifolds surround the valve adjacent respective pilot valve arrangements to further reduce adverse timing tolerances due to pressure variations, the manifolds being directly connected to the respective pilot valves. Position sensors are provided the valve element slides to signal the precise time at which a slide reaches or passes through a particular point in its stroke to initiate a calibrated timing function.

  15. 13. Coal ejectors mounted on aft bulkhead of coal bunker. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    13. Coal ejectors mounted on aft bulkhead of coal bunker. Ejectors were used to flush overboard live coals and clinkers from firebed (pipe for carrying coals overboard has been removed from ejector in foreground). Coal doors from bunker appear beside ejector in foreground). Coal doors from bunker appear beside ejectors at deck; note firing shovels in background against hull. - Steamboat TICONDEROGA, Shelburne Museum Route 7, Shelburne, Chittenden County, VT

  16. Advanced Photon Source accelerator ultrahigh vacuum guide

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    Liu, C.; Noonan, J.

    1994-03-01

    In this document the authors summarize the following: (1) an overview of basic concepts of ultrahigh vacuum needed for the APS project, (2) a description of vacuum design and calculations for major parts of APS, including linac, linac waveguide, low energy undulator test line, positron accumulator ring (PAR), booster synchrotron ring, storage ring, and insertion devices, and (3) cleaning procedures of ultrahigh vacuum (UHV) components presently used at APS.

  17. Acoustic emission testing on an F/A-18 E/F titanium bulkhead

    NASA Astrophysics Data System (ADS)

    Martin, Christopher A.; Van Way, Craig B.; Lockyer, Allen J.; Kudva, Jayanth N.; Ziola, Steve M.

    1995-04-01

    An important opportunity recently transpired at Northrop Grumman Corporation to instrument an F/A - 18 E/F titanium bulkhead with broad band acoustic emission sensors during a scheduled structural fatigue test. The overall intention of this effort was to investigate the potential for detecting crack propagation using acoustic transmission signals for a large structural component. Key areas of experimentation and experience included (1) acoustic noise characterization, (2) separation of crack signals from extraneous noise, (3) source location accuracy, and (4) methods of acoustic transducer attachment. Fatigue cracking was observed and monitored by strategically placed acoustic emission sensors. The outcome of the testing indicated that accurate source location still remains enigmatic for non-specialist engineering personnel especially at this level of structural complexity. However, contrary to preconceived expectations, crack events could be readily separated from extraneous noise. A further dividend from the investigation materialized in the form of close correspondence between frequency domain waveforms of the bulkhead test specimen tested and earlier work with thick plates.

  18. Views of EVA performed during STS-6

    NASA Technical Reports Server (NTRS)

    1983-01-01

    Two STS-6 mission specialists busy near the aft bulkhead were photographed with a 70mm camera. Astronauts F. Story Musgrave (at winch device near center) and Donald H. Peterson are setting up winch operations at the aft bulkhead as a simulation for a contingency extravehicular activity (EVA). The orbital maneuvering system (OMS) pods are seen in the background (30211); Musgrave translates down the Challenger's payload bay door hinge line with a bag of latch tools. In the lower left foreground are three canisters containing three getaway special (GAS) experiments. Part of the starboard wing and OMS pod are seen in the background. The gold-foil protected object on the right is the airborne support equipment for the inertial upper stage (IUS) (30212); Peterson (starboard side) and Musgrave evaluate the handrail system on the starboard longeron and aft bulkhead during an EVA. Behind them the vertical stabilizer and OMS pods frame a portion of Mexico's state of Jalisco (30213); Musgrave sus

  19. Recent researches in airship construction II : bending stresses on an airship in flight

    NASA Technical Reports Server (NTRS)

    Naatz, H

    1924-01-01

    The first part of this report shows the differences between commercial and war airships and then goes on to show how some of the problems were solved. Their thorough investigations of these problems finally enabled the Schutte-Lanz Company to construct bulkhead diagrams for determining the buoyancy of airships, by means of which the size of each cell was established. These diagrams were derived from bulkhead diagrams employed in ship designing and are used in a similar manner.

  20. An ultra-high vacuum chamber for scattering experiments featuring in-vacuum continuous in-plane variation of the angle between entrance and exit vacuum ports

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    Englund, Carl-Johan; Agåker, Marcus, E-mail: marcus.agaker@physics.uu.se; Fredriksson, Pierre

    2015-09-15

    A concept that enables in-vacuum continuous variation of the angle between two ports in one plane has been developed and implemented. The vacuum chamber allows for measuring scattering cross sections as a function of scattering angle and is intended for resonant inelastic X-ray scattering experiments. The angle between the ports can be varied in the range of 30°-150°, while the pressure change is less than 2 × 10{sup −10} mbars.

  1. The influence of radiation shielding on reusable nuclear shuttle design

    NASA Technical Reports Server (NTRS)

    Littman, T. M.; Garcia, D.

    1972-01-01

    Alternate reusable nuclear shuttle configurations were synthesized and evaluated. Particular attention was given to design factors which reduced tank exposure to direct and scattered radiation, increased payload-engine separation, and improved self-shielding by the LH2 propellant. The most attractive RNS concept in terms of cost effectiveness consists of a single conical aft bulkhead tank with a high fineness ratio. Launch is accomplished by the INT-21 with the tank positioned in the inverted attitude. The NERVA engine is delivered to orbit separately where final stage assembly and checkout are accomplished. This approach is consistent with NERVA definition criteria and required operating procedures to support an economically viable nuclear shuttle transportation program in the post-1980 period.

  2. Applications of a new mass-driver concept

    NASA Technical Reports Server (NTRS)

    Oneill, G. K.

    1981-01-01

    A description of the operating principles and requirements of a novel mass-driver concept is presented. The design obtains acceleration of payload bucket coils by means of transverse focussing from strong, off-axis restoring forces that are produced by drive coils operating in a 'pull-only' mode. The concept offers the unprecedented possibility of operating high-performance mass-drivers entirely within the limitations of existing commercial switching devices, such as silicon-controlled rectifiers, spark gaps, vacuum-triggered arcs or vacuum mechanical switches. Representative applications of the concept described are: (1) a large-diameter magnetic lunar launcher for payloads having autonomous maneuvering; (2) an intermediate-diameter launcher with long operational life; and (3) a reaction engine for orbit transfer of large, massive objects.

  3. Surface generation and editing operations applied to structural support of aerospace vehicle fuselages. M.S. Thesis

    NASA Technical Reports Server (NTRS)

    Schwartz, Susan K.

    1992-01-01

    The Solid Modeling Aerospace Research Tool (SMART) is a computer aided design tool used in aerospace vehicle design. Modeling of structural components using SMART includes the representation of the transverse or cross-wise elements of a vehicle's fuselage, ringframes, and bulkheads. Ringframes are placed along a vehicle's fuselage to provide structural support and maintain the shape of the fuselage. Bulkheads are also used to maintain shape, but are placed at locations where substantial structural support is required. Given a Bezier curve representation of a cross sectional cut through a vehicle's fuselage and/or an internal tank, this project produces a first-guess Bezier patch representation of a ringframe or bulkhead at the cross-sectional position. The grid produced is later used in the structural analysis of the vehicle. The graphical display of the generated patches allows the user to edit patch control points in real time. Constraints considered in the patch generation include maintaining 'square-like' patches and placement of longitudinal, or lengthwise along the fuselage, structural elements called longerons.

  4. Systems integration and demonstration of advanced reusable structure for ALS

    NASA Technical Reports Server (NTRS)

    Gibbins, Martin N.

    1991-01-01

    The objective was to investigate the potential of advanced material to achieve life cycle cost (LCC) benefits for reusable structure on the advanced launch system. Three structural elements were investigated - all components of an Advanced Launch System reusable propulsion/avionics module. Leading aeroshell configurations included sandwich structure using titanium, graphite/polyimide (Gr/PI), or high-temperature aluminum (HTA) face sheets. Thrust structure truss concepts used titanium, graphite/epoxy, or silicon carbide/aluminum struts. Leading aft bulkhead concepts employed graphite epoxy and aluminum. The technical effort focused on the aeroshell because the greatest benefits were expected there. Thermal analyses show the structural temperature profiles during operation. Finite element analyses show stresses during splash-down. Weight statements and manufacturing cost estimates were prepared for calculation of LCC for each design. The Gr/PI aeroshell showed the lowest potential LCC, but the HTA aeroshell was judged to be lower risk. A technology development plan was prepared to validate the applicable structural technology.

  5. Hybrid-Wing-Body Vehicle Composite Fuselage Analysis and Case Study

    NASA Technical Reports Server (NTRS)

    Mukhopadhyay, Vivek

    2014-01-01

    Recent progress in the structural analysis of a Hybrid Wing-Body (HWB) fuselage concept is presented with the objective of structural weight reduction under a set of critical design loads. This pressurized efficient HWB fuselage design is presently being investigated by the NASA Environmentally Responsible Aviation (ERA) project in collaboration with the Boeing Company, Huntington Beach. The Pultruded Rod-Stiffened Efficient Unitized Structure (PRSEUS) composite concept, developed at the Boeing Company, is approximately modeled for an analytical study and finite element analysis. Stiffened plate linear theories are employed for a parametric case study. Maximum deflection and stress levels are obtained with appropriate assumptions for a set of feasible stiffened panel configurations. An analytical parametric case study is presented to examine the effects of discrete stiffener spacing and skin thickness on structural weight, deflection and stress. A finite-element model (FEM) of an integrated fuselage section with bulkhead is developed for an independent assessment. Stress analysis and scenario based case studies are conducted for design improvement. The FEM model specific weight of the improved fuselage concept is computed and compared to previous studies, in order to assess the relative weight/strength advantages of this advanced composite airframe technology

  6. A Numerical Analysis of Electromagnetic Scattering from Two-Dimensional Edge Terminations

    NASA Technical Reports Server (NTRS)

    Gray, B. E.; Dominek, A. K.; Wang, N.

    1995-01-01

    Several techniques that influence the low frequency scattering from penetrable edge terminations are evaluated using a hybrid finite element and boundary element method code. The edge terminations consist of a dielectric skin forming an exterior shape with an internal conducting bulkhead. Some of the techniques considered are bulkhead shaping, internal material loading, placement of resistive cards, and the placement of lossy dielectric material rods. The intent of the various treatments is to find a combination or combinations that influence(s) the backscattered field to acceptable levels over a range of frequencies for both transverse magnetic and transverse electric polarizations.

  7. Convenient mounting method for electrical measurements of thin samples

    NASA Technical Reports Server (NTRS)

    Matus, L. G.; Summers, R. L.

    1986-01-01

    A method for mounting thin samples for electrical measurements is described. The technique is based on a vacuum chuck concept in which the vacuum chuck simultaneously holds the sample and established electrical contact. The mounting plate is composed of a glass-ceramic insulating material and the surfaces of the plate and vacuum chuck are polished. The operation of the vacuum chuck is examined. The contacts on the sample and mounting plate, which are sputter-deposited through metal masks, are analyzed. The mounting method was utilized for van der Pauw measurements.

  8. Under Pressure: Activities with a Vacuum Pump (and Some Marshmallows) Help Students Learn about Pressure.

    ERIC Educational Resources Information Center

    Galus, Pamela

    2002-01-01

    Introduces a science demonstration that illustrates the effects of pressure and gravity on humans using a marshmallow man and a vacuum pump. Demonstrates the same concept with shaving cream, balloons, and boiling water without raising temperature. (YDS)

  9. Triggering vacuum capillaries for pneumatic pumping and metering liquids in point-of-care immunoassays.

    PubMed

    Weng, Kuo-Yao; Chou, Nien-Jen; Cheng, Jya-Wei

    2008-07-01

    An innovative vacuum capillary pneumatic actuation concept that can be used for point-of-care testing has been investigated. The vacuum glass capillaries are encapsulated within a laminated pouch and incorporated into the fluidic card. Vacuum glass capillaries broken by external force such as finger pressure, generate the pneumatic forces to induce liquid flow in the fluidic system. The sizes of vacuum capillary play a vital role in the pumping and metering functions of the system. The luteinizing hormone (LH) chromatographic immunoassay performances in the fluidic cards show consistency comparable to that obtained by manual micropipetting. The vacuum capillary pneumatic actuation will be applied in other complex handling step bioassays and lab-on-a-chip devices.

  10. Use of space ultra-vacuum for high quality semiconductor thin film growth

    NASA Technical Reports Server (NTRS)

    Ignatiev, A.; Sterling, M.; Sega, R. M.

    1992-01-01

    The utilization of space for materials processing is being expanded through a unique concept of epitaxial thin film growth in the ultra-vacuum of low earth orbit (LEO). This condition can be created in the wake of an orbiting space vehicle; and assuming that the vehicle itself does not pertub the environment, vacuum levels of better than 10 exp -14 torr can be attained. This vacuum environment has the capacity of greatly enhancing epitaxial thin film growth and will be the focus of experiments conducted aboard the Wake Shield Facility (WSF) currently being developed by the Space Vacuum Epitaxy Center (SVEC), Industry, and NASA.

  11. Modification of one man life raft

    NASA Technical Reports Server (NTRS)

    Soter, E. J. (Inventor)

    1974-01-01

    A one man inflatable life raft is described. The raft has an inflatable tube perimetrically bounding the occupant receiving space with a flexible floor member. A zippered opening in the floor allows entry and facilitates the use of a constant diameter tube. An airtight fabric bulkhead divides the peripheral tube longitudinally into inflatable tube sections, where if either tube section were punctured, the bulkhead would move into the punctured section to substitute for the punctured wall portion and maintain the inflatable volume of the tube. The floor member is attached to the central portion of the tube wall so that either side of the raft can be the up side.

  12. Dynamics of the Vacuum and Casimir Analogs to the Hydrogen Atom

    NASA Technical Reports Server (NTRS)

    White, Harold; Vera, Jerry; Bailey, Paul; March, Paul; Lawrence, Tim; Sylvester, Andre; Brady, David

    2015-01-01

    This paper will discuss the current viewpoint of the vacuum state and explore the idea of a "natural" vacuum as opposed to immutable, non-degradable vacuum. This concept will be explored for all primary quantum numbers to show consistency with observation at the level of Bohr theory. A comparison with the Casimir force per unit area will be made, and an explicit function for the spatial variation of the vacuum density around the atomic nucleus will be derived. This explicit function will be numerically modeled using the industry multi-physics tool, COMSOL(trademark), and the eigenfrequencies for the n = 1 to n = 7 states will be found and compared to expectation.

  13. Load Tests on a Stiffened Circular Cylindrical Shell

    NASA Technical Reports Server (NTRS)

    Schapitz, E; Krumling, G

    1938-01-01

    The present report describes tests in which the stress distribution may be determined in a stiffened circular cylindrical shell loaded longitudinally at four symmetrically situated points. As being of particular importance are the cases investigated of groups of bending and arching or convexing forces, respectively. From the stress measurements on the longitudinal stiffeners, the shear stresses and the bulkhead ring stresses in the skin could be evaluated. These measurements showed that the "simple shear field" used in theoretical computations in which all normal stresses in the skin are neglected, must be extended by the addition of the transverse or circumferential stresses if the bulkhead rings are not riveted to the skin.

  14. DOE Office of Scientific and Technical Information (OSTI.GOV)

    Restivo, M.

    SRNL Environmental and Chemical Process Technology (E&CPT) was requested to perform testing of vacuum pumps per a verbal request from the Customer, SRNL Hydrogen Processing Technology. Tritium Operations is currently having difficulties procuring the Normetex™® Model 15 m 3/hr (9 CFM) vacuum pump (formerly Normetex Pompes, now Eumeca SARL). One possible solution proposed by Hydrogen Processing Technology personnel is to use two Senior Aerospace Metal Bellows MB-601 vacuum pumps piped with the heads in series, and the pumps in series (Figure 1 below). This memorandum documents the ultimate vacuum testing that was performed to determine if this concept was amore » viable alternate vacuum pump strategy. This testing dovetails with previous pump evaluations documented in references 1 and 2.« less

  15. Solid Modeling of Crew Exploration Vehicle Structure Concepts for Mass Optimization

    NASA Technical Reports Server (NTRS)

    Mukhopadhyay, Vivek

    2006-01-01

    Parametric solid and surface models of the crew exploration vehicle (CEV) command module (CM) structure concepts are developed for rapid finite element analyses, structural sizing and estimation of optimal structural mass. The effects of the structural configuration and critical design parameters on the stress distribution are visualized, examined to arrive at an efficient design. The CM structural components consisted of the outer heat shield, inner pressurized crew cabin, ring bulkhead and spars. For this study only the internal cabin pressure load case is considered. Component stress, deflection, margins of safety and mass are used as design goodness criteria. The design scenario is explored by changing the component thickness parameters and materials until an acceptable design is achieved. Aluminum alloy, titanium alloy and an advanced composite material properties are considered for the stress analysis and the results are compared as a part of lessons learned and to build up a structural component sizing knowledge base for the future CEV technology support. This independent structural analysis and the design scenario based optimization process may also facilitate better CM structural definition and rapid prototyping.

  16. Composite Structure Modeling and Analysis of Advanced Aircraft Fuselage Concepts

    NASA Technical Reports Server (NTRS)

    Mukhopadhyay, Vivek; Sorokach, Michael R.

    2015-01-01

    NASA Environmentally Responsible Aviation (ERA) project and the Boeing Company are collabrating to advance the unitized damage arresting composite airframe technology with application to the Hybrid-Wing-Body (HWB) aircraft. The testing of a HWB fuselage section with Pultruded Rod Stitched Efficient Unitized Structure (PRSEUS) construction is presently being conducted at NASA Langley. Based on lessons learned from previous HWB structural design studies, improved finite-element models (FEM) of the HWB multi-bay and bulkhead assembly are developed to evaluate the performance of the PRSEUS construction. In order to assess the comparative weight reduction benefits of the PRSEUS technology, conventional cylindrical skin-stringer-frame models of a cylindrical and a double-bubble section fuselage concepts are developed. Stress analysis with design cabin-pressure load and scenario based case studies are conducted for design improvement in each case. Alternate analysis with stitched composite hat-stringers and C-frames are also presented, in addition to the foam-core sandwich frame and pultruded rod-stringer construction. The FEM structural stress, strain and weights are computed and compared for relative weight/strength benefit assessment. The structural analysis and specific weight comparison of these stitched composite advanced aircraft fuselage concepts demonstrated that the pressurized HWB fuselage section assembly can be structurally as efficient as the conventional cylindrical fuselage section with composite stringer-frame and PRSEUS construction, and significantly better than the conventional aluminum construction and the double-bubble section concept.

  17. Siphonic Concepts Examined: A Carbon Dioxide Gas Siphon and Siphons in Vacuum

    ERIC Educational Resources Information Center

    Ramette, Joshua J.; Ramette, Richard W.

    2011-01-01

    Misconceptions of siphon action include assumptions that intermolecular attractions play a key role and that siphons will operate in a vacuum. These are belied by the siphoning of gaseous carbon dioxide and behaviour of siphons under reduced pressure. These procedures are suitable for classroom demonstrations. The principles of siphon action are…

  18. Modeling of Global BEAM Structure for Evaluation of MMOD Impacts to Support Development of a Health Monitoring System

    NASA Technical Reports Server (NTRS)

    Lyle, Karen H.; Vassilakos, Gregory J.

    2015-01-01

    This report summarizes the initial modeling of the global response of the Bigelow Expandable Activity Module (BEAM) to micrometeorite and orbital debris(MMOD) impacts using a structural, nonlinear, transient dynamic, finite element code. These models complement the on-orbit deployment of the Distributed Impact Detection System (DIDS) to support structural health monitoring studies. Two global models were developed. The first focused exclusively on impacts on the soft-goods (fabric-envelop) portion of BEAM. The second incorporates the bulkhead to support understanding of bulkhead impacts. These models were exercised for random impact locations and responses monitored at the on-orbit sensor locations. The report concludes with areas for future study.

  19. Quiet Spike Build-Up Ground Vibration Testing Approach

    NASA Technical Reports Server (NTRS)

    Spivey, Natalie D.; Herrera, Claudia Y.; Truax, Roger; Pak, Chan-gi; Freund, Donald

    2007-01-01

    NASA's Dryden Flight Research Center uses a modified F-15B (836) aircraft as a testbed for a variety of flight research:experiments mounted underneath the aircraft fuselage. The F-15B was selected to fly Gulfstream Aerospace Corporation's (GAC)QuietSpike(TM)(QS) project; however, this experiment is very unique and unlike any of the previous testbed experiments flown on the F-15B. It involves the addition of a relatively long quiet spike boom attached to the radar bulkhead of the aircraft. This QS experiment is a stepping stone to airframe structural morphing technologies designed to mitigate sonic born strength of business jets over land. The QS boom is a concept in Which an aircraft's front-end would be extended prior to supersonic acceleration. This morphing would effectively lengthen the aircraft, reducing peak sonic boom amplitude, but is also expected to partition the otherwise strong bow shock into a series of reduced-strength, non-coalescing shocklets. Prior to flying the Quietspike(TM) experiment on the F-15B aircraft several ground vibration tests (GVT) were required in order to understand the QS modal characteristics and coupling effects with the F-15B. However, due to the project's late hardware delivery of the QS and the intense schedule, a "traditional" GVT of the mated F-1513 Quietspike(tm) ready-for-flight configuration would not have left sufficient time available for the finite element model update and flutter analyses before flight testing. Therefore, a "nontraditional" ground vibration testing approach was taken. The objective of the QuietSpike (TM) build-up ground testing approach was to ultimately obtain confidence in the F-15B Quietspike(TM) finite element model (FEM) to be used for the flutter analysis. In order to obtain the F15B QS FEM with reliable foundation stiffness between the QS and the F-15B radar bulkhead as well as QS modal characteristics, several different GVT configurations were performed. EAch of the four GVT's performed had a specific objective. The overall intent was to provide adequate data which would replicate a "traditional" F-15B QS GVT with actual ready-for-flight hardware. NASA Dryden was tasked with the conduct of the 1st, 2nd and 4th GVT and the 3rd GVT was GAC's responsibility. In order for this build-up GVT approach to be feasible, it was absolutely critical that each GVT configuration matched as closely as possible the connection interface configuration between the and aircraft bulkhead.

