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

Now showing items 741-760 of 3613

    • NASA-LLIS-1608 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2005
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Abstract:
      Variations in component production lots; Low-inductance ground and power planes/paths within (sub)systems are essential for proper operation.
      Following the recommendations from the X43A ...
      Subject(s) : Accident Investigation , Flight Equipment , Hardware , Safety & Mission Assurance , Test & Verification ,

    • NACA-TR-819 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1945
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: General formulas are given for propellers for the rate of change of side-force coefficient with angle of yaw and for the rate of change of pitching-moment coefficient with angle of yaw. Charts of the side-force derivative ...
      Subject(s) : AERODYNAMIC , ANGLES , ASPECT , BLADES , COMPUTATION , CONTRAROTATING , DOWNWASH , FORCES , FORMULAS , GEOMETRY , MATHEMATICS , MOMENTS , PITCHING , PROPELLER , PROPELLERS , RATIO , UPWASH , WINGS , YAW ,

    • NASA-GB-A301 ERTA 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2002
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: GENERAL
      The NASA Software Assurance Guidebook classifies the software quality assurance (SQA) audit as a fundamental quality assurance technique. It is the intent of this guidebook to further define audits, describe ...

    • NASA-LLIS-0918 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2000
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Description of Driving Event:
      During installation of the Thermal Micrometeorite Guard (TMG), the Short Extravehicular Mobility Unit (EMU) #3018 fell from the EMU ground test fixture (EGTF) to the floor. ...
      Subject(s) : Administration/Organization , Configuration Management , Flight Equipment , Flight Operations , Ground Equipment , Ground Operations , Hardware , Policy & Planning , Risk Management/Assessment , Test & Verification , Test Article , Test Facility , Training Equipment ,

    • NACA-TN-3785 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1957
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: A generalized crippling analysis for short monolithic panels with formed or extruded stiffeners is presented. Methods are presented for determining if riveted panels act in a monolithic manner and for determining the ...
      Subject(s) : ALLOYS , ALUMINUM , BUCKLING , COLUMNS , COMPRESSIVE , CONSTRUCTION , FAILURE , FLAT , HANDBOOKS , JOINTS , MATERIALS , MODES , PANELS , PLATES , RIGID , RIVETED , STABILITY , STRENGTH , STRUCTURAL , STRUCTURES , SUPPORTS , TESTS , THEORIES , WRINKLING , YIELD ,

    • NASA-TM-X-1958 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1970
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Variable pressure leakage flow rate analysis on labyrinth seals.
      Subject(s) : AIR FLOW , FLOW VELOCITY , LABYRINTH , LEAKAGE , PRESSURE EFFECTS , SEALS (STOPPERS) , VARIABILITY ,

    • NACA-TR-1109 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1952
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Measurements of base pressure are presented for 29 blunttrailing-edge wings having an aspect ratio of 3.0 and various airfoil profiles. The different profiles comprised thickness ratios between 0.05 and 0.10, boat tail ...
      Subject(s) : ANGLE , ANGLES , ATTACK , BASE , BLUNT , BOATTAILS , BOUNDARY , EDGES , FLOW , GEOMETRY , LAMINAR , LAYER , MACH , NUMBER , PRESSURE , PROFILES , RATIO , REYNOLDS , SPAN , SPEED , SUPERSONIC , TESTS , THICKNESS , TRAILING , TUNNEL , TURBULENT , WIND , WING , WINGS ,

    • NASA-LLIS-0553 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1997
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Description of Driving Event:
      A particulate sampling filter was ruptured during use due to excessive differential pressure. The filter was in use in an oxygen system, and the Quality Assurance technician ...

    • NASA-LLIS-1381 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1999
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Abstract:
      Many of the problems experienced by NASA projects are not as unique as they may first seem.
      This lesson contains major findings from a 1999 review of the Mars Climate Observer (MCO) mishap ...
      Subject(s) : Accident Investigation , Mishap Reporting , Program and Project Management , Risk Management/Assessment ,

    • NACA-TN-3663 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1956
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: An experimental investigation was conducted t o determine the effects of various geometric and flow factors on the discharge coefficients for circular holes having flow parallel to the plane of the hole. The geometric and ...

