1–20 von 288 Ergebnissen
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    Thermal structures - Four decades of progress

    Thornton, Earl A. | NTRS | 1990
    Since the first supersonic flight in October 1947, the United States has designed, developed and flown flight vehicles within increasingly ...
    Verlag: NASA National Aeronautics and Space Administration
    Schlagwörter: Aircraft Design, Testing And Performance

    Structural design considerations for a Personnel Launch System

    Bush, Lance B. / Lentz, Christopher A. / Robinson, James C. et al. | NTRS | 1990
    /preliminary design stages at the NASA Langley Research Center. Structural definition of this Personnel Launch System (PLS) and the considerations ...
    Verlag: NASA National Aeronautics and Space Administration
    Schlagwörter: Launch Vehicles And Space Vehicles

    Experimental aeroelasticity history, status and future in brief

    Ricketts, Rodney H. | NTRS | 1990
    NASA conducts wind tunnel experiments to determine and understand the aeroelastic characteristics of new and advanced flight vehicles ...
    Verlag: NASA National Aeronautics and Space Administration
    Schlagwörter: Research And Support Facilities (Air)

    Preliminary design considerations for 10 to 40 meter-diameter precision truss reflectors

    Mikulas, Martin M., Jr. / Collins, Timothy J. / Hedgepeth, John M. | NTRS | 1990
    rapid assessment of a wide range of reflector parameters as well as new structural concepts and materials. The preliminary design approach was ...
    Verlag: NASA National Aeronautics and Space Administration
    Schlagwörter: Structural Mechanics

    Digital-flutter-suppression-system investigations for the active flexible wing wind-tunnel model

    Perry, Boyd, III / Mukhopadhyay, Vivek / Hoadley, Sherwood Tiffany et al. | NTRS | 1990
    Active flutter suppression control laws were designed, implemented, and tested on an aeroelastically-scaled wind-tunnel model in the NASA ...
    Verlag: NASA National Aeronautics and Space Administration
    Schlagwörter: Aircraft Stability And Control

    Experimental transonic flutter characteristics of supersonic cruise configurations

    Durham, Michael H. / Cole, Stanley R. / Cazier, F. W., Jr. et al. | NTRS | 1990
    biconvex airfoil and a leading-edge sweep of 73 deg out to a cranked tip with a 60 deg leading-edge sweep. The ground vibration tests and flutter ...
    Verlag: NASA National Aeronautics and Space Administration

    A mobile transporter concept for EVA assembly of future spacecraft

    Watson, Judith J. / Bush, Harold G. / Heard, Walter L., Jr. et al. | NTRS | 1990
    assist EVA astronauts in the assembly of the Space Station Freedom. 1-g and simulated O-g (neutral buoyancy) tests were conducted to evaluate the ...
    Verlag: NASA National Aeronautics and Space Administration
    Schlagwörter: Spacecraft Design, Testing And Performance

    Three dimensional full potential method for the aeroelastic modeling of propfans

    Williams, Marc H. / Ku, Chieh C. | NTRS | 1990
    loading, unsteady aerodynamic response to forced aeroelastic deformations, and free aeroelastic response. Comparisons are made to experimental ...
    Verlag: NASA National Aeronautics and Space Administration

    Rotary-wing aeroelasticity with application to VTOL vehicles

    Friedmann, Peretz P. | NTRS | 1990
    . The main topics discussed are: (1) structural modeling; (2) unsteady aerodynamic modeling; (3) formulation of the equations of motion and ...
    Verlag: NASA National Aeronautics and Space Administration

    Structural dynamic and aeroelastic considerations for hypersonic vehicles

    Cazier, F. W., Jr. / Doggett, Robert V., Jr. / Ricketts, Rodney H. | NTRS | 1991
    The specific geometrical, structural, and operational environment characteristics of hypersonic vehicles are discussed with particular ...
    Verlag: NASA National Aeronautics and Space Administration

    Transonic shock-induced dynamics of a flexible wing with a thick circular-arc airfoil

    Bennett, Robert M. / Dansberry, Brian E. / Farmer, Moses G. et al. | NTRS | 1991
    A simple flexible wing model with an 18-percent circular arc airfoil was constructed and tested in the Langley Transonic Dynamics Tunnel to ...
    Verlag: NASA National Aeronautics and Space Administration

    Analysis and correlation of SA349/2 helicopter vibration

    Heffernan, Ruth / Precetti, Dominique / Johnson, Wayne | NTRS | 1991
    Helicopter airframe vibration is examined using calculation and measurements for the SA349/2 research helicopter. The hub loads, which ...
    Verlag: NASA National Aeronautics and Space Administration
    Schlagwörter: Aircraft Stability And Control

    A case study in multi-component software development

    Sangha, Karan / Straub, Friedrich | NTRS | 1991
    multicontractor and multi-site environment within which the development took place, the development standards used and evolution of the final product ...
    Verlag: NASA National Aeronautics and Space Administration
    Schlagwörter: Computer Programming And Software

    An overview of NASA research related to the aging commercial transport fleet

    Harris, Charles E. / Heyman, Joseph S. | NTRS | 1991
    This paper describes the research activities of the NASA Airframe Structural Integrity Program for the aging commercial transport fleet ...
    Verlag: NASA National Aeronautics and Space Administration

    Dynamic response of a hammerhead launch vehicle wind-tunnel model

    Cole, Stanley R. / Henning, Thomas L. | NTRS | 1991
    with a view to both the buffet response and the dynamic stability of off-design conditions. No dynamic instabilities were discovered among the ...
    Verlag: NASA National Aeronautics and Space Administration
    Schlagwörter: Launch Vehicles And Space Vehicles

    Blade root torsional dampers to reduce hub loads

    Kottapalli, Sesi | NTRS | 1992
    A new method of reducing helicopter rotor hub loads and marginally improving rotor performance by the introduction of large values of blade ...
    Verlag: NASA National Aeronautics and Space Administration
    Schlagwörter: Aircraft Design, Testing And Performance

      Blade root torsional dampers to reduce hub loads

      Kottapalli, S. | Tema Archiv | 1992
      A new method of reducing helicopter rotor hub loads and marginally improving rotor performance by the introduction of large values of blade ...

    Study of weld offset in longitudinally welded SSME HPFTP inlet

    Min, J.B. / Spanyer, K.S. / Brunair, R.M. | Tema Archiv | 1992
    , lack of fusion, and weld offsets. Currently, the sensitivity of welded structures to defects is of concern. From a fatigue standpoint, weld ...

    Overview and major characteristics of future aeronautical and space systems

    Venneri, Samuel L. / Noor, Ahmed K. | NTRS | 1992
    A systematic projection is made of prospective materials and structural systems' performance requirements in light of emerging applications ...
    Verlag: NASA National Aeronautics and Space Administration

    Aeroelastic response and blade loads of a composite rotor in forward flight

    Smith, Edward C. / Chopra, Inderjit | NTRS | 1992
    related warping and inplane elasticity is integrated with the University of Maryland Advanced Rotorcraft Code. The structural dynamics analysis is ...
    Verlag: NASA National Aeronautics and Space Administration
    Schlagwörter: Aircraft Stability And Control