  20. Vacuum-assisted drainage in cardiopulmonary bypass: advantages and disadvantages.

    PubMed

    Carvalho Filho, Elio Barreto de; Marson, Fernando Augusto de Lima; Costa, Loredana Nilkenes Gomes da; Antunes, Nilson

    2014-01-01

    Systematic review of vacuum assisted drainage in cardiopulmonary bypass, demonstrating its advantages and disadvantages, by case reports and evidence about its effects on microcirculation. We conducted a systematic search on the period 1997-2012, in the databases PubMed, Medline, Lilacs and SciELO. Of the 70 selected articles, 26 were included in the review. Although the vacuum assisted drainage has significant potential for complications and requires appropriate technology and professionalism, prevailed in literature reviewed the concept that vacuum assisted drainage contributed in reducing the rate of transfusions, hemodilutions, better operative field, no significant increase in hemolysis, reduced complications surgical, use of lower prime and of smaller diameter cannulas.

  1. Review of recent developments and applications in low-pressure (vacuum outlet) gas chromatography

    USDA-ARS?s Scientific Manuscript database

    The concept of low pressure (LP) vacuum outlet gas chromatography (GC) was introduced more than 50 years ago, but it was not until the 2000s that its theoretical applicability to fast analysis of GC-amenable chemicals was realized. In practice, LPGC is implemented by placing the outlet of a short, ...

  2. Effectiveness of some recent antimicrobial packaging concepts.

    PubMed

    Vermeiren, L; Devlieghere, F; Debevere, J

    2002-01-01

    A new type of active packaging is the combination of food-packaging materials with antimicrobial substances to control microbial surface contamination of foods. For both migrating and non-migrating antimicrobial materials, intensive contact between the food product and packaging material is required and therefore potential food applications include especially vacuum or skin-packaged products, e.g. vacuum-packaged meat, fish, poultry or cheese. Several antimicrobial compounds have been combined with different types of carriers (plastic and rubber articles, paper-based materials, textile fibrils and food-packaging materials). Until now, however, few antimicrobial concepts have found applications as a food-packaging material. Antimicrobial packaging materials cannot legally be used in the EU at the moment. The potential use would require amendments of several different legal texts involving areas such as food additives, food packaging, hygiene, etc. The main objective of this paper is to provide a state of the art about the different types of antimicrobial concepts, their experimental development and commercialization, and to present a case study summarizing the results of investigations on the feasibility of a low-density polyethylene (LDPE)-film containing triclosan to inhibit microbial growth on food surfaces and consequently prolong shelf-life or improve microbial food safety. In contrast with the strong antimicrobial effect in in-vitro simulated vacuum-packaged conditions against the psychrotrophic food pathogen L. monocytogenes, the 1000 mg kg(-1) containing triclosan film did not effectively reduce spoilage bacteria and growth of L. monocytogenes on refrigerated vacuum-packaged chicken breasts stored at 7 degrees C.

  3. Common-pull, multiple-push, vacuum-activated telescope mirror cell.

    PubMed

    Ruiz, Elfego; Sohn, Erika; Salas, Luis; Luna, Esteban; Araiza-Durán, José A

    2014-11-20

    A new concept for push-pull active optics is presented, where the push-force is provided by means of individual airbag type actuators and a common force in the form of a vacuum is applied to the entire back of the mirror. The vacuum provides the pull-component of the system, in addition to gravity. Vacuum is controlled as a function of the zenithal angle, providing correction for the axial component of the mirror's weight. In this way, the push actuators are only responsible for correcting mirror deformations, as well as for supporting the axial mirror weight at the zenith, allowing for a uniform, full dynamic-range behavior of the system along the telescope's pointing range. This can result in the ability to perform corrections of up to a few microns for low-order aberrations. This mirror support concept was simulated using a finite element model and was tested experimentally at the 2.12 m San Pedro Mártir telescope. Advantages such as stress-free attachments, lighter weight, large actuator area, lower system complexity, and lower required mirror-cell stiffness could make this a method to consider for future large telescopes.

  4. EC02-0188-22

    NASA Image and Video Library

    2002-07-12

    Technicians at General Atomics Aeronautical Systems, Inc., (GA-ASI) facility at Adelanto, Calif., carefully thread control lines through a bulkhead during engine installation on NASA's Altair aircraft.

  5. The Press, the Government, and the Ethics Vacuum.

    ERIC Educational Resources Information Center

    Merrill, John C.

    Immanuel Kant's idea of a will to do the right thing--to be ethical--is essentially a dead concept with both press and government. The reasons for this "ethics vacuum" are two-fold: the foundations of ethics in both circles are vague, confusing, and beset by relativism and pragmatism so that no system of ethics ever really coalesces; and neither…

  6. Vacuum-assisted drainage in cardiopulmonary bypass: advantages and disadvantages

    PubMed Central

    de Carvalho Filho, Élio Barreto; Marson, Fernando Augusto de Lima; da Costa, Loredana Nilkenes Gomes; Antunes, Nilson

    2014-01-01

    Systematic review of vacuum assisted drainage in cardiopulmonary bypass, demonstrating its advantages and disadvantages, by case reports and evidence about its effects on microcirculation. We conducted a systematic search on the period 1997-2012, in the databases PubMed, Medline, Lilacs and SciELO. Of the 70 selected articles, 26 were included in the review. Although the vacuum assisted drainage has significant potential for complications and requires appropriate technology and professionalism, prevailed in literature reviewed the concept that vacuum assisted drainage contributed in reducing the rate of transfusions, hemodilutions, better operative field, no significant increase in hemolysis, reduced complications surgical, use of lower prime and of smaller diameter cannulas. PMID:25140478

  7. Advanced Space Suit Insulation Feasibility Study

    NASA Technical Reports Server (NTRS)

    Trevino, Luis A.; Orndoff, Evelyne S.

    2000-01-01

    For planetary applications, the space suit insulation has unique requirements because it must perform in a dynamic mode to protect humans in the harsh dust, pressure and temperature environments. Since the presence of a gaseous planetary atmosphere adds significant thermal conductance to the suit insulation, the current multi-layer flexible insulation designed for vacuum applications is not suitable in reduced pressure planetary environments such as that of Mars. Therefore a feasibility study has been conducted at NASA to identify the most promising insulation concepts that can be developed to provide an acceptable suit insulation. Insulation concepts surveyed include foams, microspheres, microfibers, and vacuum jackets. The feasibility study includes a literature survey of potential concepts, an evaluation of test results for initial insulation concepts, and a development philosophy to be pursued as a result of the initial testing and conceptual surveys. The recommended focus is on microfibers due to the versatility of fiber structure configurations, the wide choice of fiber materials available, the maturity of the fiber processing industry, and past experience with fibers in insulation applications

  8. Cosmic vacuum energy decay and creation of cosmic matter.

    PubMed

    Fahr, Hans-Jörg; Heyl, Michael

    2007-09-01

    In the more recent literature on cosmological evolutions of the universe, the cosmic vacuum energy has become a nonrenouncable ingredient. The cosmological constant Lambda, first invented by Einstein, but later also rejected by him, presently experiences an astonishing revival. Interestingly enough, it acts like a constant vacuum energy density would also do. Namely, it has an accelerating action on cosmic dynamics, without which, as it appears, presently obtained cosmological data cannot be conciliated with theory. As we are going to show in this review, however, the concept of a constant vacuum energy density is unsatisfactory for very basic reasons because it would claim for a physical reality that acts upon spacetime and matter dynamics without itself being acted upon by spacetime or matter.

  9. Preventing Clogging In A Vacuum Plasma Spray Gun

    NASA Technical Reports Server (NTRS)

    Krotz, Phillip D.; Daniel, Ronald L., Jr.; Davis, William M.

    1994-01-01

    Modification of powder-injection ports enables lengthy, high-temperature deposition operations. Graphite inserts prevent clogging of ports through which copper powder injected into vacuum plasma spray (VPS) gun. Graphite liners eliminate need to spend production time refurbishing VPS gun, reducing cost of production and increasing productivity. Concept also applied to other material systems used for net-shape fabrication via VPS.

  10. Commercial aspects of epitaxial thin film growth in outer space

    NASA Technical Reports Server (NTRS)

    Ignatiev, Alex; Chu, C. W.

    1988-01-01

    A new concept for materials processing in space exploits the ultra vacuum component of space for thin film epitaxial growth. The unique low earth orbit space environment is expected to yield 10 to the -14th torr or better pressures, semiinfinite pumping speeds and large ultra vacuum volume (about 100 cu m) without walls. These space ultra vacuum properties promise major improvement in the quality, unique nature, and the throughput of epitaxially grown materials especially in the area of semiconductors for microelectronics use. For such thin film materials there is expected a very large value added from space ultra vacuum processing, and as a result the application of the epitaxial thin film growth technology to space could lead to major commercial efforts in space.

  11. Carbon Dioxide Blast/Vacuum Demilitarization

    DTIC Science & Technology

    1992-08-01

    through a venturi at the opening of the nozzle. The nozzle accelerates the pellets up to supersonic speeds. CONCEPT ORIGINATION: The concept for a...sent td the treatment plant. The kettle also requires a hood to capture the vapor rising from it, which uses a sophisticated air scrubber to remove

  12. Vacuum mechatronics

    NASA Technical Reports Server (NTRS)

    Hackwood, Susan; Belinski, Steven E.; Beni, Gerardo

    1989-01-01

    The discipline of vacuum mechatronics is defined as the design and development of vacuum-compatible computer-controlled mechanisms for manipulating, sensing and testing in a vacuum environment. The importance of vacuum mechatronics is growing with an increased application of vacuum in space studies and in manufacturing for material processing, medicine, microelectronics, emission studies, lyophylisation, freeze drying and packaging. The quickly developing field of vacuum mechatronics will also be the driving force for the realization of an advanced era of totally enclosed clean manufacturing cells. High technology manufacturing has increasingly demanding requirements for precision manipulation, in situ process monitoring and contamination-free environments. To remove the contamination problems associated with human workers, the tendency in many manufacturing processes is to move towards total automation. This will become a requirement in the near future for e.g., microelectronics manufacturing. Automation in ultra-clean manufacturing environments is evolving into the concept of self-contained and fully enclosed manufacturing. A Self Contained Automated Robotic Factory (SCARF) is being developed as a flexible research facility for totally enclosed manufacturing. The construction and successful operation of a SCARF will provide a novel, flexible, self-contained, clean, vacuum manufacturing environment. SCARF also requires very high reliability and intelligent control. The trends in vacuum mechatronics and some of the key research issues are reviewed.

  13. Improving Vacuum Cleaners

    NASA Technical Reports Server (NTRS)

    1997-01-01

    Under a Space Act Agreement between the Kirby company and Lewis Research Center, NASA technology was applied to a commercial vacuum cleaner product line. Kirby engineers were interested in advanced operational concepts, such as particle flow behavior and vibration, critical factors to improve vacuum cleaner performance. An evaluation of the company 1994 home care system, the Kirby G4, led to the refinement of the new G5 and future models. Under the cooperative agreement, Kirby had access to Lewis' holography equipment, which added insight into how long a vacuum cleaner fan would perform, as well as advanced computer software that can simulate the flow of air through fans. The collaboration resulted in several successes including fan blade redesign and continuing dialogue on how to improve air-flow traits in various nozzle designs.

  14. 46 CFR 153.209 - Bilge pumping systems.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... BULK LIQUID, LIQUEFIED GAS, OR COMPRESSED GAS HAZARDOUS MATERIALS Design and Equipment General Vessel... spaces separated from cargo tanks by only a single bulkhead must be entirely within the locations allowed...

  15. 46 CFR 153.209 - Bilge pumping systems.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... BULK LIQUID, LIQUEFIED GAS, OR COMPRESSED GAS HAZARDOUS MATERIALS Design and Equipment General Vessel... spaces separated from cargo tanks by only a single bulkhead must be entirely within the locations allowed...

  16. 46 CFR 153.209 - Bilge pumping systems.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... BULK LIQUID, LIQUEFIED GAS, OR COMPRESSED GAS HAZARDOUS MATERIALS Design and Equipment General Vessel... spaces separated from cargo tanks by only a single bulkhead must be entirely within the locations allowed...

  17. 46 CFR 153.209 - Bilge pumping systems.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... BULK LIQUID, LIQUEFIED GAS, OR COMPRESSED GAS HAZARDOUS MATERIALS Design and Equipment General Vessel... spaces separated from cargo tanks by only a single bulkhead must be entirely within the locations allowed...

  18. 46 CFR 153.209 - Bilge pumping systems.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... BULK LIQUID, LIQUEFIED GAS, OR COMPRESSED GAS HAZARDOUS MATERIALS Design and Equipment General Vessel... spaces separated from cargo tanks by only a single bulkhead must be entirely within the locations allowed...

  19. A Novel System for Correction of Relative Angular Displacement between Airborne Platform and UAV in Target Localization

    PubMed Central

    Liu, Chenglong; Liu, Jinghong; Song, Yueming; Liang, Huaidan

    2017-01-01

    This paper provides a system and method for correction of relative angular displacements between an Unmanned Aerial Vehicle (UAV) and its onboard strap-down photoelectric platform to improve localization accuracy. Because the angular displacements have an influence on the final accuracy, by attaching a measuring system to the platform, the texture image of platform base bulkhead can be collected in a real-time manner. Through the image registration, the displacement vector of the platform relative to its bulkhead can be calculated to further determine angular displacements. After being decomposed and superposed on the three attitude angles of the UAV, the angular displacements can reduce the coordinate transformation errors and thus improve the localization accuracy. Even a simple kind of method can improve the localization accuracy by 14.3%. PMID:28273845

  20. A Novel System for Correction of Relative Angular Displacement between Airborne Platform and UAV in Target Localization.

    PubMed

    Liu, Chenglong; Liu, Jinghong; Song, Yueming; Liang, Huaidan

    2017-03-04

    This paper provides a system and method for correction of relative angular displacements between an Unmanned Aerial Vehicle (UAV) and its onboard strap-down photoelectric platform to improve localization accuracy. Because the angular displacements have an influence on the final accuracy, by attaching a measuring system to the platform, the texture image of platform base bulkhead can be collected in a real-time manner. Through the image registration, the displacement vector of the platform relative to its bulkhead can be calculated to further determine angular displacements. After being decomposed and superposed on the three attitude angles of the UAV, the angular displacements can reduce the coordinate transformation errors and thus improve the localization accuracy. Even a simple kind of method can improve the localization accuracy by 14.3%.

  1. 46 CFR 133.120 - Launching stations.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... station in the forward part of the OSV must— (1) Be located aft of the collision bulkhead in a sheltered position; and (2) Have a launching appliance approved as being of sufficient strength for forward...

  2. 46 CFR 133.120 - Launching stations.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... station in the forward part of the OSV must— (1) Be located aft of the collision bulkhead in a sheltered position; and (2) Have a launching appliance approved as being of sufficient strength for forward...

  3. Antimatter Production at a Potential Boundary

    NASA Technical Reports Server (NTRS)

    LaPointe, Michael R.; Reddy, Dhanireddy (Technical Monitor)

    2001-01-01

    Current antiproton production techniques rely on high-energy collisions between beam particles and target nuclei to produce particle and antiparticle pairs, but inherently low production and capture efficiencies render these techniques impractical for the cost-effective production of antimatter for space propulsion and other commercial applications. Based on Dirac's theory of the vacuum field, a new antimatter production concept is proposed in which particle-antiparticle pairs are created at the boundary of a steep potential step formed by the suppression of the local vacuum fields. Current antimatter production techniques are reviewed, followed by a description of Dirac's relativistic quantum theory of the vacuum state and corresponding solutions for particle tunneling and reflection from a potential barrier. The use of the Casimir effect to suppress local vacuum fields is presented as a possible technique for generating the sharp potential gradients required for particle-antiparticle pair creation.

  4. A new approach for performing contamination control bakeouts in JPL thermal vacuum test chambers

    NASA Technical Reports Server (NTRS)

    Johnson, Kenneth R.; Taylor, Daniel M.; Lane, Robert W.; Cortez, Maximo G.; Anderson, Mark R.

    1992-01-01

    Contamination control requirements for the Wide Field/Planetary Camera II (WF/PC II) are necessarily stringent to protect against post-launch contamination of the sensitive optical surfaces, particularly the cold charge coupled device (CCD) imaging surfaces. Typically, thermal vacuum test chambers have employed a liquid nitrogen (LN2) cold trap to collect outgassed contaminants. This approach has the disadvantage of risking recontamination of the test article from shroud offgassing during post-test warmup of the chamber or from any shroud warming of even a few degrees during the bakeout process. By using an enclave, essentially a chamber within a chamber, configured concentrically and internally within an LN2 shroud, a method was developed, based on a design concept by Taylor, for preventing recontamination of test articles during bakeouts and subsequent post-test warmup of the vacuum chamber. Enclaves for testing WF/PC II components were designed and fabricated, then installed in three of JPL's Environmental Test Lab chambers. The design concepts, operating procedures, and test results of this development are discussed.

  5. Apollo experience report: Manned thermal-vacuum testing of spacecraft

    NASA Technical Reports Server (NTRS)

    Mclane, J. C., Jr.

    1974-01-01

    Manned thermal-vacuum tests of the Apollo spacecraft presented many first-time problems in the areas of test philosophy, operational concepts, and program implementation. The rationale used to resolve these problems is explained and examined critically in view of actual experience. The series of 12 tests involving 1517 hours of chamber operating time resulted in the disclosure of numerous equipment and procedural deficiencies of significance to the flight mission. Test experience and results in view of subsequent flight experience confirmed that thermal-vacuum testing of integrated manned spacecraft provides a feasible, cost-effective, and safe technique with which to obtain maximum confidence in spacecraft flight worthiness early in the program.

  6. Cavitation-based hydro-fracturing technique for geothermal reservoir stimulation

    DOEpatents

    Wang, Jy-An John; Wang, Hong; Ren, Fei; Cox, Thomas S.

    2017-02-21

    A rotary shutter valve 500 is used for geothermal reservoir stimulation. The valve 500 includes a pressure chamber 520 for holding a working fluid (F) under pressure. A rotatable shutter 532 is turned with a powering device 544 to periodically align one or more windows 534 with one or more apertures 526 in a bulkhead 524. When aligned, the pressurized working fluid (F) flows through the bulkhead 524 and enters a pulse cavity 522, where it is discharged from the pulse cavity 522 as pressure waves 200. The pressure wave propagation 200 and eventual collapse of the bubbles 202 can be transmitted to a target rock surface 204 either in the form of a shock wave 206, or by micro jets 208, depending on the bubble-surface distance. Once cavitation at the rock face begins, fractures are initiated in the rock to create a network of micro-fissures for enhanced heat transfer.

  7. Cryogenic Testing of Different Seam Concepts for Multilayer Insulation Systems

    NASA Technical Reports Server (NTRS)

    Johnson, Wesley L.; Fesmire, J. E.

    2009-01-01

    Recent testing in a cylindrical, comparative cryostat at the Cryogenics Test Laboratory has focused on various seam concepts for multilayer insulation systems. Three main types of seams were investigated: straight overlap, fold-over, and roll wrapped. Each blanket was comprised of 40 layer pairs of reflector and spacer materials. The total thickness was approximately 12.5-mm, giving an average layer density of 32 layers per centimeter. The blankets were tested at high vacuum, soft vacuum, and no vacuum using liquid nitrogen to maintain the cold boundary temperature at 77 K. Test results show that all three seam concepts are all close in thermal performance; however the fold-over method provides the lowest heat flux. For the first series of tests, seams were located 120 degrees around the circumference of the cryostat from the previous seam. This technique appears to have lessened the degradation of the blanket due to the seams. In a follow-on test, a 20 layer blanket was tested in a roll wrapped configuration and then cut down the side of the cylinder, taped together, and re-tested. This test result shows the thermal performance impact of having the seams all in one location versus having the seams clocked around the vessel. This experimental investigation indicates that the method of joining the seams in multilayer insulation systems is not as critical as the quality of the installation process.

  8. Evaluation of a Prototype Hybrid Vacuum Pump to Provide Vacuum-Assisted Suspension for Above-Knee Prostheses

    PubMed Central

    Major, Matthew J.; Caldwell, Ryan; Fatone, Stefania

    2015-01-01

    Vacuum-assisted suspension (VAS) of prosthetic sockets utilizes a pump to evacuate air from between the prosthetic liner and socket, and are available as mechanical or electric systems. This technical note describes a hybrid pump that benefits from the advantages of mechanical and electric systems, and evaluates a prototype as proof-of-concept. Cyclical bench testing of the hybrid pump mechanical system was performed using a materials testing system to assess the relationship between compression cycles and vacuum pressure. Phase 1 in vivo testing of the hybrid pump was performed by an able-bodied individual using prosthesis simulator boots walking on a treadmill, and phase 2 involved an above-knee prosthesis user walking with the hybrid pump and a commercial electric pump for comparison. Bench testing of 300 compression cycles produced a maximum vacuum of 24 in-Hg. In vivo testing demonstrated that the hybrid pump continued to pull vacuum during walking, and as opposed to the commercial electric pump, did not require reactivation of the electric system during phase 2 testing. The novelty of the hybrid pump is that while the electric system provides rapid, initial vacuum suspension, the mechanical system provides continuous air evacuation while walking to maintain suspension without reactivation of the electric system, thereby allowing battery power to be reserved for monitoring vacuum levels. PMID:27462383

  9. 30 CFR 57.4760 - Shaft mines.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... heat, smoke, or toxic fumes in the event of a fire. (b) If the destruction of any bulkhead on an..., but without an insulation core, are acceptable if an automatic sprinkler or deluge system is installed...

  10. 30 CFR 57.4760 - Shaft mines.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... heat, smoke, or toxic fumes in the event of a fire. (b) If the destruction of any bulkhead on an..., but without an insulation core, are acceptable if an automatic sprinkler or deluge system is installed...

  11. 30 CFR 57.4760 - Shaft mines.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... heat, smoke, or toxic fumes in the event of a fire. (b) If the destruction of any bulkhead on an..., but without an insulation core, are acceptable if an automatic sprinkler or deluge system is installed...

