NASA - National Aeronautics and Space Administration (NASA): Recent submissions

Now showing items 2941-2960 of 3613

    • NACA-TN-4041 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1957
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: An investigation has been conducted horizontal-tail location and size on the to determine the effects of longitudinal aerodynamic characteristics of an airplane model having a triangular wing. The wing had an aspect ratio ...

    • NASA-LLIS-0840 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2000
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Practice:
      Predict the mean time to repair (MTTR) of avionics and ground electronics systems at any level of maintenance (on orbit, intermediate or depot level) using analytical methods . This technique ...

    • NASA NPG 1800.1 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2002
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: PURPOSE. This NASA Procedures and Guidelines (NPG) describes processes for implementing and managing the NASA Occupational Health Program (OHP). The OHP is the overreaching Agency function encompassing two major components ...

    • NACA-TR-740 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1942
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: A theoretical analysis is given for the stresses and deflections of a square plate with clamped edges under normal pressure producing large deflections. Values of the bending stress and membrane stress at the center of the ...
      Subject(s) : BENDING , CLAMPS , COEFFICIENTS , DEFLECTION , EDGES , FLAT PLATES , NUMERICAL ANALYSIS , PRESSURE , SQUARES (MATHEMATICS) , STRESS ANALYSIS , THICKNESS ,

    • NASA-LLIS-0052 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1992
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Description of Driving Event:
      The "Call Contractor" system utilized by the contractor MOD management has the least control of "how" a modification is performed. The "Call Contractor", utilizing "good ...
      Subject(s) : Administration/Organization , Facilities , Industrial Operations , Safety & Mission Assurance ,

    • NASA-LLIS-0599 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1998
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Abstract:
      Performance problems with NiCd rechargeable batteries, which drastically affected the lifespan of several military satellites, led JPL to review existing battery management techniques. Optimized ...
      Subject(s) : Energy , Research & Development ,

    • NASA-CR-742 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1967
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Structural composite damping with viscoelastic shear-damping mechanisms.
      Subject(s) : COMPOSITE STRUCTURE , COMPOSITE STRUCTURES , DAMPING , DYNAMIC STRUCTURAL ANALYSIS , SHEAR STRAIN , STRUCTURAL VIBRATION , VIBRATION DAMPING , VISCOELASTIC DAMPING , VISCOELASTICITY ,

    • NASA-LLIS-1471 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2003
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Abstract:
      There is a need for an independent Accident Investigation Board to establish and adopt a formal policy for use, retention, and archiving of investigation-related e-mail to minimize inadvertent ...
      Subject(s) : Accident Investigation , Administration/Organization , Computers , Configuration Management , Information Technology/Systems , NASA Standards , Policy & Planning , Safety & Mission Assurance , Security ,

    • NASA-LLIS-0879 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2000
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Practice:
      This practice will increase equipment reliability and decrease maintenance by preventing unnecessary repairs to equipment, personnel time loss, and schedule impact due to liquid intrusion. ...

    • NACA-TN-2360 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1951
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Wind-tunnel tests were performed at Mach numbers of 1.5 and 2.0 to investigate the influence of tail surfaces on the base drag of a body of revolution without boattailing and having a turbulent boundary layer. The tail ...
      Subject(s) : AAL , BASE , BODIES , BOUNDARY , COMPRESSIBILITY , CRUCIFORM , DISTRIBUTION , EFFECT , FEET , FOOT , INTERFERENCE , LAYER , MISSILE , POSITION , PRESSURE , REVOLUTION , SUPERSONIC , SURFACES , TAIL , TESTS , TUNNEL , WIND ,

    • NASA NPR 8000.4 REV A 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2008
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Purpose
      This NASA Procedural Requirements (NPR) document provides the requirements for risk management for the Agency, its institutions, and its programs and projects as required by NASA Policy Directive ...

    • NACA-RM-A52B20 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1952
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: INTRODUCTION
      An investigation of the effects of Mach number and Reynolds number on the aerodynamic characteristics of several 12-percent-thick wings having 35° of sweepback and various amounts of camber has been ...

    • NACA-TN-2392 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1951
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Charts giving the compressive-buckling-stress coefficients for sheet panels of a shape occurring in swept-wing plan forms are presented. The panels are assumed to be a part of a continuous flat sheet divided by nondeflecting ...

    • NASA-LLIS-0171 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1992
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Description of Driving Event:
      OSHA requirements for handrails, kickplate, and ladders are not met. Platforms inside the tail service mast (TSM) do not have handrails to prevent personnel from falling ...
      Subject(s) : Facilities , Personal Protective Equipment ,

    • NACA-TM-1105 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1946
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: For two- and three-dimensional flow in a compressible medium, a simple relation is given by which, to a first approximation, the quantitative influence of compressibility upon the velocities and pressures can be understood ...
      Subject(s) : AXISYMMETRIC , BODIES , CRITICAL , CYLINDRICAL , DIMENSIONAL , ELLIPSOIDS , FLOW , MACH , NUMBER , SLENDER , SPEED , SUBSONIC , THREE , TWO , VELOCITY ,

    • NASA-LLIS-1194 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2001
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Description of Driving Event:
      Several days prior to the launch of the GOES-M/Atlas II mission in July of 2001 a discontinuity was identified regarding what the spacecraft response would be to specific ...
      Subject(s) : Flight Operations , Ground Operations , Launch Process , Spacecraft ,

    • NASA-LLIS-0814 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2000
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Practice:
      Implement a 100% nondestructive screening test on EEE parts prior to assembly, which would prevent early-life failures (generally referred to as infant mortality).

    • NASA-LLIS-0531 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1997
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Description of Driving Event:
      An employee walked into a board with nails that was sticking out of the back of a pickup truck. The employee only suffered minor cuts and scratches to the face, but could ...
      Subject(s) : Occupational Health , Safety & Mission Assurance ,

    • NASA-LLIS-0023 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1992
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Description of Driving Event:
      The payload canister consists of a canister shell and two cargo bay doors driven by air motors. The cargo bay door operations are controlled by a flow control valve with ...
      Subject(s) : Flight Equipment , Flight Operations , Hardware , Launch Vehicle , Parts Materials & Processes , Spacecraft ,

    • NACA-TR-658 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1939
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Two 3-blade 10-foot propellers were operated in front of a liquid-cooled engine nacelle. The propellers differed only in pitch distribution; one had normal distribution (nearly constant pitch for a blade angle of 15 degrees ...