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

Now showing items 3161-3180 of 3613

    • NACA-TN-3356 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1955
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Two models were tested for which the rate of change of sidewash with angle of sideslip could be varied. For the first model, this effect was obtained by mounting auxiliary vertical fins on the fuselage at the assumed center ...

    • NASA-LLIS-1347 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2003
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Description of Driving Event:
      Most of the components that comprise the NASA Ground Network that supports the ADEOS-II mission were provided to the NGN as contributions from operational entities under ...
      Subject(s) : Ground Equipment , Ground Operations , Information Technology/Systems ,

    • NASA-CR-191413 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1992
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: The transition to turbulence in a boundary layer over a flat plate with mild surface undulations is simulated using the parabolized stability equations (PSE). The simulations incorporate the receptivity, the linear growth, ...
      Subject(s) : BOUNDARY LAYER TRANSITION , COMPUTATIONAL FLUID DYNAMICS , FLAT PLATES , PERTURBATION , RIBLETS , SIMULATION , SOUND FIELDS , SURFACE ROUGHNESS , TURBULENCE ,

    • NASA-LLIS-0503 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1994
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Subject(s) : Parts Materials & Processes , Safety & Mission Assurance , Test Facility ,

    • NASA-LLIS-0291 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1993
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Description of Driving Event:
      During burn-in testing of an orbiter General Purpose (Flight) Computer (GPC) in the JSC avionics engineering laboratory, a "fail to synchronize" error was detected. This ...
      Subject(s) : Test & Verification , Test Article ,

    • NASA-LLIS-1326 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2002
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Description of Driving Event:
      Since the formal requirement (NPG 7120.5) which drives documentation of lessons learned into the LLIS database is not being met, project managers develop an informal ...
      Subject(s) : Administration/Organization , Human Factors , Policy & Planning ,

    • NACA-RM-L8K22 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1949
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: INTRODUCTION
      Some of the problems encountered with the use of thin airfoils and sweep back on wings of high speed airplanes are low maximum lift and tip stalling.
      Previous investigations of airfoils of various ...

    • NACA-TM-1050 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1943
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: A method for recording the local heat-transfer coefficients on bodies in flow was developed. The cylinder surface was kept at constant temperature by the condensation of vapor except for a narrow strip which is heated ...
      Subject(s) : HEAT TRANSFER , HEAT TRANSFER COEFFICIENTS , HEAT TRANSMISSION , HIGH TEMPERATURE TESTS , REYNOLDS NUMBER , TRANSVERSE WAVES ,

    • NASA-LLIS-0353 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1994
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Abstract:
      During a recalibration test of the Galileo NIMS flight instrument in a subsystem vacuum chamber, a facility failure subjected it to subjected to a temperature below its qualification limits. ...
      Subject(s) : Cryogenic Systems , Environment , Facilities , Science Instruments , Test Facility ,

    • NASA-LLIS-0101 

      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 proof load test operator installed a 3 leg sling H77-0235 in the tensile machine to proof load test a "D" and/or an "O" ring to 72,000 lbs and 52,000 lbs. The tensile ...
      Subject(s) : Ground Operations , Hardware , Industrial Operations , Lifting Devices , Test Facility ,

    • NASA-LLIS-1097 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2001
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Description of Driving Event:
      The STS-88/2A mission had around 150 Chits written requesting information from the Mission Evaluation Room (MER), Flight Control Team, or Moscow. The ISS MER Chits did not ...
      Subject(s) : Administration/Organization , Aerospace Safety Advisory Panel , Configuration Management , External Relations , Flight Operations , Ground Operations , Independent Verification and Validation , Policy & Planning , Risk Management/Assessment , Safety & Mission Assurance ,

    • NASA-LLIS-0721 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2000
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Practice:
      Use the PSAM (Probabilistic Structural Analysis Methods) contained in the computer code NESSUS (Numerical Evaluation of Stochastic Structures Under Stress) to identify and quantify the ...

    • NACA-TN-2324 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1951
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: This report presents information on the axial-load fatigue behavior of unnotched specimens of each of three sheet materials: 24S-T3 and 75S-T6 aluminum alloys and normalized SAE 4130 steel.
      The experimental investigation ...

