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

Now showing items 1541-1560 of 3613

    • NASA-LLIS-0174 

      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 OPF payload bay bridge hoist system spans the length of the shuttle payload bay. Two bridges, mounted on platforms, move on rails. On each bridge are two moveable ...
      Subject(s) : Facilities , Lifting Devices ,

    • NACA-TN-708 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1939
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: A method is presented for the rapid calculation of the pressure distribution over an airfoil section when the normal-force distribution and the pressure distribution over the "base profile" (i.e., the profile of the same ...

    • NASA-LLIS-1218 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2002
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Description of Driving Event:
      A project required purchase of an indefinite quantity of hardware spread over several years. The hardware was procured for this project using a modified Blanket Purchase ...
      Subject(s) : Configuration Management , Ground Equipment , Hardware , Logistics , Parts Materials & Processes , Procurement Small Business & Industrial Relations , Research & Development ,

    • NASA-LLIS-0608 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1999
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Abstract:
      When communications are phrased ambiguously, foreign partners who use English as a second language may misinterpret requirements. In the case of the Huygens probe, a requirement specifying ...
      Subject(s) : Administration/Organization , Configuration Management , External Relations , Interface Control , International Partners , Interpretation , Joint Venture ,

    • NASA NPR 1600.2 W/CHG 1 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2012
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: PURPOSE
      a. This NASA Procedural Requirement (NPR) establishes Agency-wide policy for the protection of Classified National Security Information (CNSI).
      b. This NPR prescribes personnel responsibilities ...

    • NASA-LLIS-0055 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1992
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Description of Driving Event:
      During servicing of the oxidizer on the forward reaction control system (FRCS), a ground half quick disconnect (QD) failed. The failure mode was such that an open flow ...
      Subject(s) : Emergency Preparedness , Energetic Materials - Explosive/Propellant/Pyrotechnic , Fire Protection , Flight Equipment , Ground Equipment , Ground Operations , Hardware , Hazardous/Toxic Waste/Materials , Launch Process , Launch Vehicle , Packaging Handling Storage , Parts Materials & Processes , Personal Protective Equipment , Spacecraft ,

    • NACA REPORT 874 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1947
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: This paper develops a new method for determining the buckling stresses of cylindrical shells under various loading conditions. In part I, the equation for the equilibrium of cylindrical shells introduced by Donnell in NACA ...
      Subject(s) : AEROELASTICITY , ANALYSIS (MATHEMATICS) , AXIAL COMPRESSION LOADS , BUCKLING , COMPARISON , CRITICAL LOADING , CYLINDRICAL SHELLS , DONNELL EQUATIONS , EDGES , ELASTIC SHELLS , SHEAR STRESS , STABILITY , STRESS ANALYSIS , STRESSED-SKIN STRUCTURES , SUPPORTS , THEORIES ,

    • NASA-LLIS-3756 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2011
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Description of Driving Event:
      Troubleshooting LRUs in space launch vehicles was time-consuming throughout the Space Shuttle program. Without knowledge of the internal operations of the LRUs, this process ...
      Subject(s) : Engineering design and project processes and standards , Ground Operations , Ground processing and manifesting , Human Resources & Education ,

    • NASA-LLIS-0602 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1998
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Abstract:
      The Mars Pathfinder project experienced initial workmanship problems with hybrid DC-DC power converters from a vendor who supplies primarily low cost commercial parts. Working closely with ...
      Subject(s) : Parts Materials & Processes , Quality Audit , Safety & Mission Assurance , Supplier Audit ,

    • NASA-LLIS-1444 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2003
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Abstract:
      Difficulty in contacting the IT support person and getting issues resolved, necessitates in situ, resident IT specialists, at least for investigation start-up activities.
      Subject(s) : Accident Investigation , Computers , Configuration Management , Information Technology/Systems , Policy & Planning , Procurement Small Business & Industrial Relations , Safety & Mission Assurance ,

    • NASA-LLIS-0882 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2000
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Practice:
      The use of laser methodology for the critical shaft alignment of rotating machinery.

    • NASA-LLIS-1149 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2000
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Description of Driving Event:
      Implementation of NASA Agency-Wide Computer Security Plan.
      Subject(s) : Aerospace Safety Advisory Panel , Computers , Flight Operations , Ground Operations , Policy & Planning , Risk Management/Assessment , Security , Software ,

    • NACA-TN-2442 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1951
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Factors of stress concentration for deep, sharp, and symmetrically arranged grooves and fillets in tension members have been determined photoelastically and are given in this report. Curves are given showing the distribution ...

    • NASA NPR 9420.1 

      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) provides the financial management, performance requirements and process for budget formulation.
      APPLICABILITY
      This NPR is ...

    • NACA-RM-A52G07 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1952
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: INTRODUCTION
      Increasing attention is being directed to the dynamic characteristics of aircraft. One reason for this is that present0day high flight speeds require correspondingly faster and more precise aircraft control ...

    • NACA-TM-1225 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1949
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: The present report, which forms the first of six articles on experiments with airfoils of aspect ratio from 1 to 3 and various planforms, deals with the three- and six-component measurements made on the trapezoidal wing ...
      Subject(s) : AIRCRAFT , AIRFOILS , ASPECT , DESIGN , PLANFORMS , RATIO , SWEPT , TESTS , TRAPEZOIDAL , TUNNEL , WIND , WING , WINGS ,

    • NASA-LLIS-5199 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2012
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: The requirements development process for the Constellation Program was unnecessarily time-consuming. If the text met the intent of the requirement, it should not be unnecessarily rewritten. For future programs, requirements ...

    • NASA-LLIS-1196 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2002
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Abstract:
      Mars Polar Lander had deficiencies in compliance with the principle of "test-as-you-fly," which requires that ground tests and simulations accurately reflect the planned mission profile, plus ...
      Subject(s) : and Landing (EDL) , Descent , Entry , Environmental Test , Fault Protection , Flight Equipment , Hardware , Independent Verification and Validation , Integration and Test , Launch Process , Payloads , Policy & Planning , Risk Assessment , Risk Management/Assessment , Robust Design , Safety & Mission Assurance , Simulation Accuracy , Software Testing , Spacecraft , Spacecraft Test , Technical Margins , Test & Verification , Test and Evaluation , Test Errors , Test Fidelity , Test Planning ,

    • NASA-TM-X-71763 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;1975
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: A method is presented for interim use in assessing the noise generated by fans and compressors in turbojet and turbofan engines. One-third octave band sound pressure levels consisting of broadband, discrete tone, and ...
      Subject(s) : ENGINE NOISE , NOISE GENERATORS , NOISE INTENSITY , NOISE SPECTRA , PERFORMANCE PREDICTION , PREDICTION ANALYSIS TECHNIQUES , SOUND PRESSURE , TURBOCOMPRESSORS , TURBOFAN ENGINES , TURBOFANS , TURBOJET ENGINES ,

    • NASA-LLIS-0817 

      Type: standard
      Source: NASA - National Aeronautics and Space Administration (NASA):;2000
      Organization : NASA - National Aeronautics and Space Administration (NASA)
      Abstract: Practice:
      Perform acoustic and random vibration testing supplemented with additional sine vibration testing as appropriate to qualify payload hardware to the vibroacoustic environments of the mission, ...