  12. 30 CFR 57.4760 - Shaft mines.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... heat, smoke, or toxic fumes in the event of a fire. (b) If the destruction of any bulkhead on an..., but without an insulation core, are acceptable if an automatic sprinkler or deluge system is installed...

  13. Liquefaction and Storage of In-Situ Oxygen on the Surface of Mars

    NASA Technical Reports Server (NTRS)

    Hauser, Daniel M.; Johnson, Wesley L.; Sutherlin, Steven G.

    2016-01-01

    The In-Situ production of propellants for Martian and Lunar missions has been heavily discussed since the mid 1990's. One portion of the production of the propellants is the liquefaction, storage, and delivery of the propellants to the stage tanks. Two key technology development efforts are required: large refrigeration systems (cryocoolers) to perform the liquefaction and high performance insulation within a soft vacuum environment. Several different concepts of operation may be employed to liquefy the propellants based on how and where these two technologies are implemented. The concepts that were investigated include: using an accumulator tank to store the propellant until it is needed, liquefying in the flow stream going into the tank, and liquefying in the flight propellant tank itself. The different concept of operations were studied to assess the mass and power impacts of each concept. Additionally, the trade between insulation performance and cryocooler mass was performed to give performance targets for soft vacuum insulation development. It was found that liquefying within the flight propellant tank itself adds the least mass and power requirements to the mission.

  14. Adaptive Modeling, Engineering Analysis and Design of Advanced Aerospace Vehicles

    NASA Technical Reports Server (NTRS)

    Mukhopadhyay, Vivek; Hsu, Su-Yuen; Mason, Brian H.; Hicks, Mike D.; Jones, William T.; Sleight, David W.; Chun, Julio; Spangler, Jan L.; Kamhawi, Hilmi; Dahl, Jorgen L.

    2006-01-01

    This paper describes initial progress towards the development and enhancement of a set of software tools for rapid adaptive modeling, and conceptual design of advanced aerospace vehicle concepts. With demanding structural and aerodynamic performance requirements, these high fidelity geometry based modeling tools are essential for rapid and accurate engineering analysis at the early concept development stage. This adaptive modeling tool was used for generating vehicle parametric geometry, outer mold line and detailed internal structural layout of wing, fuselage, skin, spars, ribs, control surfaces, frames, bulkheads, floors, etc., that facilitated rapid finite element analysis, sizing study and weight optimization. The high quality outer mold line enabled rapid aerodynamic analysis in order to provide reliable design data at critical flight conditions. Example application for structural design of a conventional aircraft and a high altitude long endurance vehicle configuration are presented. This work was performed under the Conceptual Design Shop sub-project within the Efficient Aerodynamic Shape and Integration project, under the former Vehicle Systems Program. The project objective was to design and assess unconventional atmospheric vehicle concepts efficiently and confidently. The implementation may also dramatically facilitate physics-based systems analysis for the NASA Fundamental Aeronautics Mission. In addition to providing technology for design and development of unconventional aircraft, the techniques for generation of accurate geometry and internal sub-structure and the automated interface with the high fidelity analysis codes could also be applied towards the design of vehicles for the NASA Exploration and Space Science Mission projects.

  15. Operative hysteroscopy versus vacuum aspiration for incomplete spontaneous abortion (HY-PER): study protocol for a randomized controlled trial.

    PubMed

    Huchon, Cyrille; Koskas, Martin; Agostini, Aubert; Akladios, Cherif; Alouini, Souhail; Bauville, Estelle; Bourdel, Nicolas; Fernandez, Hervé; Fritel, Xavier; Graesslin, Olivier; Legendre, Guillaume; Lucot, Jean-Philippe; Matheron, Isabelle; Panel, Pierre; Raiffort, Cyril; Fauconnier, Arnaud

    2015-08-19

    Incomplete spontaneous abortions are defined by the intrauterine retention of the products of conception after their incomplete or partial expulsion. This condition may be managed by expectant care, medical treatment or surgery. Vacuum aspiration is currently the standard surgical treatment in most centers. However, operative hysteroscopy has the advantage over vacuum aspiration of allowing the direct visualization of the retained conception product, facilitating its elective removal while limiting surgical complications. Inadequately powered retrospective studies reported subsequent fertility to be higher in patients treated by operative hysteroscopy than in those treated by vacuum aspiration. These data require confirmation in a randomized controlled trial comparing fertility rates between women undergoing hysteroscopy and those undergoing vacuum aspiration for incomplete spontaneous abortion. After providing written informed consent, 572 women with incomplete spontaneous abortion recruited from 15 centers across France will undergo randomization by a centralized computer system for treatment by either vacuum aspiration or operative hysteroscopy. Patients will not be informed of the type of treatment that they receive and will be cared for during their hospital stay in accordance with standard practices at each center. The patients will be monitored for pregnancy or adverse effects by a telephone conversation or questionnaire sent by e-mail or post over a period of two years. In cases of complications, failure of the intervention or diagnosis of uterine cavity disease, patient care will be left to the discretion of the medical center team. If our hypothesis is confirmed, this study will provide evidence that the use of operative hysteroscopy can increase the number of pregnancies continuing beyond 22 weeks of gestation in the two-year period following incomplete spontaneous abortion without increasing the incidence of morbidity and peri- and postoperative complications. The standard surgical treatment of this condition would thus be modified. This study would therefore have a large effect on the surgical management of incomplete spontaneous abortion. ClinicalTrials.gov Identifier: NCT02201732 ; registered on 17 July 2014.

  16. Zero-index structures as an alternative platform for quantum optics

    PubMed Central

    Liberal, Iñigo

    2017-01-01

    Vacuum fluctuations are one of the most distinctive aspects of quantum optics, being the trigger of multiple nonclassical phenomena. Thus, platforms like resonant cavities and photonic crystals that enable the inhibition and manipulation of vacuum fluctuations have been key to our ability to control light–matter interactions (e.g., the decay of quantum emitters). Here, we theoretically demonstrate that vacuum fluctuations may be naturally inhibited within bodies immersed in epsilon-and-mu-near-zero (EMNZ) media, while they can also be selectively excited via bound eigenmodes. Therefore, zero-index structures are proposed as an alternative platform to manipulate the decay of quantum emitters, possibly leading to the exploration of qualitatively different dynamics. For example, a direct modulation of the vacuum Rabi frequency is obtained by deforming the EMNZ region without detuning a bound eigenmode. Ideas for the possible implementation of these concepts using synthetic implementations based on structural dispersion are also proposed. PMID:28096367

  17. Zero-index structures as an alternative platform for quantum optics.

    PubMed

    Liberal, Iñigo; Engheta, Nader

    2017-01-31

    Vacuum fluctuations are one of the most distinctive aspects of quantum optics, being the trigger of multiple nonclassical phenomena. Thus, platforms like resonant cavities and photonic crystals that enable the inhibition and manipulation of vacuum fluctuations have been key to our ability to control light-matter interactions (e.g., the decay of quantum emitters). Here, we theoretically demonstrate that vacuum fluctuations may be naturally inhibited within bodies immersed in epsilon-and-mu-near-zero (EMNZ) media, while they can also be selectively excited via bound eigenmodes. Therefore, zero-index structures are proposed as an alternative platform to manipulate the decay of quantum emitters, possibly leading to the exploration of qualitatively different dynamics. For example, a direct modulation of the vacuum Rabi frequency is obtained by deforming the EMNZ region without detuning a bound eigenmode. Ideas for the possible implementation of these concepts using synthetic implementations based on structural dispersion are also proposed.

  18. Vacuum electron acceleration by coherent dipole radiation

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    Troha, A.L.; Van Meter, J.R.; Landahl, E.C.

    1999-07-01

    The validity of the concept of laser-driven vacuum acceleration has been questioned, based on an extrapolation of the well-known Lawson-Woodward theorem, which stipulates that plane electromagnetic waves cannot accelerate charged particles in vacuum. To formally demonstrate that electrons can indeed be accelerated in vacuum by focusing or diffracting electromagnetic waves, the interaction between a point charge and coherent dipole radiation is studied in detail. The corresponding four-potential exactly satisfies both Maxwell{close_quote}s equations and the Lorentz gauge condition everywhere, and is analytically tractable. It is found that in the far-field region, where the field distribution closely approximates that of a planemore » wave, we recover the Lawson-Woodward result, while net acceleration is obtained in the near-field region. The scaling of the energy gain with wave-front curvature and wave amplitude is studied systematically. {copyright} {ital 1999} {ital The American Physical Society}« less

  19. 46 CFR 148.315 - Sulfur.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... lump or coarse grain powder sulfur only. Fine-grained powder (“flowers of sulfur”) may not be... completed, sulfur dust must be removed from the vessel's decks, bulkheads, and overheads. Cargo residues and...

  20. 46 CFR 148.315 - Sulfur.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... lump or coarse grain powder sulfur only. Fine-grained powder (“flowers of sulfur”) may not be... completed, sulfur dust must be removed from the vessel's decks, bulkheads, and overheads. Cargo residues and...

  1. 46 CFR 148.315 - Sulfur.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... lump or coarse grain powder sulfur only. Fine-grained powder (“flowers of sulfur”) may not be... completed, sulfur dust must be removed from the vessel's decks, bulkheads, and overheads. Cargo residues and...

  2. 46 CFR 148.315 - Sulfur.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... lump or coarse grain powder sulfur only. Fine-grained powder (“flowers of sulfur”) may not be... completed, sulfur dust must be removed from the vessel's decks, bulkheads, and overheads. Cargo residues and...

  3. 46 CFR 42.15-10 - Doors.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... superstructures shall be fitted with doors of steel or other equivalent material, permanently and strongly attached to the bulkhead, and framed, stiffened and fitted so that the whole structure is of equivalent...

  4. 46 CFR 42.15-10 - Doors.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... superstructures shall be fitted with doors of steel or other equivalent material, permanently and strongly attached to the bulkhead, and framed, stiffened and fitted so that the whole structure is of equivalent...

  5. 46 CFR 42.15-10 - Doors.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... superstructures shall be fitted with doors of steel or other equivalent material, permanently and strongly attached to the bulkhead, and framed, stiffened and fitted so that the whole structure is of equivalent...

  6. 46 CFR 42.15-10 - Doors.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... superstructures shall be fitted with doors of steel or other equivalent material, permanently and strongly attached to the bulkhead, and framed, stiffened and fitted so that the whole structure is of equivalent...

  7. 46 CFR 42.15-10 - Doors.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... superstructures shall be fitted with doors of steel or other equivalent material, permanently and strongly attached to the bulkhead, and framed, stiffened and fitted so that the whole structure is of equivalent...

  8. Experimental Study of a Nozzle Using Fluidic Counterflow for Thrust Vectoring

    NASA Technical Reports Server (NTRS)

    Flamm, Jeffrey D.

    1998-01-01

    A static experimental investigation of a counterflow thrust vectoring nozzle concept was performed. The study was conducted in the NASA Langley Research Center Jet Exit Test Facility. Internal performance characteristics were defined over a nozzle pressure ratio (jet total to ambient) range of 3.5 to 10.0. The effects of suction collar geometry and suction slot height on nozzle performance were examined. In the counterflow concept, thrust vectoring is achieved by applying a vacuum to a slot adjacent to a primary jet that is shrouded by a suction collar. Two flow phenomena work to vector the primary jet depending upon the test conditions and configuration. In one case, the vacuum source creates a secondary reverse flowing stream near the primary jet. The shear layers between the two counterflowing streams mix and entrain mass from the surrounding fluid. The presence of the collar inhibits mass entrainment and the flow near the collar accelerates, causing a drop in pressure on the collar. The second case works similarly except that the vacuum is not powerful enough to create a counterflowing stream and instead a coflowing stream is present. The primary jet is vectored if suction is applied asymmetrically on the top or bottom of the jet.

  9. Commander Lousma works with EEVT experiment and cryogenic tube on aft middeck

    NASA Image and Video Library

    1982-03-31

    Commander Jack Lousma works with Electrophoresis Equipment Verification Test (EEVT) electrophoresis unit, cryogenic freezer and tube, and stowage locker equipment located on crew compartment middeck aft bulkhead.

  10. 14 CFR Appendix A to Part 125 - Additional Emergency Equipment

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... location if it is more practical because of low headroom; (ii) Next to each floor level passenger emergency...; and (iii) On each bulkhead or divider that prevents fore and aft vision along the passenger cabin, to...

  11. 14 CFR Appendix A to Part 125 - Additional Emergency Equipment

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... location if it is more practical because of low headroom; (ii) Next to each floor level passenger emergency...; and (iii) On each bulkhead or divider that prevents fore and aft vision along the passenger cabin, to...

  12. 14 CFR Appendix A to Part 125 - Additional Emergency Equipment

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... location if it is more practical because of low headroom; (ii) Next to each floor level passenger emergency...; and (iii) On each bulkhead or divider that prevents fore and aft vision along the passenger cabin, to...

  13. 14 CFR Appendix A to Part 125 - Additional Emergency Equipment

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... location if it is more practical because of low headroom; (ii) Next to each floor level passenger emergency...; and (iii) On each bulkhead or divider that prevents fore and aft vision along the passenger cabin, to...

  14. 49 CFR 176.130 - Magazine stowage Type A.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... structure, the vessel's sides and bulkheads must be clean, free from rust or scale, and protected by... clean and free of rust and scale, but need not be battened. (d) The top of the stow within the magazine...

  15. 49 CFR 176.130 - Magazine stowage Type A.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... structure, the vessel's sides and bulkheads must be clean, free from rust or scale, and protected by... clean and free of rust and scale, but need not be battened. (d) The top of the stow within the magazine...

  16. 49 CFR 176.130 - Magazine stowage Type A.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... structure, the vessel's sides and bulkheads must be clean, free from rust or scale, and protected by... clean and free of rust and scale, but need not be battened. (d) The top of the stow within the magazine...

  17. 14 CFR Appendix A to Part 125 - Additional Emergency Equipment

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... location if it is more practical because of low headroom; (ii) Next to each floor level passenger emergency...; and (iii) On each bulkhead or divider that prevents fore and aft vision along the passenger cabin, to...

  18. Maintenance method and its critical issues for a fast-ignition laser fusion reactor based on a dry wall chamber

    NASA Astrophysics Data System (ADS)

    Someya, Y.; Matsumoto, T.; Okano, K.; Asaoka, Y.; Hiwatari, R.; Goto, T.; Ogawa, Y.

    2008-05-01

    The neutronics analysis has been carried out for feasibility study of the FALCON-D concept by Monte Carlo N-paticle transport code (MCNP), in order to inspect the cooling performance of in-vessel and ex-vessel components, and a connection pipe between Vacuum Vessel and reactor room. The nuclear heating rate in the Vacuum Vessel was at the same level as that of NBI duct of the ITER. The temperature of the connection pipe was found to be 345·, ·which was smaller than the melting point of structure materials (F82H). Moreover, the radiation damage of the final optics was also investigated. We propose a sliding changer concept for replacement. This method could be adapted for the replacement of one FPY cycle in the final optics system.

  19. Sodium Heat Pipe Module Processing For the SAFE-100 Reactor Concept

    NASA Technical Reports Server (NTRS)

    Martin, James; Salvail, Pat

    2003-01-01

    To support development and hardware-based testing of various space reactor concepts, the Early Flight Fission-Test Facility (EFF-TF) team established a specialized glove box unit with ancillary systems to handle/process alkali metals. Recently, these systems have been commissioned with sodium supporting the fill of stainless steel heat pipe modules for use with a 100 kW thermal heat pipe reactor design. As part of this effort, procedures were developed and refined to govern each segment of the process covering: fill, leak check, vacuum processing, weld closeout, and final "wet in". A series of 316 stainless steel modules, used as precursors to the actual 321 stainless steel modules, were filled with 35 +/- 1 grams of sodium using a known volume canister to control the dispensed mass. Each module was leak checked to less than10(exp -10) std cc/sec helium and vacuum conditioned at 250 C to assist in the removal of trapped gases. A welding procedure was developed to close out the fill stem preventing external gases from entering the evacuated module. Finally the completed modules were vacuum fired at 750 C allowing the sodium to fully wet the internal surface and wick structure of the heat pipe module.

  20. Sodium Heat Pipe Module Processing For the SAFE-100 Reactor Concept

    NASA Astrophysics Data System (ADS)

    Martin, James; Salvail, Pat

    2004-02-01

    To support development and hardware-based testing of various space reactor concepts, the Early Flight Fission-Test Facility (EFF-TF) team established a specialized glove box unit with ancillary systems to handle/process alkali metals. Recently, these systems have been commissioned with sodium supporting the fill of stainless steel heat pipe modules for use with a 100 kW thermal heat pipe reactor design. As part of this effort, procedures were developed and refined to govern each segment of the process covering: fill, leak check, vacuum processing, weld closeout, and final ``wet in''. A series of 316 stainless steel modules, used as precursors to the actual 321 stainless steel modules, were filled with 35 +/-1 grams of sodium using a known volume canister to control the dispensed mass. Each module was leak checked to <10-10 std cc/sec helium and vacuum conditioned at 250 °C to assist in the removal of trapped gases. A welding procedure was developed to close out the fill stem preventing external gases from entering the evacuated module. Finally the completed modules were vacuum fired at 750 °C allowing the sodium to fully wet the internal surface and wick structure of the heat pipe module.

  1. 46 CFR 56.50-70 - Gasoline fuel systems.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    .... (1) Fuel supply piping to the engines shall be of seamless drawn annealed copper pipe or tubing... sharp edges. Where passing through steel decks or bulkheads, fuel lines shall be protected by close...

  2. 46 CFR 56.50-70 - Gasoline fuel systems.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    .... (1) Fuel supply piping to the engines shall be of seamless drawn annealed copper pipe or tubing... sharp edges. Where passing through steel decks or bulkheads, fuel lines shall be protected by close...

  3. 46 CFR 56.50-70 - Gasoline fuel systems.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    .... (1) Fuel supply piping to the engines shall be of seamless drawn annealed copper pipe or tubing... sharp edges. Where passing through steel decks or bulkheads, fuel lines shall be protected by close...

  4. 46 CFR 56.50-70 - Gasoline fuel systems.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    .... (1) Fuel supply piping to the engines shall be of seamless drawn annealed copper pipe or tubing... sharp edges. Where passing through steel decks or bulkheads, fuel lines shall be protected by close...

  5. 46 CFR 56.50-70 - Gasoline fuel systems.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    .... (1) Fuel supply piping to the engines shall be of seamless drawn annealed copper pipe or tubing... sharp edges. Where passing through steel decks or bulkheads, fuel lines shall be protected by close...

  6. 46 CFR 169.823 - Openings.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... bulkheads, hatches, and openings in the hull must be kept closed during the navigation of the vessel. (b) The master may permit hatches or other openings to be uncovered or opened for reasonable purposes such...

  7. 46 CFR 169.823 - Openings.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... bulkheads, hatches, and openings in the hull must be kept closed during the navigation of the vessel. (b) The master may permit hatches or other openings to be uncovered or opened for reasonable purposes such...

  8. 46 CFR 169.823 - Openings.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... bulkheads, hatches, and openings in the hull must be kept closed during the navigation of the vessel. (b) The master may permit hatches or other openings to be uncovered or opened for reasonable purposes such...

  9. More sinking feelings

    NASA Astrophysics Data System (ADS)

    Nickson, Robert

    2012-06-01

    Regarding John Chubb's comment that the Titanic might not have sunk if it had included some longitudinal watertight bulkheads (May p22), this issue was actually discussed during the Board of Trade enquiry after the ship sunk.

  10. 78 FR 35749 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-14

    ... contamination of the strut forward dry bay, which could result in hydrogen embrittlement of the titanium forward... could result in hydrogen embrittlement of the titanium forward engine mount bulkhead fittings, and...

  11. 31. Stair Plans / First Floor, Second Floor, Section Stair ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    31. Stair Plans / First Floor, Second Floor, Section Stair Bulkhead, F.S. Tread & Riser (drawing 8) - Whittier State School, Hospital & Receiving Building, 11850 East Whittier Boulevard, Whittier, Los Angeles County, CA

  12. 46 CFR 78.17-3 - Watertight doors.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... doors in subdivision bulkheads that may be opened at sea, and all mechanisms, remote controls, and... navigated to be assured that they are in proper operating condition. On vessels in which the voyage exceeds...

  13. 46 CFR 78.17-3 - Watertight doors.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... doors in subdivision bulkheads that may be opened at sea, and all mechanisms, remote controls, and... navigated to be assured that they are in proper operating condition. On vessels in which the voyage exceeds...

  14. 46 CFR 78.17-3 - Watertight doors.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... doors in subdivision bulkheads that may be opened at sea, and all mechanisms, remote controls, and... navigated to be assured that they are in proper operating condition. On vessels in which the voyage exceeds...

  15. 46 CFR 78.17-3 - Watertight doors.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... doors in subdivision bulkheads that may be opened at sea, and all mechanisms, remote controls, and... navigated to be assured that they are in proper operating condition. On vessels in which the voyage exceeds...

  16. 46 CFR 78.17-3 - Watertight doors.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... doors in subdivision bulkheads that may be opened at sea, and all mechanisms, remote controls, and... navigated to be assured that they are in proper operating condition. On vessels in which the voyage exceeds...

  17. 46 CFR 169.317 - Accommodations.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... of the stem. The space must not be located totally below the deepest load waterline. (b) Bulkheads separating accommodations from machinery spaces, paint lockers, storerooms, washrooms, and toilet facilities... and Arrangement Living Spaces § 169.317 Accommodations. (a) Quarters must have sufficient fresh air...

  18. 46 CFR 169.317 - Accommodations.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... of the stem. The space must not be located totally below the deepest load waterline. (b) Bulkheads separating accommodations from machinery spaces, paint lockers, storerooms, washrooms, and toilet facilities... and Arrangement Living Spaces § 169.317 Accommodations. (a) Quarters must have sufficient fresh air...

  19. 46 CFR 169.317 - Accommodations.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... of the stem. The space must not be located totally below the deepest load waterline. (b) Bulkheads separating accommodations from machinery spaces, paint lockers, storerooms, washrooms, and toilet facilities... and Arrangement Living Spaces § 169.317 Accommodations. (a) Quarters must have sufficient fresh air...