    • NACA-TR-539 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1936
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: This report gives the results of an investigation conducted in the NACA full-scale wind tunnel on a small parasol monoplane equipped with three different split trailing-edge wing flaps. The object of the investigation was ...
      Subject(s) : AERODYNAMIC , DISTRIBUTION , DRAG , EDGE , FLAPS , FORCES , FULL , HINGES , LIFT , LOCATION , MOMENTS , MONOPLANES , PITCHING , POSITION , PRESSURE , SCALE , SPLIT , TESTS , TRAILING , TUNNEL , WIND , WING ,

    • NASA-TP-3669 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1997
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: An experimental investigation was conducted in the Langley 8-Foot Transonic Pressure Tunnel to determine the flow characteristics of rectangular cavities with varying relative dimensions at subsonic and transonic speeds. ...
      Subject(s) : BOUNDARY , CAVITY , CHARACTERISTICS , FLOW , FREE , LAYER , MACH , MEASUREMENT , NUMBER , PRESSURE , RESONATORS , REYNOLDS , SPEED , STATIC , SUBSONIC , TRANSONIC , TUNNELS , TURBULENT , UNSTEADY , WIND ,

    • NASA-LLIS-1805 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2007
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Abstract:
      Contact was lost with the Mars Global Surveyor (MGS) spacecraft in November 2006 during its 4th extended mission. A routine memory load command sent to an incorrect address 5 months earlier ...
      Subject(s) : Additional Categories.Communication Systems , Additional Categories.Flight Equipment , Additional Categories.Flight Operations , Additional Categories.Ground Equipment , Additional Categories.Ground Operations , Additional Categories.Hardware , Additional Categories.Payloads , Additional Categories.Software , Additional Categories.Spacecraft , Engineering Design (Phase C/D). , Engineering Design (Phase C/D).Power , Engineering Design (Phase C/D).Software Engineering , Engineering Design (Phase C/D).Spacecraft and Spacecraft Instruments , Mission Operations and Ground Support Systems. , Mission Operations and Ground Support Systems.Mission control Planning , Mission Operations and Ground Support Systems.Mission operations systems , Missions and Systems Requirements Definition. , Missions and Systems Requirements Definition.Mission concepts and life-cycle planning , Missions and Systems Requirements Definition.Requirements critical to costing and cost credibility , Missions and Systems Requirements Definition.Review boards , Program Management.Configuration and data management , Safety and Mission Assurance. , Safety and Mission Assurance.Review systems and boards , Systems Engineering and Analysis. , Systems Engineering and Analysis.Long term sustainability and maintenance planning ,

    • NASA-LLIS-1515 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2004
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Abstract:
      A lack of adequate workforce in the early days of the project delayed development of plans and complicated the project's formulation. Each project should be treated as a new effort with ...
      Subject(s) : Policy & Planning , Program and Project Management , Research & Development , Risk Management/Assessment ,

    • NASA-LLIS-6149 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2012
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Residual hydrogen in the fill and drain line during the terminal count down sequence could lead to a catastrophic failure. The best practice is to connect the purge line to the propellant line as closely as possible to the ...
      Subject(s) : 1.Cryogenic Systems , 1.Flight Operations , 1.Launch Systems , 1.Launch Vehicle , 1.Level II/III requirements definition , 1.Propulsion , 1.Spacecraft , 1.Vehicle concepts ,

    • NASA-TN-D-363 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1960
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: An investigation of the aerodynamic characteristics of a semispan wing equipped with a 38.5-percent-chord sliding flap partially immersed in the slipstream of two propellers has been conducted in the 17-foot test section ...
      Subject(s) : AERODYNAMIC , AIR , CHARACTERISTICS , COEFFICIENTS , CONTROL , DEFLECTION , DISTRIBUTION , FLAPS , FLOW , JET , PRESSURE , SURFACES , WING ,

    • NASA-CR-3966 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1986
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: An experimental and theoretical study was conducted to develop a validated first principle analysis for predicting the jet noise reduction achieved by shielding one jet exhaust flow with a second, closely spaced, identical ...