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NASA - National Aeronautics and Space Administration (NASA): Recent submissions
Now showing items 641-660 of 3613
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NASA-LLIS-0710
Abstract: Practice:
Guidance is provided for establishing design and test requirements for the control of electromagnetic emission and susceptibility characteristics of space hardware and payloads. -
NASA-TP-2683
Abstract: An investigation was conducted to define pressure distributions for rectangular cavities over a range of free-stream Mach numbers and cavity dimensions. These pressure distributions together with schlieren photographs are ...Subject(s) : BOUNDARY , CAVITIES , CAVITY , DATA , DISTRIBUTION , EDGES , FLAT , FLOW , FLUID , FREE , LAYER , LAYERS , LEADING , MACH , MODELS , NUMBER , PHOTOGRAPHY , PLATES , PRESSURE , SCHLIEREN , SHEAR , SPEED , SUPERSONIC , TABLES , TURBULENT , -
NASA-LLIS-1781
Abstract: Abstract:
When a 2004 backup tape for a Cassini instrument testbed was needed in late 2005 to restore important files, it was discovered that a coding error in the backup script had been causing the ... -
NASA-LLIS-1502
Abstract: Abstract:
The Orbital Space Plane (OSP) concluded that human ratings requirements required further investigation for implementation. DO NOT under estimate the impact of human rating and crew survival ...Subject(s) : Human Factors , Safety & Mission Assurance , -
NASA-TM-X-72843
Abstract: Wind tunnel tests were conducted to determine the effects of airfoil thickness-ratio on the low speed aerodynamic characteristics of an initial family of airfoils. The results were compared with theoretical predictions ...Subject(s) : AERODYNAMIC , AIRCRAFT , AIRFOILS , AVIATION , CHARACTERISTICS , FLOW , GENERAL , LOW , MACH , NUMBER , RATIO , REYNOLDS , SPEED , TESTS , THICKNESS , TUNNEL , VISCOUS , WIND , -
NASA-LLIS-2896
Abstract: Abstract:
On the Space Shuttle launch tower, the swing arms that raise the gaseous oxygen (GOX) vent hood incorporate a jackscrew assembly. An addition to a commercial off-the-shelf (COTS) jackscrew ...Subject(s) : Administration/Organization , Entry Systems , Ground Equipment , Ground Operations , Ground support systems , Hardware , Launch support systems , Lifting Devices , Logistics and maintenance , Long term sustainability and maintenance planning , Maintenance , Reliability , -
NASA-CR-2200
Abstract: A new method of extracting aircraft stability and control derivatives from flight test data is developed based on the maximum likelihood cirterion. It is shown that this new method is capable of processing data from both ...Subject(s) : AERODYNAMIC CONFIGURATIONS , AIRCRAFT CONTROL , AIRCRAFT PERFORMANCE , DATA PROCESSING , FLIGHT CHARACTERISTICS , FLIGHT TESTS , MAXIMUM LIKELIHOOD ESTIMATES , STABILITY DERIVATIVES , -
NASA NPD 1660.1 REV B
Abstract: APPLICABILITY
This NPD is applicable to all NASA Federal employees, programs, projects, operations, and other activities conducted by or for NASA Headquarters (HQ) and NASA Centers, including Component ... -
NASA-LLIS-0488
Abstract: Description of Driving Event:
Technicians were performing a maintenance operation on a Mazak CNC milling machine vacuum pump when a glass oil mist separator bowl burst. The subject bowl was attached ...Subject(s) : Hardware , Industrial Operations , -
NASA-LLIS-0260
Abstract: Description of Driving Event:
Possible residue build-up in stainless steel tubing, as obtained from the supplier, could cause a blockage in the line. All stainless steel tubing should be inspected for ...Subject(s) : Flight Equipment , Ground Equipment , Industrial Operations , Parts Materials & Processes , -
NASA-TP-1043
Abstract: The maximum likelihood parameter estimation technique was used to extract values of stability and control derivatives from flight test data obtained from a light, single-engine, low-wing airplane. The flight tests consisted ...Subject(s) : AERODYNAMIC , AIRCRAFT , COMPUTER , CONTROLLABILITY , DERIVATION , ESTIMATES , ESTIMATING , FLIGHT , INPUT , LIGHT , LIKELIHOOD , MAXIMUM , OUTPUT , PARAMETERIZATION , PROGRAMMING , ROUTINES , STABILITY , TESTS , -