  20. Measurement of the accumulation of water ice on optical components in cryogenic vacuum environments

    NASA Astrophysics Data System (ADS)

    Moeller, Trevor M.; Montgomery Smith, L.; Collins, Frank G.; Labello, Jesse M.; Rogers, James P.; Lowry, Heard S.; Crider, Dustin H.

    2012-11-01

    Standard vacuum practices mitigate the presence of water vapor and contamination inside cryogenic vacuum chambers. However, anomalies can occur in the facility that can cause the accumulation of amorphous water ice on optics and test articles. Under certain conditions, the amorphous ice on optical components shatters, which leads to a reduction in signal or failure of the component. An experiment was performed to study and measure the deposition of water (H2O) ice on optical surfaces under high-vacuum cryogenic conditions. Water was introduced into a cryogenic vacuum chamber, via a hydrated molecular sieve zeolite, through an effusion cell and impinged upon a quartz-crystal microbalance (QCM) and first-surface gold-plated mirror. A laser and photodiode setup, external to the vacuum chamber, monitored the multiple-beam interference reflectance of the ice-mirror configuration while the QCM measured the mass deposition. Data indicates that water ice, under these conditions, accumulates as a thin film on optical surfaces to thicknesses over 45 microns and can be detected and measured by nonintrusive optical methods which are based upon multiple-beam interference phenomena. The QCM validated the interference measurements. This experiment established proof-of-concept for a miniature system for monitoring ice accumulation within the chamber.

  1. 19. DETAIL VIEW OF UPPER EAST WALL CONTROL STATION, SHOWING ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    19. DETAIL VIEW OF UPPER EAST WALL CONTROL STATION, SHOWING EMERGENCY BULKHEAD STIFFLEG DERRICK TO RIGHT, LOOKING WEST - Upper Mississippi River 9-Foot Channel Project, Lock & Dam 27, Granite City, Madison County, IL

  2. 14 CFR 135.178 - Additional emergency equipment.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... location if it is more practical because of low headroom; (ii) Next to each floor level passenger emergency...; and (iii) On each bulkhead or divider that prevents fore and aft vision along the passenger cabin, to...

  3. 14 CFR 135.178 - Additional emergency equipment.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... location if it is more practical because of low headroom; (ii) Next to each floor level passenger emergency...; and (iii) On each bulkhead or divider that prevents fore and aft vision along the passenger cabin, to...

  4. 14 CFR 135.178 - Additional emergency equipment.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... location if it is more practical because of low headroom; (ii) Next to each floor level passenger emergency...; and (iii) On each bulkhead or divider that prevents fore and aft vision along the passenger cabin, to...

  5. 14 CFR 135.178 - Additional emergency equipment.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... location if it is more practical because of low headroom; (ii) Next to each floor level passenger emergency...; and (iii) On each bulkhead or divider that prevents fore and aft vision along the passenger cabin, to...

  6. 14 CFR 135.178 - Additional emergency equipment.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... location if it is more practical because of low headroom; (ii) Next to each floor level passenger emergency...; and (iii) On each bulkhead or divider that prevents fore and aft vision along the passenger cabin, to...

  7. A thin polymer membrane, nano-suit, enhancing survival across the continuum between air and high vacuum

    PubMed Central

    Takaku, Yasuharu; Suzuki, Hiroshi; Ohta, Isao; Ishii, Daisuke; Muranaka, Yoshinori; Shimomura, Masatsugu; Hariyama, Takahiko

    2013-01-01

    Most multicellular organisms can only survive under atmospheric pressure. The reduced pressure of a high vacuum usually leads to rapid dehydration and death. Here we show that a simple surface modification can render multicellular organisms strongly tolerant to high vacuum. Animals that collapsed under high vacuum continued to move following exposure of their natural extracellular surface layer (or that of an artificial coat-like polysorbitan monolaurate) to an electron beam or plasma ionization (i.e., conditions known to enhance polymer formation). Transmission electron microscopic observations revealed the existence of a thin polymerized extra layer on the surface of the animal. The layer acts as a flexible “nano-suit” barrier to the passage of gases and liquids and thus protects the organism. Furthermore, the biocompatible molecule, the component of the nano-suit, was fabricated into a “biomimetic” free-standing membrane. This concept will allow biology-related fields especially to use these membranes for several applications. PMID:23589878

  8. 46 CFR 97.36-1 - When required.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... the vessel the following plans: (a) General arrangement plans showing for each deck the fire control stations, the various sections enclosed by fire-resisting bulkheads, together with particulars of the fire alarms, detecting systems, the sprinkler installation (if any), the fire extinguishing appliances, means...

  9. 46 CFR 97.36-1 - When required.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... the vessel the following plans: (a) General arrangement plans showing for each deck the fire control stations, the various sections enclosed by fire-resisting bulkheads, together with particulars of the fire alarms, detecting systems, the sprinkler installation (if any), the fire extinguishing appliances, means...

  10. 46 CFR 97.36-1 - When required.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... the vessel the following plans: (a) General arrangement plans showing for each deck the fire control stations, the various sections enclosed by fire-resisting bulkheads, together with particulars of the fire alarms, detecting systems, the sprinkler installation (if any), the fire extinguishing appliances, means...

  11. Comparison of species composition and richness of fish assemblages in altered and unaltered littoral habitats

    USGS Publications Warehouse

    Poe, T.P.; Hatcher, C.O.; Brown, C.L.; Schloesser, D.W.

    1986-01-01

    Species composition and richness of fish assemblages in altered and unaltered littoral habitats in Lake St. Clair, Michigan, differed between areas. A percid-cyprinid-cyprinodontid assemblage dominated in the unaltered area, Muscamoot Bay, which has a natural shoreline (with almost no alteration due to dredging or bulkheading), high water quality, and high species richness of aquatic macrophytes. A centrarchid assemblage dominated in the altered area, Belvidere Bay, which has a bulkheaded shoreline, many dredged areas, reduced water quality due to inputs of nutrients from a nearby river, and relatively low species richness of aquatic macrophytes. Habitat factors, species richness and abundance of aquatic macrophytes, had the most influence on fish community structure in both areas. The percid-cyprinid-cyprinodontid assemblage was significantly correlated with six species of macrophytes whereas the centrarchid assemblage was significantly correlated with only four. These patterns suggest that preference for diverse habitats was higher, and tolerance to habitat alteration lower, in percid-cyprinid-cyprinodontid assemblages than in centrarchid assemblages.

  12. Collecting cometary soil samples? Development of the ROSETTA sample acquisition system

    NASA Technical Reports Server (NTRS)

    Coste, P. A.; Fenzi, M.; Eiden, Michael

    1993-01-01

    In the reference scenario of the ROSETTA CNRS mission, the Sample Acquisition System is mounted on the Comet Lander. Its tasks are to acquire three kinds of cometary samples and to transfer them to the Earth Return Capsule. Operations are to be performed in vacuum and microgravity, on a probably rough and dusty surface, in a largely unknown material, at temperatures in the order of 100 K. The concept and operation of the Sample Acquisition System are presented. The design of the prototype corer and surface sampling tool, and of the equipment for testing them at cryogenic temperatures in ambient conditions and in vacuum in various materials representing cometary soil, are described. Results of recent preliminary tests performed in low temperature thermal vacuum in a cometary analog ice-dust mixture are provided.

  13. 33 CFR 183.445 - Conductors: Protection.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 2 2011-07-01 2011-07-01 false Conductors: Protection. 183.445 Section 183.445 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED... Conductors: Protection. (a) Each conductor or group of conductors that passes through a bulkhead, structural...

  14. 33 CFR 183.445 - Conductors: Protection.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Conductors: Protection. 183.445 Section 183.445 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED... Conductors: Protection. (a) Each conductor or group of conductors that passes through a bulkhead, structural...

  15. 46 CFR 190.07-10 - Construction.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ..., including stringers and treads, shall be of steel. (6) Except for washrooms and toilet spaces, deck... laboratories spaces within a general laboratory area may be of B or C class construction. (2) Temporary divisional bulkheads between laboratory spaces within a general laboratory area may be constructed of...

  16. 46 CFR 190.07-10 - Construction.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ..., including stringers and treads, shall be of steel. (6) Except for washrooms and toilet spaces, deck... laboratories spaces within a general laboratory area may be of B or C class construction. (2) Temporary divisional bulkheads between laboratory spaces within a general laboratory area may be constructed of...

  17. 46 CFR 190.07-10 - Construction.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ..., including stringers and treads, shall be of steel. (6) Except for washrooms and toilet spaces, deck... laboratories spaces within a general laboratory area may be of B or C class construction. (2) Temporary divisional bulkheads between laboratory spaces within a general laboratory area may be constructed of...

  18. 46 CFR 190.07-10 - Construction.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ..., including stringers and treads, shall be of steel. (6) Except for washrooms and toilet spaces, deck... laboratories spaces within a general laboratory area may be of B or C class construction. (2) Temporary divisional bulkheads between laboratory spaces within a general laboratory area may be constructed of...

  19. 22. VIEW LOOKING FORWARD INTO CHAIN LOCKER FROM PORT SIDE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    22. VIEW LOOKING FORWARD INTO CHAIN LOCKER FROM PORT SIDE ENTRY THROUGH CHAIN LOCKER BULKHEAD. PAWL BITT SHOWN IN FOREGROUND - Pilot Schooner "Alabama", Moored in harbor at Vineyard Haven, Vineyard Haven, Dukes County, MA

  20. 46 CFR 28.385 - Structural fire protection for vessels that operate with more than 49 individuals on board.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... SECURITY UNINSPECTED VESSELS REQUIREMENTS FOR COMMERCIAL FISHING INDUSTRY VESSELS Requirements for Vessels...) Construction. The hull, structural bulkheads, columns and stanchions must be composed of steel. Superstructures...

  1. Conceptual Revolution of the 20th Century Leading to One Grand Unified Concept -- The Quantum Vacuum

    NASA Astrophysics Data System (ADS)

    Sreekantan, B. V.

    2014-07-01

    Concepts and the relations between concepts are the basis for all our scientific understanding and explanation of the wide variety of constituents and phenomena in nature. Some of the fundamental concepts like space, time, matter, radiation, causality, etc. had remained unchanged for almost four hundred years from the time of the dawn of science. However all these underwent a drastic transformation in the 20th century because of two reasons. One, in the light of certain experimental findings two radical theories namely theory of relativity and theory of quantum mechanics replaced the classical theory that had dominated since Newton's time. Secondly, the science-technology spiral resulted in the discovery of very many new features of the universe both on the micro scale and on the mega scale. There was an exponential increase in our knowledge. These new facts could not be fitted into the old concepts. Apart from drastic revision, many new concepts had to be brought in. Despite all this, one very encouraging trend has been to discern a holistic synthesis and unification of the different concepts -- an endeavor that has been helped by experiments over a wide scale of energy and distances and most importantly from theoretical insights triggered by mathematical underpinnings. These developments in physics and astrophysics are pointing to one grand concept, namely, the "quantum vacuum" endowed with certain special properties, as the substratum from which all the constituents of the universe as well as the processes of the universe emerge, including the creation of the universe itself. This is the view, at least of some of the scientists. In this brief article the essence of these approaches toward unification is highlighted. Maybe life sciences can take a clue from these developments in physical sciences.

  2. Analysis of the performance of the space ultravacuum research facility in attached and free-flyer mode

    NASA Technical Reports Server (NTRS)

    Naumann, Robert J.

    1988-01-01

    The old concept of using the wake of a spacecraft to obtain an ultrahigh vacuum is revisited with a somewhat different emphasis. Since it is possible to configure a wake shield so that a surface of interest does not subtend any walls that could become contaminated, it appears that it should be possible to achieve a contamination-free, ultrahigh vacuum capability with infinite pumping speed even in the presence of high heat loads and moderate gas loads. With the new interest in developing thin films with precision controlled synthetic microstructures such as superlattices, mixed metal oxide high temperature superconductors, rare-earth magneto-optical devices, and nano-crystalline alloys, the ability to work with a variety of different materials without cross contamination should be of significance. This paper analyzes the performance of the conceptual design for a Space Ultravacuum Research Facility (SURF), both in a Shuttle-attached mode and as a free-flyer. It is shown that even in the Shuttle-attached mode, it should be possible to obtain vacuum levels equivalent to 10 to the -10 Torr with O and N2 as the primary constituents. This should be sufficient to demonstrate the feasibility of the concept, particularly the infinite pumping speed and virtual elimination of contamination aspects. As a free-flyer the SURF will be limited primarily by the gas load associated with the process being performed. For chemical beam epitaxy (CBE) it is shown that equivalent vacuum levels of 10 to the -14 Torr should be possible at 300 km.

  3. Potential uses of vacuum bubbles in noise and vibration control

    NASA Technical Reports Server (NTRS)

    Ver, Istvan L.

    1989-01-01

    Vacuum bubbles are new acoustic elements which are dynamically more compliant than the gas volume they replace, but which are statically robust. They are made of a thin metallic shell with vacuum in their cavity. Consequently, they pose no danger in terms of contamination or fire hazard. The potential of the vacuum bubble concept for noise and vibration control was assessed with special emphases on spacecraft and aircraft applications. The following potential uses were identified: (1) as a cladding, to reduce sound radiation of vibrating surfaces and the sound excitation of structures, (2) as a screen, to reflect or absorb an incident sound wave, and (3) as a liner, to increase low frequency sound transmission loss of double walls and to increase the low frequency sound attenuation of muffler baffles. It was found that geometric and material parameters must be controlled to a very high accuracy to obtain optimal performance and that performance is highly sensitive to variations in static pressure. Consequently, it was concluded that vacuum bubbles have more potential in spacecraft applications where static pressure is controlled more than in aircraft applications where large fluctuations in static pressure are common.

  4. SEMINAR PROCEEDINGS: RCRA CORRECTIVE ACTION STABILIZATION TECHNOLOGIES

    EPA Science Inventory

    The seminar publication provides an overview of many technologies that can be used in applying the stabilization concept to RCRA cleanup activities. Technologies discussed include covers, grouting, slurry walls, hydrofracture, horizontal well drilling, a vacuum extraction, and b...

  5. 46 CFR 179.310 - Collision bulkheads.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... as far inboard as practicable and they have a means to make them watertight. (b) The forward... more than 15 percent of the length between perpendiculars (LBP) aft of the forward perpendicular, or for vessels with bulbous bows extending forward of the forward perpendicular and contributing more...

  6. 46 CFR 179.310 - Collision bulkheads.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... as far inboard as practicable and they have a means to make them watertight. (b) The forward... more than 15 percent of the length between perpendiculars (LBP) aft of the forward perpendicular, or for vessels with bulbous bows extending forward of the forward perpendicular and contributing more...

  7. 46 CFR 179.212 - Watertight bulkheads for subdivision and damage stability.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... this chapter, a monohull vessel which undergoes a simplified stability proof test in accordance with... stability. 179.212 Section 179.212 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SMALL PASSENGER VESSELS (UNDER 100 GROSS TONS) SUBDIVISION, DAMAGE STABILITY, AND WATERTIGHT INTEGRITY Subdivision...

  8. 46 CFR 179.212 - Watertight bulkheads for subdivision and damage stability.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... this chapter, a monohull vessel which undergoes a simplified stability proof test in accordance with... stability. 179.212 Section 179.212 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SMALL PASSENGER VESSELS (UNDER 100 GROSS TONS) SUBDIVISION, DAMAGE STABILITY, AND WATERTIGHT INTEGRITY Subdivision...

  9. 46 CFR 179.212 - Watertight bulkheads for subdivision and damage stability.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... this chapter, a monohull vessel which undergoes a simplified stability proof test in accordance with... stability. 179.212 Section 179.212 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SMALL PASSENGER VESSELS (UNDER 100 GROSS TONS) SUBDIVISION, DAMAGE STABILITY, AND WATERTIGHT INTEGRITY Subdivision...

  10. 46 CFR 179.212 - Watertight bulkheads for subdivision and damage stability.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... this chapter, a monohull vessel which undergoes a simplified stability proof test in accordance with... stability. 179.212 Section 179.212 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SMALL PASSENGER VESSELS (UNDER 100 GROSS TONS) SUBDIVISION, DAMAGE STABILITY, AND WATERTIGHT INTEGRITY Subdivision...

  11. 33 CFR 183.410 - Ignition protection.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... both vertically and horizontally the distance of the open space between the fuel source and the... sources, such as engines, and valves, connections, or other fittings in vent lines, fill lines... component is isolated from a gasoline fuel source if: (1) A bulkhead that meets the requirements of...

  12. 5. VIEW TO SOUTH IN CONTROL ROOM ABOVE PUMP CHAMBER, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    5. VIEW TO SOUTH IN CONTROL ROOM ABOVE PUMP CHAMBER, SHOWING PUMP MOTOR AND STEEL BULKHEADS IN FLOOR FOR ACCESS TO PUMPS - Providence Sewage Treatment System, Reservoir Avenue Pumping Station, Reservoir & Pontiac Avenues, Providence, Providence County, RI

  13. 16. 4th floor roof, view west, north side of setback ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    16. 4th floor roof, view west, north side of setback to left and delivery stair bulkhead to right - Sheffield Farms Milk Plant, 1075 Webster Avenue (southwest corner of 166th Street), Bronx, Bronx County, NY

  14. 46 CFR 114.400 - Definitions of terms used in this subchapter.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... only at an approved A-Class or B-Class bulkhead. Control space (1) means a space containing: (1) An...; (3) Centralized fire control or detection equipment, such as fixed gas extinguishing system controls; or (4) Machinery controls not located within a machinery space. Corrosion-resistant material or...

  15. 46 CFR 114.400 - Definitions of terms used in this subchapter.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... only at an approved A-Class or B-Class bulkhead. Control space (1) means a space containing: (1) An...; (3) Centralized fire control or detection equipment, such as fixed gas extinguishing system controls; or (4) Machinery controls not located within a machinery space. Corrosion-resistant material or...

  16. A Brief Review on Metamaterial-Based Vacuum Electronics for Terahertz and Microwave Science and Technology

    NASA Astrophysics Data System (ADS)

    Matsui, Tatsunosuke

    2017-09-01

    Metamaterials, which enable us to realize novel physical effects that cannot be achieved using natural materials, have been extensively studied in recent years and significant progress has been made, especially in the field of optics. This game-changing concept has also initiated a rich variety of research activity in vacuum electronics. Here we review the recent development of metamaterial-based vacuum electronics for terahertz (THz) and microwave science and technology. The reversed Cherenkov radiation (RCR) in double-negative (DNG) metamaterials predicted by Veselago back in the 1960s has been experimentally verified in the microwave frequency range by utilizing specially designed DNG metamaterials. The interaction of an electron beam (e-beam) with DNG metamaterials may lead to the realization of novel applications such as microwave and THz radiation sources, accelerators, and even the visualization of invisibility cloaks. Smith-Purcell radiation (SPR) has recently received renewed interest owing to the development of metamaterials and the concept of spoof surface plasmon polaritons, as discussed in this review, and recent results on e-beam-induced directional and wide-band THz radiation with sharp multiple peaks from a graded grating, as well as directional and monochromatic special SPR and their possible application to THz orotron devices, are also reviewed.

  17. Integrated structure vacuum tube: A Concept

    NASA Technical Reports Server (NTRS)

    Dimeff, J.; Kerwin, W. J.

    1974-01-01

    Cathode emission is made to occur by heating entire structure to 600 C, and positive potential is applied to anode with negative potential on grids. Electron flow takes place from ring to circular anode through electric field produced by grids.

  18. 36 CFR 28.10 - Permitted and prohibited uses.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... natural resources of the Seashore, on any lands, whether publicly or privately-held, which lie below mean... a building, bulkhead, pile, septic system, revetment, deck, swimming pool, or other structure or man... education, and natural resource protection uses and facilities consistent with the uses and facilities...

  19. 46 CFR 171.115 - Specific applicability.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 7 2011-10-01 2011-10-01 false Specific applicability. 171.115 Section 171.115 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SUBDIVISION AND STABILITY SPECIAL RULES PERTAINING TO VESSELS CARRYING PASSENGERS Openings in the Side of a Vessel Below the Bulkhead or Weather Deck...

  20. 46 CFR 171.115 - Specific applicability.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 7 2012-10-01 2012-10-01 false Specific applicability. 171.115 Section 171.115 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SUBDIVISION AND STABILITY SPECIAL RULES PERTAINING TO VESSELS CARRYING PASSENGERS Openings in the Side of a Vessel Below the Bulkhead or Weather Deck...

  1. 46 CFR 171.115 - Specific applicability.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Specific applicability. 171.115 Section 171.115 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SUBDIVISION AND STABILITY SPECIAL RULES PERTAINING TO VESSELS CARRYING PASSENGERS Openings in the Side of a Vessel Below the Bulkhead or Weather Deck...

  2. 46 CFR 171.115 - Specific applicability.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 7 2013-10-01 2013-10-01 false Specific applicability. 171.115 Section 171.115 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SUBDIVISION AND STABILITY SPECIAL RULES PERTAINING TO VESSELS CARRYING PASSENGERS Openings in the Side of a Vessel Below the Bulkhead or Weather Deck...

  3. 46 CFR 171.115 - Specific applicability.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 7 2014-10-01 2014-10-01 false Specific applicability. 171.115 Section 171.115 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SUBDIVISION AND STABILITY SPECIAL RULES PERTAINING TO VESSELS CARRYING PASSENGERS Openings in the Side of a Vessel Below the Bulkhead or Weather Deck...

  4. 46 CFR 38.15-15 - Electrical installations-TB/ALL.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... this chapter for tank vessels, except as otherwise specified in this part. (b) Spaces containing cargo... devices, except Coast Guard approved intrinsically safe devices, shall be installed in these spaces. Electric motors shall be segregated from these spaces by a gastight bulkhead. Electric lighting of the...

  5. 46 CFR 38.15-15 - Electrical installations-TB/ALL.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... this chapter for tank vessels, except as otherwise specified in this part. (b) Spaces containing cargo... devices, except Coast Guard approved intrinsically safe devices, shall be installed in these spaces. Electric motors shall be segregated from these spaces by a gastight bulkhead. Electric lighting of the...

