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NASA - National Aeronautics and Space Administration (NASA): Recent submissions
Now showing items 2501-2520 of 3613
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NASA-LLIS-0172
Abstract: Description of Driving Event:
Pilot actuated extend supply and return valves can be reset to the closed position while the access arm is being extended. This could damage the OAA and possibly prevent ...Subject(s) : Facilities , Ground Equipment , Ground Operations , Launch Process , Risk Management/Assessment , -
NASA-LLIS-5201
Abstract: As the Constellation Program evolved, the allocation of requirements for ground processing subsystems became very cumbersome. Because the allocation involved many tiers of responsible organizations, it created redundant ... -
NASA-LLIS-1195
Abstract: Abstract:
Due to tight funding constraint, both the Mars Polar Lander and Deep Space 1 projects were staffed by lean teams operating with ambitious schedules. For the unsuccessful MPL, many key technical ...Subject(s) : Flight Equipment , Flight Operations , Ground Equipment , Ground Operations , Hardware , Human Factors , Human Resources & Education , management and planning , Occupational Health , Policy & Planning , programmatic constraints , project management , risk assessment , Safety & Mission Assurance , Spacecraft , technical oversight , Test & Verification , workload , -
NASA-LLIS-0815
Abstract: Practice:
The determination of accurate spacecraft loads via coupled flight loads analysis is used throughout the entire spacecraft development cycle, from conceptual design to final verification loads ... -
NACA-TN-1347
Abstract: A theoretic solution is presented for the buckling stresses of long plates with transverse curvature loaded in shear and longitudinal direct stress. The theoretical critical-stress combinations for plates having either ...Subject(s) : CURVED , CURVED PLATES - STRESSES , LOADS - PLATES , PLATES - BUCKLING , PLATES - COMPRESSION , SHEARING , STRESSED SKIN - PLATES , THEORIES - TORSION & BENDING - DONNELL , -
NASA-LLIS-0024
Abstract: Description of Driving Event:
The hydraset control console is a self-contained system for the storage, metering, and regulation of compressible GN2. The pneumatic system delivers pressurized GN2 to the ...Subject(s) : Facilities , Ground Equipment , Hardware , Pressure Vessels , -
NACA-TR-723
Abstract: Report presents the results of an investigation conducted in the NACA 7 by 10-foot win tunnel to determine the effect of the deflection of main and auxiliary slotted flaps on the aerodynamic section characteristics of ...Subject(s) : AERODYNAMIC , AIRFOIL , AIRFOILS , ANGLE , ATTACK , CHARACTERISTICS , CHORDS , COEFFICIENTS , DRAG , FLAPS , GEOMETRY , LIFT , MOMENTS , PITCHING , PROFILES , SLOTS , TESTS , THICKNESS , TUNNEL , WIND , WING , -
NASA-LLIS-0957
Abstract: Description of Driving Event:
The Challenger (Space Shuttle Flight #51L) accident triggered a detailed review of all of the joints in the Solid Rocket Motor. Analyses showed a potential weakness and ...Subject(s) : Energetic Materials - Explosive/Propellant/Pyrotechnic , Launch Vehicle , -
NASA-LLIS-0572
Abstract: Abstract:
Premature depletion of one propellant can occur in bipropellant systems if engine and component acceptance test data are not properly considered when determining the flight propellant loads. ...Subject(s) : Engine Flow Test Data , -
NASA-LLIS-4236
Abstract: Abstract:
During weekend work conducted February 3 and 4, 2007, contract workers removed the existing B1201 roof material, which uncovered an old drain (drain 1). This drain 1 had been abandoned in ...Subject(s) : Acquisition / procurement strategy and planning , Communications between different offices and contractor personnel , Contractor relationships , Facilities , Ground processing and manifesting , International partner coordination , Maintenance , Review systems and boards , -
NASA-TM-4209