NASA-LLIS-1300
Abstract: Abstract:
A 500-volt insulation/isolation resistance test intended for the propellant line heaters and tank heaters was mistakenly applied to all electrical connections in the Space Infrared Telescope ...Subject(s) : excess voltage , Flight Equipment , Ground Equipment , Hardware , over voltage , Spacecraft , Test & Verification , Test Article , test error , Test Facility , test induced failure , voltage rating , -
NACA-RM-L54C16
Abstract: The present investigation was made at a free-stream Mach number of 1.59 to compare the afterbody drags to a series of conical boattailed models at zero angle of attack. Afterbody drags were obtained for both the power-off ...Subject(s) : AERODYNAMIC , ANGLE , ANGLES , ATTACK , BASE , BOATTAILS , BODIES , CONICAL , DISTRIBUTION , DRAG , EXHAUST , FLOW , FREE , GEOMETRY , INTERFERENCE , JET , LIFT , MACH , NOZZLES , NUMBER , PRESSURE , RATIO , REVOLUTION , ZERO , -
NACA-TN-1637
Abstract: An investigation using a cylinder of a V-type liquid-cooled engine was conducted to observe the behavior of the cylinder when operated under preignition conditions. The effects of the following variables were investigated: ... -
NACA-TR-D-1053
Abstract: A detailed exploration of the field of mean and fluctuating quantities in a two-dimensional turbulent channel flow is presented. The measurements were repeated at three Reynolds numbers, 12,300, 30,800, and 61,600, based ...Subject(s) : CHANNEL FLOW , COMPUTATIONAL FLUID DYNAMICS , ENERGY TRANSFER , SHEAR STRESS , TURBULENT FLOW , TWO DIMENSIONAL FLOW , UNSTEADY FLOW , VELOCITY DISTRIBUTION , WALL FLOW , -
NASA-LLIS-0018
Abstract: Description of Driving Event:
The shuttle orbiter right hand inboard brake failed during the STS-7 landing, even though there was very little braking action. A post-flight tear down and evaluation of ...Subject(s) : Aircraft , Flight Equipment , Flight Operations , Hardware , Launch Vehicle , Parts Materials & Processes , -
NASA-TN-D-960
Abstract: A series of fatigue tests with specimens subjected to constant amplitude and two-step axial loads were conducted on 12-inch-wide sheet specimens of 2024-T3 and 7075-T6 aluminum alloy to study the effects of a change in ...Subject(s) : ALUMINUM ALLOYS , AXIAL LOADS , CRACK INITIATION , CRACK PROPAGATION , FATIGUE TESTS , PERFORMANCE TESTS , STRESS ANALYSIS , STRESS PROPAGATION , -
NASA-LLIS-0327
Abstract: Description of Driving Event:
The propellant fire on November 27, 1982 at the Arnold Engineering Development Center, Tullahoma, Tennessee was a result of cutting propellants on the floor of a vertical ...Subject(s) : Energetic Materials - Explosive/Propellant/Pyrotechnic , Explosives Handling , Hazardous/Toxic Waste/Materials , Industrial Operations , Safety & Mission Assurance , -
NASA-LLIS-4618
Abstract: A major problem in designing a cryogenic system in a spacecraft or launch vehicle is avoiding back-pressure buildup, which will affect the ability to service and deservice the vehicle with cryogenic reactants. Servicing ...Subject(s) : Acquisition / procurement strategy and planning , Crew Operations , Crew operations and support concepts , Cryogenic Systems , Engineering design and project processes and standards , Launch Vehicle , Level II/III requirements definition , Long term sustainability and maintenance planning , Mission and systems trade studies , Orbiting Vehicles , Pressure Vessels , Spacecraft , Systems analysis - cost analysis , -
NASA-LLIS-1061
Abstract: Description of Driving Event:
Maintenance of Software Development Tools.Subject(s) : Aerospace Safety Advisory Panel , Information Technology/Systems , Policy & Planning , Research & Development , Risk Management/Assessment , Safety & Mission Assurance , Software , Spacecraft , Test & Verification ,