  6. 46 CFR 38.15-15 - Electrical installations-TB/ALL.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... this chapter for tank vessels, except as otherwise specified in this part. (b) Spaces containing cargo... devices, except Coast Guard approved intrinsically safe devices, shall be installed in these spaces. Electric motors shall be segregated from these spaces by a gastight bulkhead. Electric lighting of the...

  7. 46 CFR 38.15-15 - Electrical installations-TB/ALL.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... this chapter for tank vessels, except as otherwise specified in this part. (b) Spaces containing cargo... devices, except Coast Guard approved intrinsically safe devices, shall be installed in these spaces. Electric motors shall be segregated from these spaces by a gastight bulkhead. Electric lighting of the...

  8. 46 CFR 38.15-15 - Electrical installations-TB/ALL.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... this chapter for tank vessels, except as otherwise specified in this part. (b) Spaces containing cargo... devices, except Coast Guard approved intrinsically safe devices, shall be installed in these spaces. Electric motors shall be segregated from these spaces by a gastight bulkhead. Electric lighting of the...

  9. 30 CFR 57.19110 - Overhead protection for shaft deepening work.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    .... 57.19110 Section 57.19110 Mineral Resources MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR METAL AND NONMETAL MINE SAFETY AND HEALTH SAFETY AND HEALTH STANDARDS-UNDERGROUND METAL AND... substantial bulkhead or equivalent protection shall be provided above persons at work deepening a shaft. ...

  10. 30 CFR 56.19110 - Overhead protection for shaft deepening work.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    .... 56.19110 Section 56.19110 Mineral Resources MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR METAL AND NONMETAL MINE SAFETY AND HEALTH SAFETY AND HEALTH STANDARDS-SURFACE METAL AND NONMETAL... bulkhead or equivalent protection shall be provided above persons at work deepening a shaft. ...

  11. 77 FR 58761 - Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-09-24

    ... lightning strikes from causing certain parts to contact the airplane pitch control system, which could... lightning strike effects [could cause certain parts to contact the airplane pitch control system, which... a lightning strike hitting an airplane tail boom causing certain rear bulkhead parts to jam an...

  12. 77 FR 34876 - Airworthiness Directives; The Boeing Company

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-06-12

    ... (a flammable fluid leakage zone) or heat damage to the APU power feeder cable, insulation blankets... heat damage to the APU power feeder cable, insulation blankets, or pressure bulkhead. Relevant Service... feeder cable and heat damage of the insulation blanket adjacent to the clamp, a detailed inspection for...

  13. 46 CFR 151.13-5 - Cargo segregation-tanks.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... CARRYING BULK LIQUID HAZARDOUS MATERIAL CARGOES Cargo Segregation § 151.13-5 Cargo segregation—tanks. (a... design. (2) Segregation of cargo space from machinery spaces and other spaces which have or could have a... separating medium. ii=Double bulkhead, required. Cofferdam, empty tank, pumproom, tank with Grade E Liquid...

  14. 49 CFR 176.83 - Segregation.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... Requirements § 176.83 Segregation. (a) General. (1) The requirements of this section apply to all cargo spaces... presence of one or more steel bulkheads or decks between them or a combination thereof. Intervening spaces... peroxide type D, liquid; Organic peroxide type E, liquid; Organic peroxide type F, liquid; and (B...

  15. 49 CFR 176.83 - Segregation.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... Requirements § 176.83 Segregation. (a) General. (1) The requirements of this section apply to all cargo spaces... presence of one or more steel bulkheads or decks between them or a combination thereof. Intervening spaces... peroxide type D, liquid; Organic peroxide type E, liquid; Organic peroxide type F, liquid; and (B...

  16. 46 CFR 151.13-5 - Cargo segregation-tanks.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... CARRYING BULK LIQUID HAZARDOUS MATERIAL CARGOES Cargo Segregation § 151.13-5 Cargo segregation—tanks. (a... design. (2) Segregation of cargo space from machinery spaces and other spaces which have or could have a... separating medium. ii=Double bulkhead, required. Cofferdam, empty tank, pumproom, tank with Grade E Liquid...

  17. 46 CFR 151.13-5 - Cargo segregation-tanks.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... CARRYING BULK LIQUID HAZARDOUS MATERIAL CARGOES Cargo Segregation § 151.13-5 Cargo segregation—tanks. (a... design. (2) Segregation of cargo space from machinery spaces and other spaces which have or could have a... separating medium. ii=Double bulkhead, required. Cofferdam, empty tank, pumproom, tank with Grade E Liquid...

  18. 49 CFR 176.83 - Segregation.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... Requirements § 176.83 Segregation. (a) General. (1) The requirements of this section apply to all cargo spaces... presence of one or more steel bulkheads or decks between them or a combination thereof. Intervening spaces... peroxide type D, liquid; Organic peroxide type E, liquid; Organic peroxide type F, liquid; and (B...

  19. 46 CFR 69.121 - Engine room deduction.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... necessary for the safe operation and maintenance of the propelling machinery, the entire space, or, if... machinery space is not bulkheaded off or is larger than necessary for the safe operation and maintenance of... room deduction is either a percentage of the vessel's total propelling machinery spaces or a percentage...

  20. Vacuum/compression valving (VCV) using parrafin-wax on a centrifugal microfluidic CD platform.

    PubMed

    Al-Faqheri, Wisam; Ibrahim, Fatimah; Thio, Tzer Hwai Gilbert; Moebius, Jacob; Joseph, Karunan; Arof, Hamzah; Madou, Marc

    2013-01-01

    This paper introduces novel vacuum/compression valves (VCVs) utilizing paraffin wax. A VCV is implemented by sealing the venting channel/hole with wax plugs (for normally-closed valve), or to be sealed by wax (for normally-open valve), and is activated by localized heating on the CD surface. We demonstrate that the VCV provides the advantages of avoiding unnecessary heating of the sample/reagents in the diagnostic process, allowing for vacuum sealing of the CD, and clear separation of the paraffin wax from the sample/reagents in the microfluidic process. As a proof of concept, the microfluidic processes of liquid flow switching and liquid metering is demonstrated with the VCV. Results show that the VCV lowers the required spinning frequency to perform the microfluidic processes with high accuracy and ease of control.

  1. Vacuum/Compression Valving (VCV) Using Parrafin-Wax on a Centrifugal Microfluidic CD Platform

    PubMed Central

    Al-Faqheri, Wisam; Ibrahim, Fatimah; Thio, Tzer Hwai Gilbert; Moebius, Jacob; Joseph, Karunan; Arof, Hamzah; Madou, Marc

    2013-01-01

    This paper introduces novel vacuum/compression valves (VCVs) utilizing paraffin wax. A VCV is implemented by sealing the venting channel/hole with wax plugs (for normally-closed valve), or to be sealed by wax (for normally-open valve), and is activated by localized heating on the CD surface. We demonstrate that the VCV provides the advantages of avoiding unnecessary heating of the sample/reagents in the diagnostic process, allowing for vacuum sealing of the CD, and clear separation of the paraffin wax from the sample/reagents in the microfluidic process. As a proof of concept, the microfluidic processes of liquid flow switching and liquid metering is demonstrated with the VCV. Results show that the VCV lowers the required spinning frequency to perform the microfluidic processes with high accuracy and ease of control. PMID:23505528

  2. 12. DETAIL VIEW OF GENERATOR BAY, GENERATOR ROOM, SHOWING TURBINEGENERATOR ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    12. DETAIL VIEW OF GENERATOR BAY, GENERATOR ROOM, SHOWING TURBINE-GENERATOR DRIVE SHAFT IN FOREGROUND, ACCESS BULKHEAD TO TURBINE IN BACKGROUND - Nine Mile Hydroelectric Development, Powerhouse, State Highway 291 along Spokane River, Nine Mile Falls, Spokane County, WA

  3. 46 CFR 78.45-1 - When required.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... the following plans: (1) General arrangement plans showing for each deck the fire control stations, the various sections enclosed by fire-resisting bulkheads, together with particulars of the fire alarms, detecting systems, the sprinkler installation (if any), the fire extinguishing appliances, means...

  4. 46 CFR 78.45-1 - When required.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... the following plans: (1) General arrangement plans showing for each deck the fire control stations, the various sections enclosed by fire-resisting bulkheads, together with particulars of the fire alarms, detecting systems, the sprinkler installation (if any), the fire extinguishing appliances, means...

  5. 46 CFR 78.45-1 - When required.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... the following plans: (1) General arrangement plans showing for each deck the fire control stations, the various sections enclosed by fire-resisting bulkheads, together with particulars of the fire alarms, detecting systems, the sprinkler installation (if any), the fire extinguishing appliances, means...

  6. 46 CFR 78.45-1 - When required.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... the following plans: (1) General arrangement plans showing for each deck the fire control stations, the various sections enclosed by fire-resisting bulkheads, together with particulars of the fire alarms, detecting systems, the sprinkler installation (if any), the fire extinguishing appliances, means...

  7. 46 CFR 78.45-1 - When required.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... the following plans: (1) General arrangement plans showing for each deck the fire control stations, the various sections enclosed by fire-resisting bulkheads, together with particulars of the fire alarms, detecting systems, the sprinkler installation (if any), the fire extinguishing appliances, means...

  8. 1000471

    NASA Image and Video Library

    2010-03-30

    THE LEFT DOME WAS CREATED USING THE NEW MANUFACTURING PROCESSES AND ELIMINATES AT LEAST EIGHT MAJOR WELDS. THE WELD DEMARCATION LINES ARE VISIBLE ON THE TRADITIONAL FABRICATED TANK DONE ON THE RIGHT. THIS WAS PART OF THE FRICTION STIR COMMON BULKHEAD DOME UNVEILING CEREMONY IN BUILDING 4755

  9. 33. View aft of main deck, port side, taken from ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    33. View aft of main deck, port side, taken from just aft of forecastle bulkhead showing foremast, fore shrouds, pig house, midship house and boat skids. - Ship BALCLUTHA, 2905 Hyde Street Pier, San Francisco, San Francisco County, CA

  10. Zero-Totality in Action-Reaction Space:. A Generalization of Newton's Third Law?

    NASA Astrophysics Data System (ADS)

    Karam, Sabah E.

    2013-09-01

    In order to present the universe as a zero-totality the key concepts of nothingness and duality are required. Diaz and Rowlands introduce processes of conjugation, complexification, and dimensionalization using a universal alphabet and rewrite system to describe a physical universe composed of nilpotents. This paper will apply the concept of conjugation to the Newtonian duality actionreaction by introducing associated dual spaces called action space-reaction space. An attempt to generalize Newton's third law of motion, utilizing the concept of dual spaces, will follow in a manner suggestive of the zero-totality fermion-vacuum relationship.

  11. 46 CFR 131.945 - Display of plans.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... bulkheads together with particulars of the— (a) Fire-detection systems; (b) Manual-alarm systems; (c) Fire-extinguishing systems; (d) Fire doors; (e) Means of ingress to the different compartments; and (f) Ventilating-systems, including the— (1) Positions of the dampers; (2) Site of the remote means of stopping the fans...

  12. 46 CFR 72.05-35 - Hatch covers and shifting boards.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...-35 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PASSENGER VESSELS CONSTRUCTION AND ARRANGEMENT Structural Fire Protection § 72.05-35 Hatch covers and shifting boards. (a) Wood hatch... deck construction noted in tables 72.05-10 (f) and (g). (b) Tonnage openings in “A” Class bulkheads...

  13. 77 FR 57990 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-09-19

    ...'' chord of the bulkhead, the web located under the outer circumferential tear strap, the ``Z'' stiffeners..., dated December 16, 2011. (m) New Requirements: One-Time Inspection Under the Tear Strap Except as... the outer circumferential tear strap, or do a one-time HFEC inspection for cracks from the forward...

  14. 33 CFR Appendix B to Part 157 - Subdivision and Stability Assumptions

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... liquids from damaged compartments. (b) The permeabilities are assumed as follows: Intended space use... space located aft is involved in the damage assumption. The machinery space is calculated as a single... between adjacent transverse bulkheads except the machinery space. (b) The extent and the character of the...

  15. 33 CFR Appendix B to Part 157 - Subdivision and Stability Assumptions

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... liquids from damaged compartments. (b) The permeabilities are assumed as follows: Intended space use... space located aft is involved in the damage assumption. The machinery space is calculated as a single... between adjacent transverse bulkheads except the machinery space. (b) The extent and the character of the...

  16. 33 CFR Appendix B to Part 157 - Subdivision and Stability Assumptions

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... liquids from damaged compartments. (b) The permeabilities are assumed as follows: Intended space use... space located aft is involved in the damage assumption. The machinery space is calculated as a single... between adjacent transverse bulkheads except the machinery space. (b) The extent and the character of the...

  17. 33 CFR Appendix B to Part 157 - Subdivision and Stability Assumptions

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... liquids from damaged compartments. (b) The permeabilities are assumed as follows: Intended space use... space located aft is involved in the damage assumption. The machinery space is calculated as a single... between adjacent transverse bulkheads except the machinery space. (b) The extent and the character of the...

  18. 33 CFR Appendix B to Part 157 - Subdivision and Stability Assumptions

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... liquids from damaged compartments. (b) The permeabilities are assumed as follows: Intended space use... space located aft is involved in the damage assumption. The machinery space is calculated as a single... between adjacent transverse bulkheads except the machinery space. (b) The extent and the character of the...

  19. 46 CFR 190.07-10 - Construction.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... use of other suitable material in special cases, having in mind the risk of fire. (b) The boundary... bulkheads and decks separating the accomodations and control stations from hold and machinery spaces... square feet or less from accommodations and control stations shall be of “A-15” Class construction as...

  20. 29 CFR 1917.112 - Guarding of edges.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 29 Labor 7 2010-07-01 2010-07-01 false Guarding of edges. 1917.112 Section 1917.112 Labor... (CONTINUED) MARINE TERMINALS Terminal Facilities § 1917.112 Guarding of edges. (a) Vehicle protection. (1... provided at the waterside edges of aprons and bulkheads, except where vehicles are prohibited. Curbs or...

  1. 46 CFR 196.36-1 - When required.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... Plans § 196.36-1 When required. (a) All manned vessels shall have permanently exhibited for the guidance of the officer in charge of the vessel, general arrangement plans showing for each deck the various fire retardant bulkheads together with particulars of the fire-detecting, manual alarm and fire...

  2. 46 CFR 196.36-1 - When required.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... Plans § 196.36-1 When required. (a) All manned vessels shall have permanently exhibited for the guidance of the officer in charge of the vessel, general arrangement plans showing for each deck the various fire retardant bulkheads together with particulars of the fire-detecting, manual alarm and fire...

  3. 46 CFR 196.36-1 - When required.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... Plans § 196.36-1 When required. (a) All manned vessels shall have permanently exhibited for the guidance of the officer in charge of the vessel, general arrangement plans showing for each deck the various fire retardant bulkheads together with particulars of the fire-detecting, manual alarm and fire...

  4. 46 CFR 196.36-1 - When required.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... Plans § 196.36-1 When required. (a) All manned vessels shall have permanently exhibited for the guidance of the officer in charge of the vessel, general arrangement plans showing for each deck the various fire retardant bulkheads together with particulars of the fire-detecting, manual alarm and fire...

  5. 46 CFR 196.36-1 - When required.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... Plans § 196.36-1 When required. (a) All manned vessels shall have permanently exhibited for the guidance of the officer in charge of the vessel, general arrangement plans showing for each deck the various fire retardant bulkheads together with particulars of the fire-detecting, manual alarm and fire...

  6. Control of Postpartum Hemorrhage Using Vacuum-Induced Uterine Tamponade.

    PubMed

    Purwosunu, Yuditiya; Sarkoen, Widyastuti; Arulkumaran, Sabaratnam; Segnitz, Jan

    2016-07-01

    Postpartum hemorrhage is the leading cause of maternal mortality worldwide. Vacuum-induced uterine tamponade is a possible alternative approach to balloon tamponade systems for the treatment of postpartum hemorrhage resulting from atony. In a prospective proof-of-concept investigation of 10 women with vaginal deliveries in a hospital setting who failed first-line therapies for postpartum hemorrhage, tamponade was used. Vacuum-induced uterine tamponade was created through a device inserted transvaginally into the uterine cavity. An occlusion balloon built into the device shaft was inflated at the level of the external cervical os to create a uterine seal. Negative pressure was created by attaching a self-contained, mobile, electrically powered, pressure-regulated vacuum pump with a sterile graduated canister. In all 10 cases, the suction created an immediate seal at the cervical os, 50-250 mL of residual blood was evacuated from the uterine cavity, the uterus collapsed and regained tone within minutes, and hemorrhaging was controlled. The device remained in place for a minimum of 1 hour and up to 6.5 hours in one case while vaginal and perineal lacerations were easily repaired. This preliminary investigation suggests that a device designed to create vacuum-induced uterine tamponade may be a reasonable alternative to other devices used to treat atonic postpartum hemorrhage.

  7. 46 CFR 69.59 - Enclosed spaces.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 2 2012-10-01 2012-10-01 false Enclosed spaces. 69.59 Section 69.59 Shipping COAST... OF VESSELS Convention Measurement System § 69.59 Enclosed spaces. Enclosed space means a space which..., in a deck or in a covering of a space, or in the partitions or bulkheads of a space, nor the absence...

  8. 46 CFR 69.59 - Enclosed spaces.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 2 2013-10-01 2013-10-01 false Enclosed spaces. 69.59 Section 69.59 Shipping COAST... OF VESSELS Convention Measurement System § 69.59 Enclosed spaces. Enclosed space means a space which..., in a deck or in a covering of a space, or in the partitions or bulkheads of a space, nor the absence...

  9. 46 CFR 69.59 - Enclosed spaces.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 2 2014-10-01 2014-10-01 false Enclosed spaces. 69.59 Section 69.59 Shipping COAST... OF VESSELS Convention Measurement System § 69.59 Enclosed spaces. Enclosed space means a space which..., in a deck or in a covering of a space, or in the partitions or bulkheads of a space, nor the absence...

  10. 46 CFR 69.59 - Enclosed spaces.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 2 2011-10-01 2011-10-01 false Enclosed spaces. 69.59 Section 69.59 Shipping COAST... OF VESSELS Convention Measurement System § 69.59 Enclosed spaces. Enclosed space means a space which..., in a deck or in a covering of a space, or in the partitions or bulkheads of a space, nor the absence...

  11. 46 CFR 69.59 - Enclosed spaces.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 2 2010-10-01 2010-10-01 false Enclosed spaces. 69.59 Section 69.59 Shipping COAST... OF VESSELS Convention Measurement System § 69.59 Enclosed spaces. Enclosed space means a space which..., in a deck or in a covering of a space, or in the partitions or bulkheads of a space, nor the absence...

  12. Electrothermal fracturing of tensile specimens

    NASA Technical Reports Server (NTRS)

    Blinn, H. O.; Hanks, J. G.; Perkins, H. P.

    1970-01-01

    Pulling device consisting of structural tube, connecting rod, spring-loaded nuts, loading rod, heating element, and three bulkheads fractures tensile specimens. Alternate heating and cooling increases tensile loading by increments until fracturing occurs. Load cell or strain gage, applied to pulling rod, determines forces applied.

  13. 46 CFR 32.57-10 - Construction-TB/ALL.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ..., etc., over the steel. (6) Except for washrooms and toilet spaces, deck coverings within accommodation... accommodations and control stations from cargo, and machinery spaces and from galleys, main pantries and... apply within accommodation, service, and control spaces: (1) Corridor bulkheads in accommodation areas...

  14. 46 CFR 32.57-10 - Construction-TB/ALL.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ..., etc., over the steel. (6) Except for washrooms and toilet spaces, deck coverings within accommodation... accommodations and control stations from cargo, and machinery spaces and from galleys, main pantries and... apply within accommodation, service, and control spaces: (1) Corridor bulkheads in accommodation areas...

  15. 46 CFR 32.57-10 - Construction-TB/ALL.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ..., etc., over the steel. (6) Except for washrooms and toilet spaces, deck coverings within accommodation... accommodations and control stations from cargo, and machinery spaces and from galleys, main pantries and... apply within accommodation, service, and control spaces: (1) Corridor bulkheads in accommodation areas...

  16. 46 CFR 32.57-10 - Construction-TB/ALL.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ..., etc., over the steel. (6) Except for washrooms and toilet spaces, deck coverings within accommodation... accommodations and control stations from cargo, and machinery spaces and from galleys, main pantries and... apply within accommodation, service, and control spaces: (1) Corridor bulkheads in accommodation areas...

  17. 28. GRAIN TERMINAL/COLUMBIA STREET PIER/ALTERATIONS AND REPAIRS TO PIER SHED: ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    28. GRAIN TERMINAL/COLUMBIA STREET PIER/ALTERATIONS AND REPAIRS TO PIER SHED: WARM AREA - PLAN AND RETAILS (Drawing 2 of 7) - New York Barge Canal, Gowanus Bay Terminal Pier, East of bulkhead supporting Columbia Street, Brooklyn, Kings County, NY

  18. 33 CFR 155.470 - Prohibited spaces.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 2 2013-07-01 2013-07-01 false Prohibited spaces. 155.470... Prohibited spaces. (a) In a ship of 400 gross tons and above, for which the building contract is placed after... material in any space forward of a collision bulkhead except: (1) For a ship constructed after June 30...

  19. 33 CFR 155.470 - Prohibited spaces.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 2 2014-07-01 2014-07-01 false Prohibited spaces. 155.470... Prohibited spaces. (a) In a ship of 400 gross tons and above, for which the building contract is placed after... material in any space forward of a collision bulkhead except: (1) For a ship constructed after June 30...

  20. 33 CFR 155.470 - Prohibited spaces.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 2 2011-07-01 2011-07-01 false Prohibited spaces. 155.470... Prohibited spaces. (a) In a ship of 400 gross tons and above, for which the building contract is placed after... material in any space forward of a collision bulkhead except: (1) For a ship constructed after June 30...

  1. 33 CFR 155.470 - Prohibited spaces.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Prohibited spaces. 155.470... Prohibited spaces. (a) In a ship of 400 gross tons and above, for which the building contract is placed after... material in any space forward of a collision bulkhead except: (1) For a ship constructed after June 30...