Abstract: An experimental investigation was conducted to expand the data base and knowledge of flow fields in cavities over the subsonic and transonic speed regimes. A rectangular, 3-D cavity was tested over a Mach number range from ...Subject(s) : BOUNDARY , CAVITATION , CAVITY , DIMENSIONAL , DISTRIBUTION , EFFECTS , FLOW , FREE , LAYER , MACH , NUMBER , PRESSURE , REYNOLDS , SPEED , STATIC , SUBSONIC , THREE , TRANSONIC , TURBULENCE , -
NASA-LLIS-0395
Abstract: Abstract:
Before the first Mercury encounter, the MVM'73 high gain antenna suddenly lost 3 dB in gain and changed from circular to linear in polarization. It was suspected that either particles or chips ...Subject(s) : Administration/Organization , Operations , Spacecraft , -
NACA-RM-L56G12
Abstract: INTRODUCTION
A previous investigation conducted in the Langley 8-foot transonic tunnel (ref. 1) to evaluate some of the effects of a sonic propulsive jet as influenced by changes in afterbody geometry indicated the ... -
NASA-LLIS-1210
Abstract: Description of Driving Event:
During the performance of closed hatch environmental control / life support system (ECLSS) test, Boeing Engineering authorized a deviation to the pre-approved hazardous ...Subject(s) : Configuration Management , Facilities , Flight Operations , Ground Operations , Independent Verification and Validation , Industrial Operations , Launch Process , Parts Materials & Processes , Policy & Planning , Risk Management/Assessment , Safety & Mission Assurance , Test & Verification , Test Article , Test Facility , -
NASA-LLIS-4019
Abstract: Abstract:
When procuring the elevators at the Kennedy Space Center (KSC) to be installed at the Operations Support Building (OSB) I, proprietary elevators were acquired when they were not needed, because ...Subject(s) : Acquisition / procurement strategy and planning , Engineering design and project processes and standards , Ground support systems , Logistics and maintenance , Long term sustainability and maintenance planning , Requirements critical to costing and cost credibility , Systems analysis - cost analysis , -
NASA-LLIS-0787
Abstract: Practice:
Impose an acoustic noise requirement on spacecraft hardware design to ensure the structural integrity of the vehicle and its components in the vibroacoustic launch environment. Acoustic noise ... -
NASA-LLIS-0177
Abstract: Description of Driving Event:
The o-ring used in the SRM case joint is critical to the sealing of the joint, yet is not designated as a critical process. The adequacy of o-ring processing and quality ...Subject(s) : Flight Equipment , Industrial Operations , Risk Management/Assessment , -
NASA-LLIS-3676
Abstract: Description of Driving Event:
Early in the Space Shuttle Program's Orbiter ground turnaround processing, RF system testing was performed for every flow in the Orbiter Processing Facility (OPF). During ...Subject(s) : Accident Investigation , Configuration Change Control , Crew Operations , Crew operations and support concepts , Crew Survival Systems , Engineering design and project processes and standards , Entry Systems , Extra-Vehicular Activity/Mobility/Space Suits , Ground processing and manifesting , Human Health/Flight Medicine , Impact of human factors on systems requirements and designs , Lander Systems , Launch support systems , Launch Systems , Level II/III requirements definition , -
NASA-LLIS-1165
Abstract: Description of Driving Event:
Portable Computer System (PCS) Software is Not Developed Concurrently With Primary International Space Station (ISS) Flight Software Leading to Inadequate Multiple Element ...Subject(s) : Aerospace Safety Advisory Panel , Configuration Management , Information Technology/Systems , Policy & Planning , Risk Management/Assessment , Software , Test & Verification , -
NASA-TN-D-4856
Abstract: Aerodynamic characteristics of COIN aircraft model with boundary layer control on inverted V-tailSubject(s) : AERODYNAMIC , AIRCRAFT , ANGLE , ASSEMBLIES , ATTACK , BOUNDARY , CHARACTERISTICS , COEFFICIENTS , COIN , CONTROL , FLAPS , LAYER , LIFT , SLIPSTREAMS , STABILITY , SURFACES , TAIL , TESTS , TUNNEL , WIND ,