In March 2002, a 25-ft/s vertical drop test of a composite fuselage section was conducted onto water. The purpose of the test was to obtain experimental data characterizing the structural response of the fuselage section during water impact for comparison...
National Technical Information Service (NTIS)
A 25-ft/s vertical drop test of a composite fuselage section was conducted with two energy-absorbing seats occupied by anthropomorphic dummies to evaluate the crashworthy features of the fuselage section and to determine its interaction with the seats and...
SPACE SHUTTLE: OPEATIONS IN NEAR-EARTH ORBIT ... Tiles covering the upper and forward fuselage sections and the tops of wings can absorb heat as ...
NASA Website
A 25-ft/s vertical drop test of a composite fuselage section was conducted with two energy-absorbing seats occupied by anthropomorphic dummies to evaluate the crashworthy features of the fuselage section and to determine its interaction with the seats and dummies. The 5-ft. diameter ...
E-print Network
A preliminary study of structural concepts for noncircular fuselage configurations is presented. For an unconventional flying-wing type aircraft, in which the fuselage is inside the wing, multiple fuselage bays with non-circular sections need to be consid...
... 2009-01-01 false Fuselage and rotor pylon structures. 29.549 Section 29...Requirements § 29.549 Fuselage and rotor pylon structures. (a) Each fuselage and rotor pylon structure must be designed to...
Code of Federal Regulations, 2010
...false Fuselage, landing gear, and rotor pylon structures. 27.549 Section...549 Fuselage, landing gear, and rotor pylon structures. (a) Each fuselage, landing gear, and rotor pylon structure must be designed as...
A 30-ft/s vertical drop test of a fuselage section of a Boeing 737 aircraft was conducted in October
NASA Technical Reports Server (NTRS)
Category 18 Spacecraft Design, Testing and Performance . ...... Ergonomics Society 46th Annual Meeting, September 30October 4, 2002, Baltimore, ..... Composite Fuselage Section With Energy-Absorbing Seats and Dummies. ...... Malekpour, M. R.; and Torres, W.: A Conceptual Design of a Reliable Optical. Bus (ROBUS). ...
... 9 Page 13. Different stress curves are shown for each fuselage configuration as compared to the baseline circular configuration. 10 Page 14. 11 ...
DTIC Science & Technology
A Boeing 707 fuselage section was drop tested at the NASA Langley Research Center to measure structural, seat, and occupant response to vertical crack loads. Post-test inspection showed that the section bottom collapsed inward approximately 2 ft. Prelimin...
From 1991 to 2000, the Federal Aviation Administration (FAA) conducted vertical and longitudinal and static and dynamic tests of various narrow-body transport airplane fuselage sections, which included different types of in-service overhead stowage bins. ...
... Subject Categories : CONTAINERS AND PACKAGING LOGISTICS, MILITARY FACILITIES AND SUPPLIES FUELS. Distribution ...
... Store Separation Characteristics Including Fuselage and Stores of Noncircular Cross Section. Volume II. Users Manual for the Computer Program. ...
... of Supersonic Store Separation Characteristics Including Fuselage and Stores of Noncircular Cross Section, Volume IV. Appendices C and D ...
... tion. The chord on each wing was aligned with the flow direction thus allowing support of the wings on the same fuselage center section. ...
A 10-foot-long fuselage section from a Boeing 737-100 was dropped from a height of 14 feet, generating a final velocity at impact of 30 feet per second. The fuselage section was configured to simulate the load density at the maximum takeoff weight conditi...
The previous design philosophies involving safe life, fail-safe and damage tolerance concepts become inadequate for assuring the safety of aging aircraft structures. For example, the failure mechanism for the Aloha Airline accident involved the coalescence of undetected small cracks at the rivet holes causing a section of the fuselage to peel open during ...
NASA Astrophysics Data System (ADS)
The patent concerns a recoverable remotely piloted vehicle (RPV) having: a deflectable canard/elevator placed very close to the nose tip; a constant (cross) section fuselage; wings mounted low and well aft on the fuselage; elevons; a centrally positioned ...