  2. 33 CFR 155.470 - Prohibited spaces.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 2 2012-07-01 2012-07-01 false Prohibited spaces. 155.470... Prohibited spaces. (a) In a ship of 400 gross tons and above, for which the building contract is placed after... material in any space forward of a collision bulkhead except: (1) For a ship constructed after June 30...

  3. Recent advances and applications of gas chromatography vacuum ultraviolet spectroscopy.

    PubMed

    Santos, Inês C; Schug, Kevin A

    2017-01-01

    The vacuum ultraviolet spectrophotometer was developed recently as an alternative to existing gas chromatography detectors. This detector measures the absorption of gas-phase chemical species in the range of 120-240 nm, where all chemical compounds present unique absorption spectra. Therefore, qualitative analysis can be performed and quantification follows standard Beer-Lambert law principles. Different fields of application, such as petrochemical, food, and environmental analysis have been explored. Commonly demonstrated is the capability for facile deconvolution of co-eluting analytes. The concept of additive absorption for co-eluting analytes has also been advanced for classification and speciation of complex mixtures using a data treatment procedure termed time interval deconvolution. Furthermore, pseudo-absolute quantitation can be performed for system diagnosis, as well as potentially calibrationless quantitation. In this manuscript an overview of these features, the vacuum ultraviolet spectrophotometer instrumentation, and performance capabilities are given. A discussion of the applications of the vacuum ultraviolet detector is provided by describing and discussing the papers published thus far since 2014. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  4. Introduction to the magnet and vacuum systems of an electron storage ring

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    Weng, W.T.

    An accelerator or storage ring complex is a concerted interplay of various functional systems. For the convenience of discussion we can divide it into the following systems: injector, magnet, RF, vacuum, instrumentation and control. In addition, the conventional construction of the building and radiation safety consideration are also needed and finally the beam lines, detector, data acquisition and analysis set-ups for research programs. Dr. L. Teng has given a comprehensive review of the whole complex and the operation of such a facility. I concentrate on the description of magnet and vacuum systems. Only the general function of each system andmore » the basic design concepts will be introduced, no detailed engineering practice will be given which will be best done after a machine design is produced. For further understanding and references a table of bibliography is provided at the end of the paper.« less

  5. 49 CFR 176.83 - Segregation.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... Requirements § 176.83 Segregation. (a) General. (1) The requirements of this section apply to all cargo spaces... presence of one or more steel bulkheads or decks between them or a combination thereof. Intervening spaces... in a shelter-'tween deck cargo space is not considered to be “on deck” stowage. (10) Where the code...

  6. 49 CFR 176.83 - Segregation.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... Requirements § 176.83 Segregation. (a) General. (1) The requirements of this section apply to all cargo spaces... presence of one or more steel bulkheads or decks between them or a combination thereof. Intervening spaces... in a shelter-'tween deck cargo space is not considered to be “on deck” stowage. (10) Where the code...

  7. Automated Generation of Finite-Element Meshes for Aircraft Conceptual Design

    NASA Technical Reports Server (NTRS)

    Li, Wu; Robinson, Jay

    2016-01-01

    This paper presents a novel approach for automated generation of fully connected finite-element meshes for all internal structural components and skins of a given wing-body geometry model, controlled by a few conceptual-level structural layout parameters. Internal structural components include spars, ribs, frames, and bulkheads. Structural layout parameters include spar/rib locations in wing chordwise/spanwise direction and frame/bulkhead locations in longitudinal direction. A simple shell thickness optimization problem with two load conditions is used to verify versatility and robustness of the automated meshing process. The automation process is implemented in ModelCenter starting from an OpenVSP geometry and ending with a NASTRAN 200 solution. One subsonic configuration and one supersonic configuration are used for numerical verification. Two different structural layouts are constructed for each configuration and five finite-element meshes of different sizes are generated for each layout. The paper includes various comparisons of solutions of 20 thickness optimization problems, as well as discussions on how the optimal solutions are affected by the stress constraint bound and the initial guess of design variables.

  8. Flight demonstration of aircraft fuselage and bulkhead monitoring using optical fiber distributed sensing system

    NASA Astrophysics Data System (ADS)

    Wada, Daichi; Igawa, Hirotaka; Tamayama, Masato; Kasai, Tokio; Arizono, Hitoshi; Murayama, Hideaki; Shiotsubo, Katsuya

    2018-02-01

    We have developed an optical fiber distributed sensing system based on optical frequency domain reflectometry (OFDR) that uses long-length fiber Bragg gratings (FBGs). This technique obtains strain data not as a point data from an FBG but as a distributed profile within the FBG. This system can measure the strain distribution profile with an adjustable high spatial resolution of the mm or sub-mm order in real-time. In this study, we applied this OFDR-FBG technique to a flying test bed that is a mid-sized jet passenger aircraft. We conducted flight tests and monitored the structural responses of a fuselage stringer and the bulkhead of the flying test bed during flights. The strain distribution variations were successfully monitored for various events including taxiing, takeoff, landing and several other maneuvers. The monitoring was effective not only for measuring the strain amplitude applied to the individual structural parts but also for understanding the characteristics of the structural responses in accordance with the flight maneuvers. We studied the correlations between various maneuvers and strains to explore the relationship between the operation and condition of aircraft.

  9. 46 CFR 32.63-20 - Hull structure-B/ALL.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... condition such that the forward rake bulkhead rests upon a pinnacle at the water surface, the maximum hull bending stress shall not exceed the following limits: (1) Independent tanks may be installed in such a... stress shall not exceed either 50 percent of the minimum ultimate tensile strength of the material or 70...

  10. 46 CFR 171.118 - Automatic ventilators and side ports.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 7 2011-10-01 2011-10-01 false Automatic ventilators and side ports. 171.118 Section... SPECIAL RULES PERTAINING TO VESSELS CARRYING PASSENGERS Openings in the Side of a Vessel Below the Bulkhead or Weather Deck § 171.118 Automatic ventilators and side ports. (a) An automatic ventilator must...

  11. 46 CFR 171.118 - Automatic ventilators and side ports.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Automatic ventilators and side ports. 171.118 Section... SPECIAL RULES PERTAINING TO VESSELS CARRYING PASSENGERS Openings in the Side of a Vessel Below the Bulkhead or Weather Deck § 171.118 Automatic ventilators and side ports. (a) An automatic ventilator must...

  12. 46 CFR 171.118 - Automatic ventilators and side ports.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 7 2014-10-01 2014-10-01 false Automatic ventilators and side ports. 171.118 Section... SPECIAL RULES PERTAINING TO VESSELS CARRYING PASSENGERS Openings in the Side of a Vessel Below the Bulkhead or Weather Deck § 171.118 Automatic ventilators and side ports. (a) An automatic ventilator must...

  13. 46 CFR 171.118 - Automatic ventilators and side ports.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 7 2012-10-01 2012-10-01 false Automatic ventilators and side ports. 171.118 Section... SPECIAL RULES PERTAINING TO VESSELS CARRYING PASSENGERS Openings in the Side of a Vessel Below the Bulkhead or Weather Deck § 171.118 Automatic ventilators and side ports. (a) An automatic ventilator must...

  14. 46 CFR 171.118 - Automatic ventilators and side ports.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 7 2013-10-01 2013-10-01 false Automatic ventilators and side ports. 171.118 Section... SPECIAL RULES PERTAINING TO VESSELS CARRYING PASSENGERS Openings in the Side of a Vessel Below the Bulkhead or Weather Deck § 171.118 Automatic ventilators and side ports. (a) An automatic ventilator must...

  15. 46 CFR 56.50-50 - Bilge and ballast piping.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... defined in 49 CFR part 173, in enclosed cargo spaces, the bilge-pumping system must be designed to ensure against inadvertent pumping of such liquids through machinery-space piping or pumps. (5) For each vessel... enclosed cargo spaces on either the bulkhead deck of a passenger vessel or the freeboard deck of a cargo...

  16. 46 CFR 56.50-50 - Bilge and ballast piping.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... defined in 49 CFR part 173, in enclosed cargo spaces, the bilge-pumping system must be designed to ensure against inadvertent pumping of such liquids through machinery-space piping or pumps. (5) For each vessel... enclosed cargo spaces on either the bulkhead deck of a passenger vessel or the freeboard deck of a cargo...

  17. 46 CFR 56.50-50 - Bilge and ballast piping.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... defined in 49 CFR part 173, in enclosed cargo spaces, the bilge-pumping system must be designed to ensure against inadvertent pumping of such liquids through machinery-space piping or pumps. (5) For each vessel... enclosed cargo spaces on either the bulkhead deck of a passenger vessel or the freeboard deck of a cargo...

  18. 46 CFR 56.50-50 - Bilge and ballast piping.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... defined in 49 CFR part 173, in enclosed cargo spaces, the bilge-pumping system must be designed to ensure against inadvertent pumping of such liquids through machinery-space piping or pumps. (5) For each vessel... enclosed cargo spaces on either the bulkhead deck of a passenger vessel or the freeboard deck of a cargo...

  19. 77 FR 38547 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-06-28

    ... tear strap, in the web near the dome cap, and in the ``Z'' stiffeners near the dome cap. Cracks have... of the web located under the outer circumferential tear strap, or a one-time HFEC inspection to... tear strap. A detailed inspection from the aft side of the bulkhead for oil-canning, and related...

  20. 46 CFR 28.580 - Unintentional flooding.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... INDUSTRY VESSELS Stability § 28.580 Unintentional flooding. (a) Applicability. Except for an open boat that... means to rapidly make it watertight which is operable from a location aft of the collision bulkhead; (4... penetration must be assumed: (1) Longitudinal extent—L/10, or 10 feet (3.05 meters) plus 0.03L, whichever is...

  1. 46 CFR 116.423 - Furniture and furnishings.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... Systems Using a Radiant Heat Energy Source,” and with a specific optical density not to exceed 450 in both...) “Specific Optical Density of Smoke generated by Solid Materials.” Also: (i) Rugs and carpets shall not extend up bulkheads or vertical surfaces more than 10 centimeters (4 inches) above the deck. (ii) Rugs...

  2. 46 CFR 116.423 - Furniture and furnishings.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... Systems Using a Radiant Heat Energy Source,” and with a specific optical density not to exceed 450 in both...) “Specific Optical Density of Smoke generated by Solid Materials.” Also: (i) Rugs and carpets shall not extend up bulkheads or vertical surfaces more than 10 centimeters (4 inches) above the deck. (ii) Rugs...

  3. 46 CFR 116.423 - Furniture and furnishings.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... Systems Using a Radiant Heat Energy Source,” and with a specific optical density not to exceed 450 in both...) “Specific Optical Density of Smoke generated by Solid Materials.” Also: (i) Rugs and carpets shall not extend up bulkheads or vertical surfaces more than 10 centimeters (4 inches) above the deck. (ii) Rugs...

  4. Nearly Seamless Vacuum-Insulated Boxes

    NASA Technical Reports Server (NTRS)

    Stepanian, Christopher J.; Ou, Danny; Hu, Xiangjun

    2010-01-01

    A design concept, and a fabrication process that would implement the design concept, have been proposed for nearly seamless vacuum-insulated boxes that could be the main structural components of a variety of controlled-temperature containers, including common household refrigerators and insulating containers for shipping foods. In a typical case, a vacuum-insulated box would be shaped like a rectangular parallelepiped conventional refrigerator box having five fully closed sides and a hinged door on the sixth side. Although it is possible to construct the five-closed-side portion of the box as an assembly of five unitary vacuum-insulated panels, it is not desirable to do so because the relatively high thermal conductances of the seams between the panels would contribute significant amounts of heat leakage, relative to the leakage through the panels themselves. In contrast, the proposal would make it possible to reduce heat leakage by constructing the five-closed-side portion of the box plus the stationary portion (if any) of the sixth side as a single, seamless unit; the only remaining seam would be the edge seal around the door. The basic cross-sectional configuration of each side of a vacuum-insulated box according to the proposal would be that of a conventional vacuum-insulated panel: a low-density, porous core material filling a partially evacuated space between face sheets. However, neither the face sheets nor the core would be conventional. The face sheets would be opposite sides of a vacuum bag. The core material would be a flexible polymer-modified silica aerogel of the type described in Silica/Polymer and Silica/Polymer/Fiber Composite Aero - gels (MSC-23736) in this issue of NASA Tech Briefs. As noted in that article, the stiffness of this core material against compression is greater than that of prior aerogels. This is an important advantage because it translates to greater retention of thickness and, hence, of insulation performance when pressure is applied across the thickness, in particular, when the space between the face sheets is evacuated, causing the core material to be squeezed between the face sheets by atmospheric pressure. Fabrication of a typical vacuum-insulated box according to the proposal would begin with fabrication of a cross-shaped polymer-modified aerogel blanket. The dimensions of the cross would be chosen so that (1) the central rectangular portion of the cross would form the core for the back of the box and (2) the arms of the cross could be folded 90 from the back plane to form the cores of the adjacent four sides of the box. Optionally, the blanket could include tabs for joining the folded sides of the blanket along mating edges and tabs that could serve as hinges for the door. Vacuum bags in the form of similar five-sided boxes would be made of a suitable polymeric film, one bag to fit the outer core surface, the other to fit the inner core surface. By use of commercially available film-sealing equipment, these box-shaped bags would be seamed together to form a single vacuum bag encasing the box-shaped core. Also, a one-way valve would be sealed to the bag. Through this valve, the interior of the bag would be evacuated to a pressure between 1 and 10 torr (approximately between 0.13 and 1.3 kPa). The polymer-modified aerogel core material is known to perform well as a thermal insulator in such a partial vacuum.

  5. Roles of vacuum tunnelling and contact mechanics in single-molecule thermopower

    NASA Astrophysics Data System (ADS)

    Tsutsui, Makusu; Yokota, Kazumichi; Morikawa, Takanori; Taniguchi, Masateru

    2017-03-01

    Molecular junction is a chemically-defined nanostructure whose discrete electronic states are expected to render enhanced thermoelectric figure of merit suitable for energy-harvesting applications. Here, we report on geometrical dependence of thermoelectricity in metal-molecule-metal structures. We performed simultaneous measurements of the electrical conductance and thermovoltage of aromatic molecules having different anchoring groups at room temperature in vacuum. We elucidated the mutual contributions of vacuum tunnelling on thermoelectricity in the short molecular bridges. We also found stretching-induced thermoelectric voltage enhancement in thiol-linked single-molecule bridges along with absence of the pulling effects in diamine counterparts, thereby suggested that the electromechanical effect would be a rather universal phenomenon in Au-S anchored molecular junctions that undergo substantial metal-molecule contact elongation upon stretching. The present results provide a novel concept for molecular design to achieve high thermopower with single-molecule junctions.

  6. 18 CFR 367.55 - Land and land rights.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...) Where special assessments for public improvements provide for deferred payments, the full amount of the... rights are as follows: (1) Bulkheads, buried, not requiring maintenance or replacement. (2) Cost, first... levied to provide for the maintenance of such improvements. (11) Surveys in connection with the...

  7. 49 CFR 572.77 - Instrumentation.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... the sensitive axes of the three accelerometers intersect at the point in the midsagittal plane located... pins in either side of the dummy's head with the head's midsagittal plane. (2) The head has three... is perpendicular to the horizontal bulkhead in the midsagittal plane. (ii) Align the second...

  8. Use of Vacuum Bagging for Fabricating Thermoplastic Microfluidic Devices

    PubMed Central

    Cassano, Christopher L.; Simon, Andrew J.; Liu, Wei; Fredrickson, Carl; Fan, Z. Hugh

    2014-01-01

    In this work we present a novel thermal bonding method for thermoplastic microfluidic devices. This simple method employs a modified vacuum bagging technique, a concept borrowed from the aerospace industry, to produce conventional thick substrate microfluidic devices, as well as multi-layer film devices. The bonds produced using this method are superior to those obtained using conventional thermal bonding methods, including thermal lamination, and are capable of sustaining burst pressures in excess of 550 kPa. To illustrate the utility of this method, thick substrate devices were produced, as well as a six-layer film device that incorporated several complex features. PMID:25329244

  9. 46 CFR 175.400 - Definitions of terms used in this subchapter.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... designated in § 1.01 of this chapter.; Consideration means an economic benefit, inducement, right, or profit... stability criteria and means: (1) Waters, except the Great Lakes, more than 20 nautical miles from a harbor... bulkhead that must be maintained watertight in order for the vessel to meet the damage stability and...

  10. 46 CFR 131.893 - Watertight doors and watertight hatches.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Watertight doors and watertight hatches. 131.893 Section... hatches. Each watertight door in a bulkhead that must be watertight in compliance with the requirements in part 174 of this chapter, and each watertight hatch, must be marked on both sides in letters at least...

  11. 46 CFR 131.893 - Watertight doors and watertight hatches.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 4 2012-10-01 2012-10-01 false Watertight doors and watertight hatches. 131.893 Section... hatches. Each watertight door in a bulkhead that must be watertight in compliance with the requirements in part 174 of this chapter, and each watertight hatch, must be marked on both sides in letters at least...

  12. 46 CFR 131.893 - Watertight doors and watertight hatches.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 4 2011-10-01 2011-10-01 false Watertight doors and watertight hatches. 131.893 Section... hatches. Each watertight door in a bulkhead that must be watertight in compliance with the requirements in part 174 of this chapter, and each watertight hatch, must be marked on both sides in letters at least...

  13. 46 CFR 131.893 - Watertight doors and watertight hatches.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 4 2013-10-01 2013-10-01 false Watertight doors and watertight hatches. 131.893 Section... hatches. Each watertight door in a bulkhead that must be watertight in compliance with the requirements in part 174 of this chapter, and each watertight hatch, must be marked on both sides in letters at least...

  14. 46 CFR 131.893 - Watertight doors and watertight hatches.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 4 2014-10-01 2014-10-01 false Watertight doors and watertight hatches. 131.893 Section... hatches. Each watertight door in a bulkhead that must be watertight in compliance with the requirements in part 174 of this chapter, and each watertight hatch, must be marked on both sides in letters at least...

  15. 75 FR 43105 - Airworthiness Directives; PIAGGIO AERO INDUSTRIES S.p.A Model PIAGGIO P-180 Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-07-23

    ... beams and the rear pressurized bulkhead. If left uncorrected, long term fatigue stress could locally... term fatigue stress could locally weaken the structure, compromising the fuselage structural integrity... reviewed the MCAI and related service information and, in general, agree with their substance. But we might...

  16. 46 CFR 72.05-25 - Doors, other than watertight.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... bulkheads required to be Class A-0 shall be of solid or hollow steel or equivalent metal construction... top of approved deck covering. Rugs, and carpets, shall not pass through doorways, but linoleum and... 1/2 inch door stop at the sides and top, except: (i) Double doors capable of independent operation...

  17. 46 CFR 72.05-25 - Doors, other than watertight.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... bulkheads required to be Class A-0 shall be of solid or hollow steel or equivalent metal construction... top of approved deck covering. Rugs, and carpets, shall not pass through doorways, but linoleum and... 1/2 inch door stop at the sides and top, except: (i) Double doors capable of independent operation...

  18. 46 CFR 72.05-25 - Doors, other than watertight.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... bulkheads required to be Class A-0 shall be of solid or hollow steel or equivalent metal construction... top of approved deck covering. Rugs, and carpets, shall not pass through doorways, but linoleum and... 1/2 inch door stop at the sides and top, except: (i) Double doors capable of independent operation...

  19. 46 CFR 71.25-25 - Hull equipment.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 3 2010-10-01 2010-10-01 false Hull equipment. 71.25-25 Section 71.25-25 Shipping COAST... Inspection § 71.25-25 Hull equipment. (a) At each annual inspection, the inspector shall conduct the following tests and inspections of hull equipment: (1) All subdivision bulkheads shall be examined to...

  20. 46 CFR 42.13-15 - Definitions of terms.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... of the midship section is of a hollow character, or where thick garboards are fitted, the distance is... provided by the actual midship section. (g) Block coefficient. The block coefficient (C b) is given by C b... the superstructures by alternative means, which are available at all times when bulkhead openings are...

  1. 46 CFR 42.13-15 - Definitions of terms.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... of the midship section is of a hollow character, or where thick garboards are fitted, the distance is... provided by the actual midship section. (g) Block coefficient. The block coefficient (C b) is given by C b... the superstructures by alternative means, which are available at all times when bulkhead openings are...

  2. 46 CFR 170.270 - Door design, operation, installation, and testing.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 7 2012-10-01 2012-10-01 false Door design, operation, installation, and testing. 170.270 Section 170.270 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SUBDIVISION AND STABILITY STABILITY REQUIREMENTS FOR ALL INSPECTED VESSELS Watertight Bulkhead Doors § 170.270 Door design, operation, installation, and testing. (a...

  3. 46 CFR 170.270 - Door design, operation, installation, and testing.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 7 2014-10-01 2014-10-01 false Door design, operation, installation, and testing. 170.270 Section 170.270 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SUBDIVISION AND STABILITY STABILITY REQUIREMENTS FOR ALL INSPECTED VESSELS Watertight Bulkhead Doors § 170.270 Door design, operation, installation, and testing. (a...

  4. 46 CFR 170.270 - Door design, operation, installation, and testing.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 7 2013-10-01 2013-10-01 false Door design, operation, installation, and testing. 170.270 Section 170.270 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SUBDIVISION AND STABILITY STABILITY REQUIREMENTS FOR ALL INSPECTED VESSELS Watertight Bulkhead Doors § 170.270 Door design, operation, installation, and testing. (a...

  5. Benefit from NASA

    NASA Image and Video Library

    2004-04-15

    During the Apollo era Marshall Space Flight Center's engineers developed the Magnetomotive Hammer to remove distortions from Saturn V bulkhead gore segments. Using an intense magnetic field, the Hammer removed manufacturing distortions from rejected segments which otherwise would have been discarded at a cost of $30,000 each. Various automobile, ship and aircraft manufacturers adoped the technology for commercial use.

  6. 46 CFR 78.47-35 - Fire doors.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 3 2010-10-01 2010-10-01 false Fire doors. 78.47-35 Section 78.47-35 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PASSENGER VESSELS OPERATIONS Markings for Fire and Emergency Equipment, Etc. § 78.47-35 Fire doors. (a) All doors in main vertical zone bulkheads or stairway...

