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

Now showing items 1901-1920 of 3613

    • NACA-WR-L-380 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1941
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Tests have been made of an NACA 0009 airfoil with a 30-percent-chord flap having a 49.5-percent flap-chord balance with various nose shapes and two gaps. The results have been presented in the form of aerodynamic section ...

    • NASA-LLIS-1093 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2002
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Description of Driving Event:
      The Project chose a commercial vendor to build a unique piece of hardware for a one-shot NASA launch mission. In addition to its contract with NASA, this vendor had several ...
      Subject(s) : Administration/Organization , Flight Equipment , Hardware , Procurement Small Business & Industrial Relations , Risk Management/Assessment ,

    • NASA-LLIS-0905 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2000
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Description of Driving Event:
      After launch it was observed that the Advanced Very High Resolution Radiometer (AVHRR) instrument was running hotter than normal. The design calls for active louvers to ...
      Subject(s) : Ground Operations , Hardware , Launch Process , Spacecraft , Test & Verification ,

    • NACA-TN-3675 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1956
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: An investigation has been conducted in which upflow angles were measured along the horizontal center lines of the propeller planes of a semispan model representing a multiengine airplane with tractor propellers. The wing ...

    • NASA NPD 8074.1 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2009
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: APPLICABILITY
      This NPD is applicable to NASA Headquarters, NASA Centers, and JPL, including Component Facilities.

    • NASA-TM-73726 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1977
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Data were obtained for two phase and gaseous choked flow nitrogen in a long constant area duct of 16200 L/D with a diverging diffuser attached to the exit. Flow rate data were taken along five isotherms (reduced temperature ...
      Subject(s) : DIFFUSERS , FLOW VELOCITY , ISOTHERMS , NITROGEN , PIPE FLOW , PRESSURE , TWO PHASE FLOW ,

    • NACA-TR-1036 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1951
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Models were tested to evaluate effects of Reynolds number for both laminar and turbulent boundary layers. Principal geometric variables investigated were afterbody shape and length-diameter ratio. Force tests and base-pressure ...
      Subject(s) : AFTERBODIES , BASE , BODIES , BOUNDARY , COMPARISON , CONFIGURATIONS , DRAG , FLOW , FRICTION , INDEPENDENT , LAMINAR , LAYER , MACH , NUMBER , PRESSURE , REVOLUTION , REYNOLDS , ROUGHNESS , SEPARATION , SHOCK , SKIN , SPEED , SUPERSONIC , SURFACE , TESTS , THEORIES , TRANSITION , TUNNEL , TURBULENT , VARIABLES , VISCOUS , WAVES , WIND ,

    • NASA-LLIS-0543 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1996
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Description of Driving Event:
      The original EMI filters on MIDAS were not matched with the power converter, and were not successful in keeping the EMI below the required level.
      Subject(s) : Configuration Management , Hardware ,

    • NASA-LLIS-1354 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2003
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Description of Driving Event:
      In early February 2003, JPL and NASDA reported gaps in Level 0 data products received from the Wallops and Alaska ADEOS-II Data Processing Systems. Gaps in the SeaWinds ...
      Subject(s) : Configuration Management , Ground Equipment , Ground Operations , Test & Verification ,

    • NACA-TN-2966 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1953
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: The preliminary selection of a propeller on the basis of cruising and take-off performance for application to transport airplanes at flight Mach numbers up to 0.8 can be accomplished by the use of charts and methods ...
      Subject(s) : AIRCRAFT ENGINES , CRUISING FLIGHT , GRAPHS (CHARTS) , HORSEPOWER , NOISE (SOUND) , PERFORMANCE , PROPELLER EFFICIENCY , PROPELLERS , REDUCTION , TAKEOFF , THRUST , TRANSPORT AIRCRAFT ,

    • NASA-CR-2682 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1975
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: A fluid mechanical model of the acoustic behavior of small orifices is presented which predicts orifice resistance and reactance as a function of incident sound pressure level, frequency, and orifice geometry. Agreement ...
      Subject(s) : ACOUSTIC , FLOW , FLUID , IMPEDANCE , MATHEMATICAL , MECHANICS , MODELS , NONLINEAR , ORIFICE , ORIFICES , PRESSURE , REACTANCE , RESISTANCE , SOUND , SYSTEMS , TRANSMISSION ,