... Repairs assessment for pressurized fuselages. 129.107 Section 129.107 Aeronautics and Space FEDERAL AVIATION...Continued Airworthiness and Safety Improvements § 129.107 Repairs assessment for pressurized...
... Repairs assessment for pressurized fuselages. 125.505 Section 125.505 Aeronautics and Space FEDERAL AVIATION...Continued Airworthiness and Safety Improvements § 125.505 Repairs assessment for pressurized...
... into two sections, fuselage centerline- mounted configurations and wing pylon-mounted configurations. The tech- nique presented in this section ...
A method for computing the energy release rate for cracks of varying length in a typical stiffened metallic fuselage under general loading conditions is presented. Reliable analytical methods that predict the structural integrity and residual strength of aircraft fuselage structures containing cracks are needed to help to understand the behavior of ...
... Accession Number : ADD528316. Title : Wing-Body Interference Lift for Supersonic Missile with Elliptical Cross-Section Fuselages. ...
... 10.1.2 Three attacks against forward and rear bomb bay sections, and a ... of the target exhibited a marked degree of petalling (Pig.28o) particularly ...
Sep 13, 2010 ... At the rear of the fuselage of most aircraft one finds a vertical stabilizer and a rudder. The stabilizer is a fixed wing section whose job ...
The use of the F-18B aircraft is considered acceptable for this work because the outer mold line only differs at the canopy section of the fuselage, ...
The following conclusions are drawn from the teWa on the McDonnell airplane.. Difference in engine, fuselage shape, and wing section and location might ...
Surface heating rates and surface temperatures for a space shuttle re- entry profile were calculated for two wing cross sections and one fuselage ...
... Store Separation Characteristics Including Fuselage and Stores of Noncircular Cross Section. Volume III. Appendices A and B, Details of Program I. ...
Efforts focused on the use of thermoplastic composite materials in the development of structural details associated with an advanced fighter fuselage section with applicability to transport design. In support of these designs, mechanics developments were ...
... A second drop test of a similar B737 fuselage section was conducted in November of 2000 in which two different overhead stowage bins were ...
Apr 7, 2002 ... In diffusion bonding, titanium strips are bonded together under heat, ... In looking at the cross section of a diffusion bond, one sees no weld line. ...
excitation, or installing vibration absorbers or isolators in the rotor or fuselage. Unfortunately, these .... structural dynamic characteristics of the rotor blades. ... was lower than predicted by thin airfoil theory, largely ...
The dihedral reflector with wing and fuselage joint is a very strong electomagnetic scattering source in a wide angular region. The prediction of the electromagnetic scattering and radar cross section from this construction, however, is a complicated theoretical problem, because one of the dihedral surfaces is curved. In this paper, the problem is analyzed ...
A coupled rotor-fuselage vibration analysis for helicopter rotor system fault detection is developed. The coupled rotor/fuselage/vibration absorbers (bifilar type) system incorporates consistent structural, aerodynamic and inertial couplings. The aeroelastic analysis is based on finite element methods in space and time. The coupled ...
... OF 30 COMBINATIONS WITH TRIANGULAR AND ELLIPTICAL FUSELAGES IN THE NACA ... ELLIPTICAL FUSELAGES IN THE NACA ...
Reliable analytical methods that predict the structural integrity and residual strength of aircraft fuselage structures containing cracks are needed to help to understand the behavior of pressurized stiffened shells with damage, so that it becomes possible to determine the safe life of such a shell. Of special importance is the ability to determine under what conditions local ...
The feasibility of helicopter blade lag damping using embedded chordwise absorbers is investigated. The basic feature of this approach is the use of tuned vibration absorbers along the blades. This concept, utilizing a portion of the leading edge weights that are already incorporated into the blade as a part of the mass of the ...
The Structures and Materials Research Center of the National Aerospace Laboratory of Japan (NAL) and Kawasaki Heavy Industries, Ltd. (KHI) conducted the 2nd vertical drop test of a fuselage section cut from a NAMC YS-11 transport airplane in July 2002. The main objective of this test program was to obtain background data for aircraft cabin safety by drop ...