  7. 75 FR 39189 - Airworthiness Directives; The Boeing Company Model 747 Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-07-08

    ... cracking in the body skin and the skin splice plate; for certain airplanes, an inspection for steel cross... inspections for cracking of the bulkhead frame web and body skin; and corrective actions if necessary. This... modification doublers; and, for certain airplanes, and a one-time external general visual inspection for steel...

  8. 46 CFR 36.05-10 - Protection of personnel-TB/ALL.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 1 2011-10-01 2011-10-01 false Protection of personnel-TB/ALL. 36.05-10 Section 36.05-10 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY TANK VESSELS ELEVATED TEMPERATURE CARGOES Cargo Tanks § 36.05-10 Protection of personnel—TB/ALL. (a) Decks, bulkheads, or other structures shall...

  9. 46 CFR 36.05-10 - Protection of personnel-TB/ALL.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 1 2010-10-01 2010-10-01 false Protection of personnel-TB/ALL. 36.05-10 Section 36.05-10 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY TANK VESSELS ELEVATED TEMPERATURE CARGOES Cargo Tanks § 36.05-10 Protection of personnel—TB/ALL. (a) Decks, bulkheads, or other structures shall...

  10. Evaluation of Insulation Materials and Combinations for Bulkhead Fire Protection

    DTIC Science & Technology

    1982-01-20

    fire. (This evaluation condition was suggested by Mr. J. Morris to Mr. R. C. Manahan of Johns - Manville during a visit by Mr. Manahan to the Naval Ship...and Concord Pike Wilmington, Delaware 19897 Telephone: (302) 575-3000 5. Johns - Manville Corporation CERAFELT, CERABLANKET P. 0. Box 5108 Flexible MIN

  11. 46 CFR 56.50-1 - General (replaces 122).

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... suitably insulated where necessary to preclude injury to personnel. (l) Where pipes are run through dry cargo spaces they must be protected from mechanical injury by a suitable enclosure or other means. [CGFR... bulkheads of tankships may be used if approved by the Marine Safety Center. (d) Piping shall not be run over...

  12. 77 FR 37332 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-06-21

    ... the high frequency eddy current inspection for cracking of the critical fastener holes, and repair if... of the bulkhead, and repair if necessary; and proposed an option to the high frequency eddy current...-15152 (72 FR 44753, August 9, 2007)), do a high frequency eddy current (HFEC) inspection for cracking of...

  13. 46 CFR 164.008-4 - Test requirements.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 6 2014-10-01 2014-10-01 false Test requirements. 164.008-4 Section 164.008-4 Shipping...: SPECIFICATIONS AND APPROVAL MATERIALS Bulkhead Panels § 164.008-4 Test requirements. (a) Thermal insulation: The insulation value of the specimens for the full scale test shall be such that the average temperature of...

  14. 46 CFR 164.008-5 - Test report.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 6 2014-10-01 2014-10-01 false Test report. 164.008-5 Section 164.008-5 Shipping COAST...: SPECIFICATIONS AND APPROVAL MATERIALS Bulkhead Panels § 164.008-5 Test report. (a) The test report required by... test. (3) Test conditions and date of test. (4) Description of the panel tested giving size, thickness...

  15. 78 FR 28125 - Airworthiness Directives; Twin Commander Aircraft LLC Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-14

    ...), DOT. ACTION: Final rule; request for comments. SUMMARY: We are adopting a new airworthiness directive... channels, left- and right-hand wing main spar frame support channels, and aft pressure bulkhead web. This... Floor, Room W12-140, 1200 New Jersey Avenue SE., Washington, DC 20590. Hand Delivery: U.S. Department of...

  16. 46 CFR 72.05-10 - Type, location, and construction of fire control bulkheads and decks.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 500 square feet with combustible furnishings Washrooms toilet spaces, and isolated pantries with... square feet with combustible furnishings 7 A-60 A-0 A-60 A-60 A-60 A-0 A-0 Washrooms, toilet spaces, and... 500 square feet with combustible furnishings Washrooms toilet spaces, and isolated pantries with...

  17. 46 CFR 72.05-10 - Type, location, and construction of fire control bulkheads and decks.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 500 square feet with combustible furnishings Washrooms toilet spaces, and isolated pantries with... square feet with combustible furnishings 7 A-60 A-0 A-60 A-60 A-60 A-0 A-0 Washrooms, toilet spaces, and... 500 square feet with combustible furnishings Washrooms toilet spaces, and isolated pantries with...

  18. 46 CFR 72.05-10 - Type, location, and construction of fire control bulkheads and decks.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 500 square feet with combustible furnishings Washrooms toilet spaces, and isolated pantries with... square feet with combustible furnishings 7 A-60 A-0 A-60 A-60 A-60 A-0 A-0 Washrooms, toilet spaces, and... 500 square feet with combustible furnishings Washrooms toilet spaces, and isolated pantries with...

  19. 46 CFR 116.435 - Doors.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... boundary in which the doors are fitted; (5) Door frames must be of rigid construction and provide at least... inches) square. A self-closing hinged or pivoted steel or equivalent material cover must be fitted in the...) A door in a bulkhead required to be A-60, A-30, or A-15 Class must be of hollow steel or equivalent...

  20. 46 CFR 116.435 - Doors.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... boundary in which the doors are fitted; (5) Door frames must be of rigid construction and provide at least... inches) square. A self-closing hinged or pivoted steel or equivalent material cover must be fitted in the...) A door in a bulkhead required to be A-60, A-30, or A-15 Class must be of hollow steel or equivalent...

  1. 46 CFR 42.13-15 - Definitions of terms.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... line of the frame in a vessel with a metal shell and to the outer surface of the hull in a vessel with... vessel with a metal shell, and is the volume of displacement to the outer surface of the hull in a vessel... between the machinery space and peak bulkheads and continuous athwartships. When this lower deck is...

  2. 46 CFR 42.13-15 - Definitions of terms.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... line of the frame in a vessel with a metal shell and to the outer surface of the hull in a vessel with... vessel with a metal shell, and is the volume of displacement to the outer surface of the hull in a vessel... between the machinery space and peak bulkheads and continuous athwartships. When this lower deck is...

  3. Vacuum-assisted closure as a surgical assistant in life-threatening necrotizing fasciitis in children

    PubMed Central

    Al-Subhi, FS; Zuker, RM; Cole, WG

    2010-01-01

    Necrotizing fasciitis is a severe soft tissue infection that can involve skin, subcutaneous fat, fascia and muscle. It can result in devastating sequelae including tissue necrosis, sepsis, toxic shock syndrome, cardiopulmonary collapse and death. To control rapidly spreading necrosis, early diagnosis and aggressive surgical treatment with extensive radical debridement of the affected areas is necessary, as well as systemic administration of broad-spectrum antimicrobials and, very often, intensive care support. The subatmospheric negative pressure dressing has been previously used in acute and complex wounds management. The concept of using vacuum-assisted closure dressing as another management component is presented in the current article. PMID:22131841

  4. Deployment of Lightweight Shock Mitigating Boat Manufacturing Innovation

    DTIC Science & Technology

    2012-12-21

    70 LC1- AMI- Z Displacement- Deck ~ HHH ~EEE~~~~~~~ ~~~~!!!!!!~5...between bulkheads Applied to two panels and included stringer 69 LC1- AMI-10 psi Pressure Load 70 LC1- AMI- Z Displacement- Deck ~ HHH ~EEE

  5. 13. DETAIL VIEW, OF TAINTER GATE PIER, SHOWING RECESSES FOR ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    13. DETAIL VIEW, OF TAINTER GATE PIER, SHOWING RECESSES FOR EMERGENCY BULKHEADS AND DOGGING DEVICES, LOOKING SOUTHEAST (DOWN FACE). UPSTREAM FACE OF TAINTER GATE IS VISIBLE IN UPPER RIGHT CORNER - Upper Mississippi River 9-Foot Channel Project, Lock & Dam 26R, Alton, Madison County, IL

  6. 77 FR 71731 - Airworthiness Directives; The Boeing Company

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-04

    ... inability of the forward engine mount bulkhead fittings to carry engine loads, resulting in the loss or... to carry engine loads, resulting in the loss or departure of an engine. Hydraulic embrittlement could... DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA-2012...

  7. 12. VIEW AFT IN MAIN HOLD OF THE EVELINA M. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    12. VIEW AFT IN MAIN HOLD OF THE EVELINA M. GOULART. OPENING IN THE BULKHEAD WAS CUT TO IMPROVE ACCESS TO ENGINE ROOM SO THAT ENGINE COULD BE REMOVED. - Auxiliary Fishing Schooner "Evelina M. Goulart", Essex Shipbuilding Museum, 66 Main Street, Essex, Essex County, MA

  8. 22. VIEW SHOWING CREW'S QUARTERS IN FORECASTLE, LOOKING FORWARD FROM ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    22. VIEW SHOWING CREW'S QUARTERS IN FORECASTLE, LOOKING FORWARD FROM DOOR IN PORT SIDE OF BULKHEAD; BUNK FRAME, (LEFT IN VIEW), REMAINS OF SMALL CAST IRON STOVE NEAR DECK STANCHION (CENTER OF VIEW) - Bugeye "Louise Travers", Intersection of Routes 2 & 4, Solomons, Calvert County, MD

  9. INTERIOR OF SOUTHEAST SIDE ENTRY CORRIDOR, SHOWING BLASTRESISTANT AND GASTIGHT ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    INTERIOR OF SOUTHEAST SIDE ENTRY CORRIDOR, SHOWING BLAST-RESISTANT AND GAS-TIGHT DOOR. NOTE RELIEF VALVES NEAR BOTTOM OF DOOR AND ALTERED ONE IN BULKHEAD. - U.S. Naval Base, Pearl Harbor, Bombproof Personnel Shelter, Enterprise Street and St. Lo Avenue, Pearl City, Honolulu County, HI

  10. 46 CFR 72.05-10 - Type, location, and construction of fire control bulkheads and decks.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... public spaces with incombustible veneers and trim and fire resistant furnishings Staterooms and public spaces of 500 square feet or less with combustible furnishings and isolated storerooms Public spaces over... and all public spaces with incombustible veneers and trim and fire resistant furnishings 5 A-15 A-15 A...

  11. 46 CFR 171.116 - Port lights.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Port lights. 171.116 Section 171.116 Shipping COAST... Port lights. (a) A vessel may have port lights below the bulkhead deck if— (1) It is greater than 150 gross tons; and (2) It is in ocean service. (b) All port lights in a space must be non-opening if the...

  12. 46 CFR 171.116 - Port lights.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 7 2012-10-01 2012-10-01 false Port lights. 171.116 Section 171.116 Shipping COAST... Port lights. (a) A vessel may have port lights below the bulkhead deck if— (1) It is greater than 150 gross tons; and (2) It is in ocean service. (b) All port lights in a space must be non-opening if the...

  13. 46 CFR 171.116 - Port lights.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 7 2013-10-01 2013-10-01 false Port lights. 171.116 Section 171.116 Shipping COAST... Port lights. (a) A vessel may have port lights below the bulkhead deck if— (1) It is greater than 150 gross tons; and (2) It is in ocean service. (b) All port lights in a space must be non-opening if the...

  14. 46 CFR 171.116 - Port lights.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 7 2011-10-01 2011-10-01 false Port lights. 171.116 Section 171.116 Shipping COAST... Port lights. (a) A vessel may have port lights below the bulkhead deck if— (1) It is greater than 150 gross tons; and (2) It is in ocean service. (b) All port lights in a space must be non-opening if the...

  15. 46 CFR 171.116 - Port lights.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 7 2014-10-01 2014-10-01 false Port lights. 171.116 Section 171.116 Shipping COAST... Port lights. (a) A vessel may have port lights below the bulkhead deck if— (1) It is greater than 150 gross tons; and (2) It is in ocean service. (b) All port lights in a space must be non-opening if the...

  16. 46 CFR 39.30-1 - Operational requirements-TB/ALL.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... oxygen content of each area of that tank formed by each partial bulkhead must be measured at a point one... the requirements of this part. (b) The pressure drop through the vapor collection system from the most... rate versus the pressure drop. (c) If a vessel carries vapor hoses, the pressure drop through the hoses...

  17. Space Research Results Purify Semiconductor Materials

    NASA Technical Reports Server (NTRS)

    2010-01-01

    While President Obama's news that NASA would encourage private companies to develop vehicles to take NASA into space may have come as a surprise to some, NASA has always encouraged private companies to invest in space. More than two decades ago, NASA established Commercial Space Centers across the United States to encourage industry to use space as a place to conduct research and to apply NASA technology to Earth applications. Although the centers are no longer funded by NASA, the advances enabled by that previous funding are still impacting us all today. For example, the Space Vacuum Epitaxy Center (SVEC) at the University of Houston, one of the 17 Commercial Space Centers, had a mission to create advanced thin film semiconductor materials and devices through the use of vacuum growth technologies both on Earth and in space. Making thin film materials in a vacuum (low-pressure environment) is advantageous over making them in normal atmospheric pressures, because contamination floating in the air is lessened in a vacuum. To grow semiconductor crystals, researchers at SVEC utilized epitaxy the process of depositing a thin layer of material on top of another thin layer of material. On Earth, this process took place in a vacuum chamber in a clean room lab. For space, the researchers developed something called the Wake Shield Facility (WSF), a 12-foot-diameter disk-shaped platform designed to grow thin film materials using the low-pressure environment in the wake of the space shuttle. Behind an orbiting space shuttle, the vacuum levels are thousands of times better than in the best vacuum chambers on Earth. Throughout the 1990s, the WSF flew on three space shuttle missions as a series of proof-of-concept missions. These experiments are a lasting testament to the success of the shuttle program and resulted in the development of the first thin film materials made in the vacuum of space, helping to pave the way for better thin film development on Earth.

  18. Compact, compression-free, displaceable, and resealable vacuum feedthrough with built-in strain relief for sensitive components such as optical fibers.

    PubMed

    Buchholz, B; Ebert, V

    2014-05-01

    For the direct fiber coupling of small optical measurement cells, we developed a new compact vacuum feedthrough for glass fibers and other similarly shaped objects that are compact and that offer the possibility of adjusting the fiber in longitudinal and in circular direction. The feedthrough assembly avoids compression or torsion on the fiber and thus protects, e.g., highly frangible fiber materials. In the following, we will present a brief simulation of the tightness requirements for low-pressure and low-concentration water vapor measurements and we will explain an integrated concept for a displaceable and self-adjustable, compression-free, compact, ultra-high vacuum, resealable feedthrough with good strain relief. The feedthrough has been successfully tested in a laboratory test facility and in several extractive airborne tunable diode laser absorption spectroscopy hygrometers. The leakage rate of the feedthrough presented here was tested via a helium leak searcher and was quantified further in an 8-week vacuum measurement campaign. The leakage rate is determined to be 0.41 ± 0.04 × 10(-9) hPa l/s, which--to our knowledge--is the first time a leakage rate for such a feedthrough has been quantified.

  19. 49 CFR 178.348-2 - Material and thickness of material.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... Bulkheads and Baffles When Used as Tank Reinforcement) Using Mild Steel (MS), High Strength Low Alloy Steel (HSLA), Austenitic Stainless Steel (SS), or Aluminum (AL)—Expressed in Decimals of an Inch After Forming... Steel (MS), High Strength Low Alloy Steel (HSLA), Austenitic Stainless Steel (SS), or Aluminum (AL...

  20. 49 CFR 178.348-2 - Material and thickness of material.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... Bulkheads and Baffles When Used as Tank Reinforcement) Using Mild Steel (MS), High Strength Low Alloy Steel (HSLA), Austenitic Stainless Steel (SS), or Aluminum (AL)—Expressed in Decimals of an Inch After Forming... Steel (MS), High Strength Low Alloy Steel (HSLA), Austenitic Stainless Steel (SS), or Aluminum (AL...

  1. 49 CFR 178.348-2 - Material and thickness of material.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... Bulkheads and Baffles When Used as Tank Reinforcement) Using Mild Steel (MS), High Strength Low Alloy Steel (HSLA), Austenitic Stainless Steel (SS), or Aluminum (AL)—Expressed in Decimals of an Inch After Forming... Steel (MS), High Strength Low Alloy Steel (HSLA), Austenitic Stainless Steel (SS), or Aluminum (AL...

  2. 49 CFR 178.348-2 - Material and thickness of material.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... Bulkheads and Baffles When Used as Tank Reinforcement) Using Mild Steel (MS), High Strength Low Alloy Steel (HSLA), Austenitic Stainless Steel (SS), or Aluminum (AL)—Expressed in Decimals of an Inch After Forming... Steel (MS), High Strength Low Alloy Steel (HSLA), Austenitic Stainless Steel (SS), or Aluminum (AL...

  3. 49 CFR 178.348-2 - Material and thickness of material.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... Bulkheads and Baffles When Used as Tank Reinforcement) Using Mild Steel (MS), High Strength Low Alloy Steel (HSLA), Austenitic Stainless Steel (SS), or Aluminum (AL)—Expressed in Decimals of an Inch After Forming... Steel (MS), High Strength Low Alloy Steel (HSLA), Austenitic Stainless Steel (SS), or Aluminum (AL...

  4. Apollo 9 Command/Service Modules photographed from Lunar Module

    NASA Technical Reports Server (NTRS)

    1969-01-01

    The Apollo 9 Command/Service Modules photographed from the Lunar Module, 'Spider', on the fifth day of the Apollo 9 earth-orbital mission. Docking mechanism is visible in nose of the Command Module, 'Gumdrop'. Object jutting out from the Service Module aft bulkhead is the high-gain S-Band antenna.

  5. 21. VIEW LOOKING FORWARD INTO STARBOARD SIDE OF CHAIN LOCKER ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    21. VIEW LOOKING FORWARD INTO STARBOARD SIDE OF CHAIN LOCKER FROM CHAIN LOCKER BULKHEAD; PAWL BITT SHOWN IN EXTREME LEFT FOREGROUND, WITH APRON IN BACKGROUND. BREASTHOOK, SHELF AND CLAMP SHOWN AT TOP OF IMAGE - Pilot Schooner "Alabama", Moored in harbor at Vineyard Haven, Vineyard Haven, Dukes County, MA

  6. 20. DETaIL VIEW OF UPPER EAST WALL CONTROL STATION, SHOWING ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    20. DETaIL VIEW OF UPPER EAST WALL CONTROL STATION, SHOWING EMERGENCY BULKHEAD STIFFLEG DERRICK, MAIN LOCK PEDESTRIAN BRIDGE, RECESSES FOR MAIN LOCK LIFT GATE, AND TILE GAUGES, LOOKING SOUTHEAST - Upper Mississippi River 9-Foot Channel Project, Lock & Dam 27, Granite City, Madison County, IL

  7. 12 CFR 1010.209 - Title and land use.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ...; and construction, dredging, bulkheading, etc. that affect bodies of water within or around the... or notation by the recorder of deeds, or similarly constituted officer, as to the recording data. (ii... which shows the proposed division of the land, the lot dimensions and their relation to proposed or...

  8. 12 CFR 1010.209 - Title and land use.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...; and construction, dredging, bulkheading, etc. that affect bodies of water within or around the... or notation by the recorder of deeds, or similarly constituted officer, as to the recording data. (ii... which shows the proposed division of the land, the lot dimensions and their relation to proposed or...

  9. 12 CFR 1010.209 - Title and land use.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...; and construction, dredging, bulkheading, etc. that affect bodies of water within or around the... or notation by the recorder of deeds, or similarly constituted officer, as to the recording data. (ii... which shows the proposed division of the land, the lot dimensions and their relation to proposed or...

  10. 46 CFR 42.25-15 - Stowage.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ..., DEPARTMENT OF HOMELAND SECURITY (CONTINUED) LOAD LINES DOMESTIC AND FOREIGN VOYAGES BY SEA Special... length which is the total length of the well or wells between superstructures. Where there is no limiting... cargoes where there is no bulkhead. (2) Lashings shall be not less than 3/4-inch close link chain or...

  11. 46 CFR 42.25-15 - Stowage.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ..., DEPARTMENT OF HOMELAND SECURITY (CONTINUED) LOAD LINES DOMESTIC AND FOREIGN VOYAGES BY SEA Special... length which is the total length of the well or wells between superstructures. Where there is no limiting... cargoes where there is no bulkhead. (2) Lashings shall be not less than 3/4-inch close link chain or...

  12. 46 CFR 42.25-15 - Stowage.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ..., DEPARTMENT OF HOMELAND SECURITY (CONTINUED) LOAD LINES DOMESTIC AND FOREIGN VOYAGES BY SEA Special... length which is the total length of the well or wells between superstructures. Where there is no limiting... cargoes where there is no bulkhead. (2) Lashings shall be not less than 3/4-inch close link chain or...

  13. 46 CFR 42.25-15 - Stowage.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ..., DEPARTMENT OF HOMELAND SECURITY (CONTINUED) LOAD LINES DOMESTIC AND FOREIGN VOYAGES BY SEA Special... length which is the total length of the well or wells between superstructures. Where there is no limiting... cargoes where there is no bulkhead. (2) Lashings shall be not less than 3/4-inch close link chain or...

  14. 46 CFR 42.25-15 - Stowage.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ..., DEPARTMENT OF HOMELAND SECURITY (CONTINUED) LOAD LINES DOMESTIC AND FOREIGN VOYAGES BY SEA Special... length which is the total length of the well or wells between superstructures. Where there is no limiting... cargoes where there is no bulkhead. (2) Lashings shall be not less than 3/4-inch close link chain or...

  15. 46 CFR 92.07-10 - Construction.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... treads, shall be of steel. (6) Except for washrooms and toilet spaces, deck coverings within... spaces, galleys, main pantries and storerooms, other than small service lockers, shall be of “A” Class... bulkheads in accommodation spaces shall be of the “A” or “B” Class intact from deck to deck. Stateroom doors...

  16. 46 CFR 92.07-10 - Construction.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... treads, shall be of steel. (6) Except for washrooms and toilet spaces, deck coverings within... spaces, galleys, main pantries and storerooms, other than small service lockers, shall be of “A” Class... bulkheads in accommodation spaces shall be of the “A” or “B” Class intact from deck to deck. Stateroom doors...