    • NACA-TN-1449 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1947
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: INTRODUCTION
      Recent development in airfoil theory for supersonic speeds (references 1 to 3) indicate pronounced effects of sweepback and aspect ratio on the drag. In reference 3, a method based on thin-airfoil theory ...
      Subject(s) : AIRFOILS , ARC , ASPECT , BICONVEX , CIRCULAR , DRAG , FLOW , FORMULAS , MACH , NUMBER , RATIO , RECTANGULAR , SINKS , SOURCES , SUPERSONIC , SWEPTBACK , THEORIES , WAVE , WINGS ,

    • NASA-LLIS-1118 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1999
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Description of Driving Event:
      Increasing Extravehicular Mobility Unit (EMU) Shielding to Reduce Crew Radiation Exposure
      Subject(s) : Aerospace Safety Advisory Panel , Extra-Vehicular Activity , Flight Equipment , Hazardous/Toxic Waste/Materials , Medical , Research & Development , Safety & Mission Assurance ,

    • NASA-LLIS-6396 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2012
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: JPL experienced a total electrical power loss in June 2010 due to an operator error at a public utility substation. Deficiencies were noted in the emergency response and notifications, and in the operation of emergency ...
      Subject(s) : Additional Categories.Emergency Preparedness , Additional Categories.Facilities , Additional Categories.Fire Protection , Additional Categories.Safety & Mission Assurance , Safety and Mission Assurance.Advanced planning of safety systems , Safety and Mission Assurance.Maintenance ,

    • NASA-LLIS-0743 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2000
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Description of Driving Event:
      On December 8, 1995, a full-scale model of the NASA JSC Experimental Crew Return Vehicle (XCRV) experienced a failure of its parafoil deployment system during a test drop ...
      Subject(s) : Aircraft , Configuration Management , Flight Equipment , Flight Operations , Hardware , Policy & Planning , Research & Development , Risk Management/Assessment , Test & Verification , Test Article ,

    • NASA-LLIS-1850 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2008
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Abstract:
      The CLCS project was initiated in FY 1997 to modernize the Launch Processing System (LPS) that was engineered and developed in the 1970s. The modernization was needed to ensure continued safe ...
      Subject(s) : Additional Categories.Launch Process , Additional Categories.Launch Vehicle ,

    • NASA NPD 2091.1 REV B 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2008
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: APPLICABILITY
      This NPD is applicable to NASA Headquarters and all NASA Centers, including Component Facilities.
      This NPD applies to any invention made by a NASA employee or an employee of another ...

    • NACA-TR-633 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1938
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Report presents the results of pressure-distribution of an NACA 23012 airfoil equipped with a slotted flap and with a plain flap conducted in the 7 by 10-foot wind tunnel. A test installation was used in which the 7-foot-span ...
      Subject(s) : AERODYNAMIC , AIRFOILS , CENTER , COEFFICIENTS , CONTROL , DISTRIBUTION , FLAPS , FORCE , FORCES , MOMENTS , PITCHING , PRESSURE , SLOTS , SURFACES , TESTS , TORQUE , TUNNEL , WIND , WING ,

    • NACA-ARR-L4I12 REV A 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1944
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: INTRODUCTION
      In reference 1, an analytical treatment is given of the effect of propeller operation on the pitching moments of single-engine monoplanes with flaps neutral. The analysis, which is based on simplifying ...

    • NASA-TN-D-2970 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1965
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Numerical methods and computer programs for two-dimensional and axisymmetric supersonic flow over blunt-nosed and flared bodies
      Subject(s) : ANALYSIS , AXISYMMETRIC , BLUNT , BODIES , BODY , COMPUTER , DIMENSIONAL , FLARED , FLOW , NUMERICAL , PROGRAM , PROGRAMS , SUPERSONIC , SYMMETRY , TWO ,