To perform acoustic studies for achieving low noise levels for the Dornier 328, an acoustic test cell (ATC) of the Dornier 328 has been built. The ATC consists of a fuselage section, a realistic fuselage suspension system, and three exterior noise simulat...
Characteristics and damage associated with exploded luggage aboard aircraft are presented in this paper. Plastic-sided suitcases filled with typical travel possessions were exploded inside the fuselage of decomissioned B-52 aircraft. Multilayered shield panels, mounted to one side of the fuselage, served to protect the aircraft body and flight system ...
Energy Citations Database
Over the years there has been a need to improve the comfort of passengers in flight. One avenue for increasing comfort is to reduce cabin noise that is attributed to the engine and the vibration of fuselage panels that radiate sound. High frequency noise can be abated using sound absorbing material. Though, for low frequency noise the sound absorption ...
A cylindrical or trough-like radiant energy concentration and collection device is provided. The device includes an energy absorber, a glazing enveloping the absorber and a reflective wall. The ideal contour of the reflective wall is determined with reference to a virtual absorber and not the actual absorber cross ...
DOEpatents
... BG = Background Absorbance; AA = Atomic Absorbance. ... BG = Background Absorbance; AA = Atomic Absorbance. 3.6 Figure 3. Irregular Peak Profiles. ...
Center for Food Safety and Applied Nutrition (CFSAN)
...2011-04-01 2011-04-01 false Carbon dioxide absorbent. 868.5300 Section...DEVICES Therapeutic Devices § 868.5300 Carbon dioxide absorbent. (a) Identification. A carbon dioxide absorbent is a device...
Code of Federal Regulations, 2011
Currently, some kinds of helicopters use pendulum absorbers in order to reduce vibrations. Present pendulum absorbers are designed based on the antiresonance concept used in the linear theory. However, since the vibration amplitudes of the pendulum are not small, it is considered that the nonlinearity has influence on the vibration characteristics. ...
The finite and boundary element modeling of the curved section of a composite honeycomb aircraft fuselage sidewall was validated for both structural response and acoustic radiation. The curved panel was modeled in the pre-processor MSC/PATRAN. Geometry mo...
A manufacturing technology for the spot weld-dhesive bonding process, describedas weldbonding, was developed. A fuselage barrel section, 85 inches in diameterby 120 inches in length, was designed and built to simulate structures common tothe Lockheed C- ,...
Replica fuel tank bladders, parts of fuel tanks that were built as replicas of the tanks of potential air targets, were designed, manufactured and installed in existing replica fuselage sections. Two bladder geometric configurations were required for each...
anular wing of aspect ratio 2 with an NACA 0005-63 airfoil section and a. 11 56 swept horizontal tail. The flight tests of the same fuselage-tail com- ...
Simulation of multi-terrain impact has been identified as an important research area for improved prediction of rotorcraft crashworthiness within the NASA Subsonic Rotary Wing Aeronautics Program on Rotorcraft Crashworthiness. As part of this effort, two ...
An unconventional advanced air-to-surface weapon of monowing configuration, and having a symmetrical, high lift fuselage of lenticular (i.e., biconvex or oblate) cross section, with a width-to-thickness fineness of approximately 2.5. The longitudinal prof...
...landing gear, and rotor pylon structure must be designed as prescribed in this section. Resultant rotor forces may be represented as a single force applied at the rotor hub attachment point. (b) Each structure must be designed to withstand�...
14 Aeronautics and Space 1 2011-01-01 2011-01-01...783 Section 25.783 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT...result of mechanical failure or blocking debris, the door need not close and latch...
LS-DYNA? 1 soil impact model development and test-analysis correlation results are presented for: (1) a 38-ft/s vertical drop test of a composite fuselage section ...
Interior Design of the Eagle RTS. Cross-sectional. View of the Fuselage. Mission ...... AIAA Education. Series,. 1989. pgs 67-76, pgs 362-366, pgs 498-503 ...
