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

Now showing items 1061-1080 of 3613

    • NASA-TN-D-4448 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1968
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Wind tunnel determination of longitudinal force characteristics for STOL aircraft scale models with varying wing aspect ratios
      Subject(s) : AERODYNAMIC , AIRCRAFT , CHARACTERISTICS , CONTROL , EDGE , FLAPS , LIFT , LONGITUDINAL , MODELS , PROPELLER , SHORT , SLIPSTREAMS , STABILITY , TAKEOFF , TRAILING , TUNNEL , WIND ,

    • NASA-LLIS-1318 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2002
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Description of Driving Event:
      An onsite maintenance and operations contractor was tasked to erect scaffolding inside of a wind tunnel test section so that a heavy gas door seal could be replaced. The ...
      Subject(s) : Human Factors ,

    • NACA-RM-L56E29 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1956
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: INTRODUCTION
      The design trend of high-speed airplanes has resulted in certain combinations of airplane aerodynamic and mass characteristics which have sometimes allowed some of these airplanes to attain attitudes in ...

    • NACA-RM-L51G09 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1951
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: A preliminary investigation was conducted in a duct system having fully developed pipe flow to determine the effectiveness of vortex generators in improving the performance of a 21-inch-diameter straight-outer-wall annular ...

    • NASA-LLIS-6656 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2012
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Recent NASA spaceflight projects that have undergone IV&V of their mission software perceive the process as offering concrete benefits beyond those accrued through V&V performed solely by project personnel. The specific ...

    • NASA-LLIS-0341 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1994
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Description of Driving Event:
      Oscillations at the inlet tee in the LOX dome of the main combustion chamber were being caused by the LOX Flowing over the two vane splitter. The vibrations were causing ...
      Subject(s) : Hardware , Parts Materials & Processes ,

    • NASA-LLIS-2048 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2009
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Abstract:
      In-flight the EPOXI spacecraft exhibited a safe mode instability after a portion of the torque distribution was assigned to a reaction wheel that had been powered down. It was determined that ...
      Subject(s) : Flight Equipment , Flight Operations , Ground Operations , Hardware , Mission operations systems , Software , Software Engineering , Spacecraft ,

    • NASA-LLIS-1085 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2000
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Abstract:
      An attendant left workers unattended in an electrical manhole, suggesting a lax attitude towards confined space guidelines.
      Improve training, audit, and onsite management of high voltage ...
      Subject(s) : Communication Systems , Emergency Preparedness , Energy , Facilities , Human Factors , Industrial Operations , Logistics , Mishap Reporting ,

    • NASA-LLIS-0709 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2000
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Practice:
      Use Class S and Grade 1 or equivalent parts in all applications requiring high reliability or long life to yield the lowest possible failure rates. (Long life is defined as a requirement to ...

    • NASA NPD 8700.1 REV E 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2008
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: APPLICABILITY
      This NPD applies to NASA Headquarters, NASA Centers, including Component Facilities, NASA Technical and Support Service Centers, and to JPL to the extent specified in its contract.

    • NASA-LLIS-1780 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2007
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Abstract:
      Lessons from JPL spaceflight projects initiated in the 1990s demonstrate that the flight project manager (PM) must maintain a buffer of reserves that will be sufficient to overcome the problems ...
      Subject(s) : Missions and Systems Requirements Definition. , Missions and Systems Requirements Definition.Review boards , Program Management. , Program Management.Acquisition / procurement strategy and planning , Program Management.Business processes , Program Management.Center distribution of programs and management activities , Program Management.Program planning , development , and management ,

    • NASA-LLIS-1501 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2003
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Abstract:
      The Orbital Space Plane (OSP) problems were the result of (1) a lack of a disciplined, well communicated, Level 1 requirements development process, (2) open or architecture-free Level 2 ...
      Subject(s) : Administration/Organization , Policy & Planning , Program and Project Management ,

    • NASA-TP-2478 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1985
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: An investigation was conducted in the Langley 8 Foot Transonic Pressure Tunnel to determine the effect of aileron deflections on the aerodynamic characteristics of a subsonic energy efficient transport (EET) model. The ...
      Subject(s) : AERODYNAMIC , AILERONS , AIRCRAFT , ANGLE , ATTACK , CHARACTERISTICS , CHARTS , DEFLECTION , DISTRIBUTION , GRAPHS , LOADS , MACH , MODELS , NUMBER , PRESSURE , REYNOLDS , SUPERCRITICAL , TESTS , TRANSPORT , TUNNEL , WIND , WINGS ,

    • NASA-LLIS-2916 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2010
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Abstract:
      The Space Shuttle Program Orbiter Avionics Line Replaceable Unit's (LRU) were designed with limited or no diagnostic capability. The lack of fault isolation capability resulted in flight ...
      Subject(s) : Acquisition / procurement strategy and planning , Engineering design and project processes and standards , Ground processing and manifesting , Ground support systems , Human factors planning , Launch support systems ,

    • NASA-CR-2066 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1972
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: A user\'s manual is presented for a computer program for predicting the performance (static, flight, and reverse), noise, weight and cost of propellers for advanced general aviation aircraft of the 1980 time period. Complete ...
      Subject(s) : AERODYNAMIC NOISE , COMPUTER PROGRAMS , COST ANALYSIS , GENERAL AVIATION AIRCRAFT , PERFORMANCE PREDICTION , PRODUCT DEVELOPMENT , PROPELLERS , WEIGHT ANALYSIS ,

    • NASA-LLIS-0487 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1997
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Abstract:
      This lesson provides several examples of incompatible materials in propulsion systems that posed a major risk to Cassini and Mars Global Surveyor, and may have led to the loss of Mars Observer. ...
      Subject(s) : Hardware , Heritage Hardware , Mars Observer (MO) , Parts Materials & Processes ,

    • NASA-LLIS-0259 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1993
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Description of Driving Event:
      General purpose computer S/N 00513 at the JAEL test facility operated for 11.5 hours without cooling. The lack of forced air ventilation was caused by an air duct cover ...
      Subject(s) : Flight Equipment , Hardware ,

    • NASA-TN-D-8524 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1977
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Aerodynamic characteristics of a general aviation wing equipped with NACA 65 sub 2-415, NASA GA(W)-1, and NASA GA(PC)-1 airfoil sections were examined. The NASA GA(W)-1 wing was equipped with plain, split, and slotted ...
      Subject(s) : AERODYNAMIC , AIRCRAFT , AVIATION , BODY , CHARACTERISTICS , CONFIGURATIONS , CONTROL , DRAG , FLAPS , GENERAL , LIFT , SURFACES , TESTS , TUNNEL , WIND , WING ,

    • NACA-RM-L54C05 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1954
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: INTRODUCTION
      The reduced lift capabilities of conventional high-lift devices when applied to sweptback-wing aircraft constitute a severe low-speed performance problem. Means for improving the maximum lift capabilities ...

    • NACA-TR-D-949 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1949
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: An experimental investigation at low airspeeds was made of the filling effect observed when a screen or similar resistance is placed across a diffuser. The filling effect is found to be real in that screens can prevent ...
      Subject(s) : AIR FLOW , ANGLES (GEOMETRY) , DAMPING , DIFFUSERS , INLET FLOW , RESISTANCE , RESTORATION , SCREENS , SEPARATED FLOW , SHAPES , TURBULENCE , TURBULENT DIFFUSION , WIND TUNNELS ,