  17. 46 CFR 92.07-10 - Construction.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... treads, shall be of steel. (6) Except for washrooms and toilet spaces, deck coverings within... spaces, galleys, main pantries and storerooms, other than small service lockers, shall be of “A” Class... bulkheads in accommodation spaces shall be of the “A” or “B” Class intact from deck to deck. Stateroom doors...

  18. 46 CFR 92.07-10 - Construction.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... treads, shall be of steel. (6) Except for washrooms and toilet spaces, deck coverings within... spaces, galleys, main pantries and storerooms, other than small service lockers, shall be of “A” Class... bulkheads in accommodation spaces shall be of the “A” or “B” Class intact from deck to deck. Stateroom doors...

  19. Fuel Line Study

    DTIC Science & Technology

    1994-08-01

    prevea.ied the destruction of both an ONA DC-10 following an engine explosion and fire during takeoff at JFK Airport , and the EAL DC-9 following failure of...explosion and fire during takeoff at JFK Airport , and the EAL DC-9, following failure of the fuselage at the aft pressure bulkhead on landing at Fort

  20. Lopez-Alegria adds patch to bulkhead in Node 1 / Unity module

    NASA Image and Video Library

    2007-04-17

    ISS014-E-19541 (17 April 2007) --- Astronaut Michael E. Lopez-Alegria, Expedition 14 commander and NASA space station science officer, adds the Expedition 14 patch to the Unity node's growing collection of insignias representing crews who have lived and worked on the International Space Station.

  1. 78 FR 49978 - Airworthiness Directives; the Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-16

    ... currently requires repetitive inspections for cracking and corrosion of the aft pressure bulkhead, and... we issued AD 2002-10-11, we have received three reports of severe corrosion in the area affected by... actions if necessary. This proposed AD would also limit corrosion and cracking repairs of the aft pressure...

  2. Commander Young removes CAP from FDF stowage locker on middeck

    NASA Technical Reports Server (NTRS)

    1981-01-01

    Commander Young removes Crew Activity Plans (CAP) from Flight Data File (FD/FDF) modular stowage locker single tray assembly located in forward middeck locker MF28E. Window shade and filter kit on port side bulkhead and potable water tank on middeck floor appear in view. Photo was taken by Pilot Crippen with a 35mm camera.

  3. 78 FR 77618 - Airworthiness Directives; M7 Aerospace LLC Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-24

    ...-1057; Directorate Identifier 2013-CE-041-AD] RIN 2120-AA64 Airworthiness Directives; M7 Aerospace LLC...). SUMMARY: We propose to adopt a new airworthiness directive (AD) for all M7 Aerospace LLC Models SA226-AT... bulkhead. This proposed AD also requires reporting certain inspection results to M7 Aerospace LLC. We are...

  4. 46 CFR 76.30-10 - Location and spacing of tubing.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 3 2010-10-01 2010-10-01 false Location and spacing of tubing. 76.30-10 Section 76.30... PROTECTION EQUIPMENT Pneumatic Fire Detecting System, Details § 76.30-10 Location and spacing of tubing. (a) The tubing shall be located on the overhead or within 12 inches of the overhead on the bulkheads...

  5. 17. VIEW FORWARD FROM THE CAPTAIN'S CABIN INTO THE ENGINE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    17. VIEW FORWARD FROM THE CAPTAIN'S CABIN INTO THE ENGINE ROOM. THE OPENING IN THE BULKHEAD WAS CUT TO AID ENGINE REMOVAL. DECK BEAMS WERE ALSO CUT AWAY TO REMOVE ENGINE. PIPE IN FOREGROUND AT RIGHT IS ATTACHED TO A BOILER. - Auxiliary Fishing Schooner "Evelina M. Goulart", Essex Shipbuilding Museum, 66 Main Street, Essex, Essex County, MA

  6. 76 FR 17332 - Special Conditions: Embraer S.A.; Model EMB 500; Single-Place Side-Facing Seat Dynamic Test...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-29

    ... locked open during taxi, takeoff and landing. The adjacent forward wall/bulkhead interior structure will... inches of energy absorbing protective padding (foam or equivalent), such as Ensolite. 3. Thoracic Trauma... occupied, the lavatory door must be latched open for takeoff and landing and must remain latched under the...

  7. 46 CFR 39.40-5 - Operational requirements for vapor balancing-TB/ALL.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... tanks have partial bulkheads, the oxygen content of each area of that tank formed by each partial... vapor collection system must be tested prior to cargo transfer to ensure that the oxygen content in the vapor space does not exceed 8 percent by volume. The oxygen content of each tank must be measured at a...

  8. Saturn S-2 production operations techniques: Production welding. Volume 1: Bulkhead welding

    NASA Technical Reports Server (NTRS)

    Abel, O. G.

    1970-01-01

    The complex Saturn S-2 welding processes and procedures required considerable development and refinement to establish a production capability that could consistently produce aluminum alloy welds within specified requirements. The special processes and techniques are defined that were established for the welding of gore-to-gore and manhole- or closeout-to-gore.

  9. 46 CFR 164.008-5 - Test report.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 6 2011-10-01 2011-10-01 false Test report. 164.008-5 Section 164.008-5 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) EQUIPMENT, CONSTRUCTION, AND MATERIALS: SPECIFICATIONS AND APPROVAL MATERIALS Bulkhead Panels § 164.008-5 Test report. (a) The test report required by § 164.008-7 (e) and (g) shall include at least...

  10. Effective vacua for Floquet topological phases: A numerical perspective on the switch-function formalism

    NASA Astrophysics Data System (ADS)

    Tauber, C.

    2018-05-01

    We propose a general edge index definition for two-dimensional Floquet topological phases based on a switch-function formalism. When the Floquet operator has a spectral gap, the index covers both clean and disordered phases, anomalous or not, and does not require the bulk to be fully localized. It is interpreted as a nonadiabatic charge pumping that is quantized when the sample is placed next to an effective vacuum. This vacuum is gap-dependent and obtained from a Floquet Hamiltonian. The choice of a vacuum provides a simple and alternative gap-selection mechanism. Inspired by the model from Rudner et al. we then illustrate these concepts on Floquet disordered phases. Switch-function formalism is usually restricted to infinite samples in the thermodynamic limit. Here we circumvent this issue and propose a numerical implementation of the edge index that could be adapted to any bulk or edge index expressed in terms of switch functions, already existing for many topological phases.

  11. Ultralight Fabric Reflux Tube (UFRT) Thermal/Vacuum Test

    NASA Technical Reports Server (NTRS)

    Hurlbert, K. M.; Ewert, M. K.; Graf, J. P.; Keller, J. R.; Pauley, K. A.; Guenther, R. J.; Antoniak, Z. I.

    1996-01-01

    Spacecraft thermal control systems are essential to provide the necessary environment for the crew and equipment to function adequately on space missions. The Ultralight Fabric Reflux Tube (UFRT) was developed by Pacific Northwest Laboratory (PNL) as a lightweight radiator concept to be used on planetary-type missions (e.g., Moon, Mars). The UFRT consists of a thin-walled tube (acting as the fluid boundary), overwrapped with a low-mass ceramic fabric (acting as the primary pressure boundary). The tubes are placed in an array in the vertical position with the evaporators at the lower end. Heat is added to the evaporators, which vaporizes the working fluid. The vapor travels to the condenser end above and cools as heat is radiated to the environment. The fluid condensed on the tube wall is then returned to the evaporator by gravity. The primary objectives for the fiscal year 1994 program included the design and fabrication of prototype UFRTs and thermal/vacuum chamber testing of these test articles. Six UFRTS, with improved titanium liners, were successfully manufactured and provided to the Johnson Space Center in July 1994. Five were tested in a thermal/vacuum chamber in September 1994. Data obtained to characterize the performance of the UFRTs under simulated lunar conditions demonstrated the design concept successfully. In addition, a trade study showed that an optimized/improved UFRT could achieve as much as a 25% mass savings in the heat rejection subsystem of future planetary-type thermal control systems.

  12. Detail of wharf A timber framing, showing piers and pier ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Detail of wharf A timber framing, showing piers and pier caps or plates stepping down for a sloped launching deck, now built-up for a flat deck, interior of sheet steel bulkhead is visible at wharf edge - U.S. Coast Guard Sandy Hook Station, Western Docking Structure, West of intersection of Canfield Road & Hartshorne Drive, Highlands, Monmouth County, NJ

  13. KSC-02pd1716

    NASA Image and Video Library

    2002-11-14

    KENNEDY SPACE CENTER, FLA. -- Workers on Launch Pad 39A perform checks on Endeavour's oxygen flex hose fitting through manual inspection and using helium detectors. Visual inspection found a deformity in the flex line braid where it connects to rigid tubing. The entire flex hose assembly and bulkhead fitting were removed early today, and work is under way to complete the installation of a replacement.

  14. Photon-photon scattering at the high-intensity frontier

    NASA Astrophysics Data System (ADS)

    Gies, Holger; Karbstein, Felix; Kohlfürst, Christian; Seegert, Nico

    2018-04-01

    The tremendous progress in high-intensity laser technology and the establishment of dedicated high-field laboratories in recent years have paved the way towards a first observation of quantum vacuum nonlinearities at the high-intensity frontier. We advocate a particularly prospective scenario, where three synchronized high-intensity laser pulses are brought into collision, giving rise to signal photons, whose frequency and propagation direction differ from the driving laser pulses, thus providing various means to achieve an excellent signal to background separation. Based on the theoretical concept of vacuum emission, we employ an efficient numerical algorithm which allows us to model the collision of focused high-intensity laser pulses in unprecedented detail. We provide accurate predictions for the numbers of signal photons accessible in experiment. Our study is the first to predict the precise angular spread of the signal photons, and paves the way for a first verification of quantum vacuum nonlinearity in a well-controlled laboratory experiment at one of the many high-intensity laser facilities currently coming online.

  15. 75 FR 5695 - Airworthiness Directives; PIAGGIO AERO INDUSTRIES S.p.A Model PIAGGIO P-180 Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-02-04

    ... airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an... confirm the low stress level in that area, a reinforcement of the ``0'' pressure bulkhead is suggested to... aircraft from MSN 1106 up to 1189 could have the same cracks. Although calculations confirm the low stress...

  16. 46 CFR 171.065 - Subdivision requirements- Type I.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... the following: (i) 0.6LN (0.056LN) where— N=the total number of passengers; and L=LBP in feet (meters... bulkhead deck. EC01MR91.021 Table 171.065(a) (English units) Vessel length (LBP) Criterion numeral (CN) FS CN less than or equal to 23 A Vessel length greater than 392 feet CN greater than 23 and less than...

  17. Effects of erosion control structures along a portion of the northern Chesapeake Bay shoreline

    USGS Publications Warehouse

    Zabawa, C.F.; Kerhin, R.T.; Bayley, S.

    1981-01-01

    A 6.500-meter reach of western Chesapeake Bay shoreline (lower Mayo Peninsula) lost about 1.1??106 cubic meters of sediment (equivalent to 170 cubic meters lost per meter of shoreline) between 1846 and 1932, when the first aerial photographs show the shoreline already substantially protected by a system of groins and intermittent bulkheading. These structures have eliminated the fastland as a source of erodable material, and have starved the supply of sand for littoral drift, thus limiting the extent of the beaches to the remaining groin fields. Volumes of sediment involved in these impacts are small in the overall sediment budget. Bulkheads produce no deficit in the budget since scouring of the beaches on their seaward sides makes up for the decreased erosion of protected fastland. Groins trap little of the potential littoral drift (computed to be about 104 cubic meters per meter of shoreline per year). The sand supply in the remaining beaches is nearly equivalent to the annual loss of sediment from the entire shoreline system due to the long-term rate of erosion of the shoreline and nearshore between 1846 and 1932. ?? 1981 Springer-Verlag New York Inc.

  18. Realization of MEMS-IC Vertical Integration Utilizing Smart Bumpless Bonding

    NASA Astrophysics Data System (ADS)

    Shiozaki, Masayoshi; Moriguchi, Makoto; Sasaki, Sho; Oba, Masatoshi

    This paper reports fundamental technologies, properties, and new experimental results of SBB (Smart Bumpless Bonding) to realize MEMS-IC vertical integration. Although conventional bonding technologies have had difficulties integrating MEMS and its processing circuit because of their rough bonding surfaces, fragile structures, and thermal restriction, SBB technology realized the vertical integration without thermal treatment, any adhesive materials including bumps, and chemical mechanical polishing. The SBB technology bonds sealing parts for vacuum sealing and electrodes for electrical connection simultaneously as published in previous experimental study. The plasma CVD SiO2 is utilized to realize vacuum sealing as sealing material. And Au projection studs are formed on each electrode and connected electrically between two wafers by compressive plastic deformation and surface activation. In this paper, new experimental results including vacuum sealing properties, electrical improvement, IC bonding results on the described fundamental concept and properties are reported.

  19. Design, fabrication and acceptance testing of a zero gravity whole body shower, volume 1

    NASA Technical Reports Server (NTRS)

    1973-01-01

    The effort to design whole body shower for the space station prototype is reported. Clothes and dish washer/dryer concepts were formulated with consideration given to integrating such a system with the overall shower design. Water recycling methods to effect vehicle weight savings were investigated and it was concluded that reusing wash and/or rinse water resulted in weight savings which were not sufficient to outweigh the added degree of hardware complexity. The formulation of preliminary and final designs for the shower are described. A detailed comparison of the air drag vs. vacuum pickup method was prepared that indicated the air drag concept results in more severe space station weight penalties; therefore, the preliminary system design was based on utilizing the vacuum pickup method. Tests were performed to determine the optimum methods of storing, heating and sterilizing the cleansing agent utilized in the shower; it was concluded that individual packages of pre-sterilized cleansing agent should be used. Integration features with the space station prototype system were defined and incorporated into the shower design as necessary.

  20. 49 CFR 178.346-2 - Material and thickness of material.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... Bulkheads and Baffles When Used as Tank Reinforcement) Using Mild Steel (MS), High Strength Low Alloy Steel (HSLA), Austenitic Stainless Steel (SS), or Aluminum (AL)—Expressed in Decimals of an Inch After Forming... Thickness of Shell Using Mild Steel (MS), High Strength Low Alloy Steel (HSLA), Austenitic Stainless Steel...

  1. 46 CFR 171.100 - Shaft tunnels and stern tubes.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Shaft tunnels and stern tubes. 171.100 Section 171.100... PERTAINING TO VESSELS CARRYING PASSENGERS Additional Subdivision Requirements § 171.100 Shaft tunnels and... passengers on an international voyage. (b) The watertight seal in the bulkhead between the stern tube space...

  2. 78 FR 55662 - Airworthiness Directives; the Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-09-11

    ...-10, DC-9-30, and DC-9-40 series airplanes. This proposed AD was prompted by an evaluation by the design approval holder (DAH) indicating that the aft pressure bulkhead web area is subject to widespread... conditions and design attributes, or because of isolated situations or incidents such as material defects...

  3. 46 CFR 179.240 - Foam flotation material.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... accommodate the buoyancy of the foam; (5) Piping and cables must not pass through foamed spaces unless they... submerged to its bulkhead deck; (8) The effective buoyancy of the foam must be determined at the end of the submergence test required by paragraph (b)(7) of this section. The effective buoyancy or 881 kilograms per...

  4. 46 CFR 179.240 - Foam flotation material.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... accommodate the buoyancy of the foam; (5) Piping and cables must not pass through foamed spaces unless they... submerged to its bulkhead deck; (8) The effective buoyancy of the foam must be determined at the end of the submergence test required by paragraph (b)(7) of this section. The effective buoyancy or 881 kilograms per...

  5. 46 CFR 179.240 - Foam flotation material.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... accommodate the buoyancy of the foam; (5) Piping and cables must not pass through foamed spaces unless they... submerged to its bulkhead deck; (8) The effective buoyancy of the foam must be determined at the end of the submergence test required by paragraph (b)(7) of this section. The effective buoyancy or 881 kilograms per...

  6. 161. GENERAL VIEW OF BASE. VIEW SOUTH FROM DOG PATCH ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    161. GENERAL VIEW OF BASE. VIEW SOUTH FROM DOG PATCH BEACH SHOWING, FROM LEFT TO RIGHT, THE AIRFIELD, BULKHEAD, BUILDING 64, 61, 3,4,5,6, STRUCTURE 68 (WATER TOWER), BUILDING 11 AND STRUCTURE 67 (WATER TOWER). - Quonset Point Naval Air Station, Roger Williams Way, North Kingstown, Washington County, RI

  7. 77 FR 70355 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-11-26

    ... leakage zone) or heat damage to the APU power feeder cable, insulation blankets, or pressure bulkhead...) of the NPRM requires repair of the APU power feeder, insulation blankets, and clamps, if no primer... bulletin, which states, ``If visual indications of heat damage are found, do steps 6.c through 6.f...

  8. THE MAJOR COASTAL COMMUNITIES OF NORTH CAROLINA.

    ERIC Educational Resources Information Center

    Marine Science Project, Beaufort, NC.

    IDENTIFIED IN THIS MARINE SCIENCE HANDBOOK ARE 5 MAJOR TYPES OF NATURAL HABITATS--(1) OPEN BEACH AND ANY OTHER SEAWARD-FACING, UNPROTECTED STRAND, (2) GROINS, JETTIES, PILINGS, AND ROCK BULKHEADS, (3) SAND AND/OR MUD FLAT, (4) SALT MARSH, AND (5) UPLAND COMMUNITIES. EACH HABITAT IS DESCRIBED IN TERMS OF TYPICAL PLANTS AND ANIMALS, ADAPTATIONS, AND…

  9. 78 FR 1772 - Airworthiness Directives; The Boeing Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-01-09

    ...'' chord of the bulkhead, inspection cycle. the web located under the outer circumferential tear strap, the..., 2011. (m) Retained One-Time Inspection Under the Tear Strap This paragraph restates the one-time inspection under the tear strap required by paragraph (m) of AD 2012-18-13, Amendment 39-17190 (77 FR 57990...

  10. 46 CFR 32.56-55 - Control spaces-T/ALL.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 1 2014-10-01 2014-10-01 false Control spaces-T/ALL. 32.56-55 Section 32.56-55 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY TANK VESSELS SPECIAL EQUIPMENT, MACHINERY, AND HULL....56-55 Control spaces—T/ALL. Bulkheads and decks that separate control spaces from adjacent spaces...

  11. 46 CFR 32.56-55 - Control spaces-T/ALL.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 1 2013-10-01 2013-10-01 false Control spaces-T/ALL. 32.56-55 Section 32.56-55 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY TANK VESSELS SPECIAL EQUIPMENT, MACHINERY, AND HULL....56-55 Control spaces—T/ALL. Bulkheads and decks that separate control spaces from adjacent spaces...

  12. 46 CFR 32.56-55 - Control spaces-T/ALL.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 1 2010-10-01 2010-10-01 false Control spaces-T/ALL. 32.56-55 Section 32.56-55 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY TANK VESSELS SPECIAL EQUIPMENT, MACHINERY, AND HULL....56-55 Control spaces—T/ALL. Bulkheads and decks that separate control spaces from adjacent spaces...

  13. 46 CFR 32.56-55 - Control spaces-T/ALL.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 1 2011-10-01 2011-10-01 false Control spaces-T/ALL. 32.56-55 Section 32.56-55 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY TANK VESSELS SPECIAL EQUIPMENT, MACHINERY, AND HULL....56-55 Control spaces—T/ALL. Bulkheads and decks that separate control spaces from adjacent spaces...

  14. 46 CFR 32.56-55 - Control spaces-T/ALL.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 1 2012-10-01 2012-10-01 false Control spaces-T/ALL. 32.56-55 Section 32.56-55 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY TANK VESSELS SPECIAL EQUIPMENT, MACHINERY, AND HULL....56-55 Control spaces—T/ALL. Bulkheads and decks that separate control spaces from adjacent spaces...

  15. Design criteria monograph for metal tanks and tank components

    NASA Technical Reports Server (NTRS)

    1975-01-01

    Significant elements in detail tank design are wall and end structures, weld joints at bulkhead and attachment junctures, and ports and access openings. Additional design considerations are influence and effect of fabrication processes on tank component design, and finally, testing and inspection that are required to establish confidence in tank design.

  16. 46 CFR 118.115 - Applicability to existing vessels.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... boundary bulkhead or deck, composed of wood or fiber reinforced plastic, or sheathed on the interior in fiber reinforced plastic, must comply with the requirements of § 118.400 of this part on or before March... completed to the satisfaction of the cognizant Officer in Charge, Marine Inspection (OCMI) on or after March...

  17. 46 CFR 118.115 - Applicability to existing vessels.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... boundary bulkhead or deck, composed of wood or fiber reinforced plastic, or sheathed on the interior in fiber reinforced plastic, must comply with the requirements of § 118.400 of this part on or before March... completed to the satisfaction of the cognizant Officer in Charge, Marine Inspection (OCMI) on or after March...

  18. 6. VIEW, LOOKING EAST, TOWARD STERN ALONG PORT SIDE, IRON ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    6. VIEW, LOOKING EAST, TOWARD STERN ALONG PORT SIDE, IRON STOVE CAGE IN CENTER, SMALL DOOR IN STERN BULKHEAD AT RIGHT REAR THAT LEADS TO LIVING QUARTERS AND STERN DECK Edward Larrabee, photographer, December 1984 - Shooters Island, Ships Graveyard, Vessel No. 37, Newark Bay, Staten Island (subdivision), Richmond County, NY

  19. 46 CFR 32.57-5 - Definitions-TB/ALL.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... decks, means divisions that are composed of steel or an equivalent metal, suitably stiffened, and made intact with the main structure of the vessel, including the shell, structural bulkheads, or decks. They... relative to the passage of flame. (e) Steel. Where the term “steel or other equivalent metal” is used in...

  20. 46 CFR 32.57-5 - Definitions-TB/ALL.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... decks, means divisions that are composed of steel or an equivalent metal, suitably stiffened, and made intact with the main structure of the vessel, including the shell, structural bulkheads, or decks. They... relative to the passage of flame. (e) Steel. Where the term “steel or other equivalent metal” is used in...

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