A method of manufacturing a unitary seamless section of an aircraft fuselage comprises disposing a thin lay-up mandrel element onto the outer shell surface of a cylindrical inner mandrel shell, thereby forming a mandrel with a lay-up surface. A plurality of resin impregnated stiffener fibers may be layed-up within a plurality of stiffener channels in the ...
US Patent & Trademark Office Database
There is provided a solar collector comprising a heat pipe having an evaporator section and a condenser section, together with an absorber plate thermally conductively connected to the evaporator section, one side of the absorber plate being provided with a layer for the selective absorption of ...
... This thesis is a preliminary investigation of aircraft fuselage dents using the ... impact dent on fuselage panel at various locations and impact speeds. ...
... N (V) AXIAL CRACK PROPAGATION AND ARREST IN PRESSURIZED FUSELAGE ... Axial Crack Propagation And Arrest In Pressurized Fuselage ...
A two-bladed, 7.5-ft diameter dynamic rotor model with 10% chord on-blade elevons driven by piezoceramic ... vibration absorbers or isolators in the rotor or fuselage. ..... than would be anticipated based on thin airfoil theory. ...
This report summarizes the equations for exchange of linear momentum between photons and an absorbing and scattering medium. Mechanisms are not discussed, but are represented by given cross sections. Momentum exchange at discrete points, and continuously ...
... for the calculation of Mie cross sections for absorbing particles is discussed. ... 2) the maximum value of Q(ext) at the first resonance decreases rapidly ...
A uniform approach to construct absorbing artificial boundary conditions for ..... In this section, we will recreate the artificial boundary conditions for ...
An energy-absorbing countermass for a shoulder-launched rocket weapon is provided. The energy-absorbing countermass is to be placed behind a rocket round in the launch tube. The device has a center cylindrical section formed using a crushable aluminum hon...
Structural integrity assessment of aging flight vehicles is extremely important to ensure their economic and safe operation. A two-step analytical approach, developed to estimate the residual strength of pressurized fuselage stiffened shell panels with multi-bay fatigue cracking is presented in this article. Conventional finite element analysis of the damaged multibay panel is ...
The results of a numerical study to assess the effect of skin buckling on the internal load distribution in a stiffened fuselage panel, with and without longitudinal cracks, are presented. In addition, the impact of changes in the internal loads on the fatigue life and residual strength of a fuselage panel is assessed. A generic narrow -body ...
An absorber waveguide assembly for absorbing higher order modes of microwave energy under cryogenic ultra-high vacuum conditions, that absorbs wide-band multi-mode energy. The absorber is of a special triangular shape, made from flat tiles of silicon carbide and aluminum nitride. The leading sharp end of the ...
An absorber wave guide assembly for absorbing higher order modes of microwave energy under cryogenic ultra-high vacuum conditions, that absorbs wide-band multi-mode energy. The absorber is of a special triangular shape, made from flat tiles of silicon carbide and aluminum nitride. The leading sharp end of the ...
Thermal surface absorbers convert all incident radiation to heat at a single local temperature. The fluid flows perpendicular to the radiation`s propagation direction. In contrast, in volumetric absorbers the fluid flows parallel to the radiation`s propagation direction, and the absorber may exhibit temperature stratification along the ...
... A two-section bladder was fabricated to facilitate installation of the absorbent bags and the use of a minimum diameter plastic rupture disc. ...
... study. The annular space of each section was pumped full or partially full of cellular, vermiculite, or polystyrene concrete. ...
An activator has a base on which is mounted an elastically deformable micromechanical element that has a section that is free to be displaced toward the base. An absorber of radioactively emitted particles is formed on the base or the displaceable section of the deformable element and a source is formed on the other of the displaceable ...
The control rod fuel elements consist of 16 flat composite fuel plates joined to a pair of side plates to form an integral assembly with a nominal water gap spacing of 0.133 inches between fueL plates. The core section of the fuel plate contains an active fuel section and a flux suppressor section. The fuel ...
We review the status of the hypothesis that all long distance contributions to the Drell-Yan cross section can be absorbed into parton distribution functions.