    • NASA-CR-4653 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1995
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: This report documents the results of an experimental investigation on the response of a cavity to external flowfields. The primary objective of this research was to acquire benchmark of data on the effects of cavity length, ...
      Subject(s) : ACOUSTIC , AEROACOUSTICS , AERODYNAMIC , BOUNDARY , CAVITIES , CAVITY , DIRECTIVITY , EFFECTS , FLOW , JETS , LAYER , MACH , MEASUREMENT , NOISE , NUMBER , SUBSONIC , TEMPERATURE , TESTS , TUNNEL , TURBULENT , UPSTREAM , WALL , WIND ,

    • NASA-LLIS-0129 

      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 vacuum servicing units provide the capability to evacuate the PRSD tanks and the relief line. The unit consists of a skid mounted frame, electrical and fluid control ...
      Subject(s) : Ground Equipment , Ground Operations , Hardware ,

    • NASA-LLIS-1130 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1999
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Description of Driving Event:
      Lack of Source Code for International Partner Elements of Space Station
      Subject(s) : Aerospace Safety Advisory Panel , Computers , Configuration Management , Software , Spacecraft ,

    • NACA-TN-929 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1944
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: In the past it has been customary to analyze shell-supported frames on the basis of the assumption that frame bending distortion does not affect the character of the sheer resistance in the skin. This assumption has been ...
      Subject(s) : BENDING , DEFORMATION , DISTORTION , FORMS , FRAMES , FUSELAGES , MEMBER , SHEAR , SHELLS , SKIN , STRENGTH , STRUCTURAL , SUPPORTS ,

    • NASA-LLIS-0693 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2000
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Practice:
      Use the currently accepted values for the solar constant, albedo and earth radiation when calculating the heat balance of earth orbiters. This practice provides the heating rates for the black ...

    • NACA-TN-1817 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1949
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: INTRODUCTION
      A theory was recently presented in reference 1 for the plastic buckling under compression of plates with different conditions of support and restraint along the unloaded edges. Good experimental verification ...
      Subject(s) : ALCOA , ALLOY , ALUMINUM , BUCKLING , COMPRESSIVE , DIAGRAMS , PLASTICITY , PLATES , STRAIN , STRENGTH , STRESS , TUBING ,

    • NACA-TR-668 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1939
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Report presents the results of an investigation made in the NACA 7 by 10-foot wind tunnel of large-chord NACA and 23021, and 23030 airfoils with split flaps 10, 20, 30, and 40 percent of the wing chord to determine the ...
      Subject(s) : AERODYNAMIC , AIRFOIL , AIRFOILS , CHARACTERISTICS , COEFFICIENTS , DEFLECTION , DRAG , FLAPS , LIFT , MOMENTS , NUMBER , PITCHING , PROFILES , REYNOLDS , SPLIT , TESTS , THICKNESS , TUNNEL , WIND , WING ,

    • NACA-ARR-L5C01 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1945
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: INTRODUCTION
      Wind-tunnel tests have been made to investigate the characteristics of an NACA 0009 airfoil with a 40-percent – chord flap having medium and large aerodynamic balances of elliptical and blunt nose ...

    • NASA-TM-X-3438 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1977
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: An experimental investigation was conducted in the Ames 12-Foot Wind Tunnel to determine the subsonic aerodynamic characteristics of four forebodies at high angles of attack. The forebodies tested were a tangent ogive with ...
      Subject(s) : AERODYNAMIC , ANGLE , ATTACK , BOUNDARY , FORCES , FOREBODIES , LAYERS , MACH , NUMBER , STABILITY , TESTS , TUNNEL , WIND , YAW ,

    • NASA-LLIS-0890 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2000
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Practice:
      Unique cooling, sealing, draining, and purging methods, along with precision interference fits and vibration damping methods are used in high performance liquid oxygen turbopumps. Coatings ...