DOE Information Bridge
... cross-section, the excited state cross-section, the intersystem crossing quantum yield, and ... techniques that include UV-visible, fluorescence and ...
A 25-fps vertical drop test of a 1/5-scale model composite fuselage section was conducted to replicate a previous test of a full-scale fuselage section. The purpose of the test was to obtain experimental data characterizing the impact response of the 1/5-scale model fuselage ...
The structural response of a fuselage side of the civil aircraft SAAB 340A was investigated as a part of the certification program for the aircraft. The purpose was according to the test report to verify the stability of the fuselage frames and the window...
... Title : Interference of Wing and Fuselage From Tests of 30 Combinations with Triangular and Elliptical Fuselages in the NACA Variable-Density ...
Integrally Stiffened Metallic Fuselage Structure. Integrally stiffened curved fuselage panel machined from aluminum alloy 7050 plate ...
Vertical Tail Consists of a structural fin surface, the rudder/ speed brake surface, ... The rudder splits into two halves to serve as a speed brake. ...
The differential equation is derived that describes the reflector of an ideal two-dimensional radiation concentrator with an absorber of arbitrary convex shape. For the special case of an absorber with circular cross section, the equation can be solved in closed form if suitable coordinates are used. The effect of absorption at the ...
PubMed
of the dynamics of the vibration absorber in Section 2, an unconstrained minimax optimization problem.A.C. Viana, G.I. Kotinda, D.A. Rade, V. Steffen Jr., Tuning dynamic vibration absorbers by using ant colonyMinimax design of vibration absorbers for linear damped systems Brandon Brown, Tarunraj Singh �
...2011-04-01 2011-04-01 false Carbon dioxide absorber. 868.5310 Section...DEVICES Therapeutic Devices § 868.5310 Carbon dioxide absorber. (a) Identification. A carbon dioxide absorber is a device that is...
A new dynamic vibration absorber combining a translational-type absorber and a rotational-type absorber is proposed for isolation of beam vibration under point or distributed harmonic excitation. Finite element analysis and Euler Bernouli beam theory are used for evaluation of the performance of vibration isolation of the proposed ...
Page 1. Page 2. Page 3. Page 4. Page 5. Page 6. Page 7. Page 8. Page 9. Page 10. Page 11. Page 12. Page 13. Page 14. Page 15. Page 16. Page ...
A simple technique is presented which forms a cubic grid model of a helicopter from an Aircraft Modeling Code (AMC) input file. The AMC input file defines the helicopter fuselage as a series of polygonal cross sections. The cubic grid model is used as an input to a Finite Difference Time Domain (FDTD) code to obtain predictions of antenna performance on a ...
Diffusion bonding of liminated titanium structural shapes was demonstrated. Initially, bonding parameters and procedures were identified for 6Al-6V-2Sn titanium alloy and applied to the fabrication of five full-scale F-104 fuselage ring fitting shapes wei...
oot chord of wing C ST structural tip chord of wing C T tip chord of wing d frame spacing d W optimum web spacing of wing D maximum diameter of fuselage e wing buckling exponent e C wing cover material factor E Young's modulus of shell material E F Young's modulus of frame material F cy compressive yield strength F S shear strength F tu ultimate tensile strength h ...
A Yankee prototype, 80% silver-15% indium-5% cadmium alloy. control-rod absorber section was manufactured in accordance with procedures and specifications recommended for making 24 similar control-rod absorbers for the Yankee Core I. Fabrication information is presented in detail. (auth)
Countercurrent flow absorber and desorber devices are provided for use in absorption cycle refrigeration systems and thermal boosting systems. The devices have increased residence time and surface area resulting in improved heat and mass transfer characteristics. The apparatuses may be incorporated into open cycle thermal boosting systems in which steam serves both as the ...
A novel composite neutronic reactor control element is offered. The element comprises a multiplicity of sections arranged in end-to-end relationship, each of the sections having a markedly different neutron-reactive characteristic. For example, a three-section control element could contain absorber, ...
