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NASA - National Aeronautics and Space Administration (NASA): Recent submissions
Now showing items 121-140 of 3613
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NACA-TN-2323
Abstract: The general characteristics of the flow field in a submerged air inlet are investigated by theoretical, wind-tunnel, and visual-flow studies.
Equations are developed for calculating the laminar and turbulent boundary-layer ...Subject(s) : AERODYNAMIC , AIR , BODIES , BOUNDARY , COMPRESSIBILITY , DISTRIBUTION , DRAG , FLOW , INTAKE , LAMINAR , LAYER , LOW , MASS , SPEED , SUBMERGED , SYSTEMS , TESTS , TUNNEL , TURBULENT , VISUALIZATION , VORTICES , WIND , -
NACA-RM-L57B21
Abstract: INTRODUCTION
Present-day jet-propelled aircraft capable of supersonic flight cruises at high subsonic speeds in order to achieve a significant operating range. Since afterburner operation is not required for the cruise ... -
NASA-LLIS-0153
Abstract: Description of Driving Event:
The -1 and -2 hypergol spill aspirators vent into the atmosphere when used. These were KSC's first portable models and are now identified to operate only at unconfined ...Subject(s) : Ground Equipment , Ground Operations , Hazardous/Toxic Waste/Materials , Risk Management/Assessment , -
NASA-LLIS-1176
Abstract: Description of Driving Event:
Implementation of Software Standards and Processes for Building, Testing, and Verifying Software at NASA.Subject(s) : Administration/Organization , Aerospace Safety Advisory Panel , Computers , Configuration Management , Independent Verification and Validation , Information Technology/Systems , Policy & Planning , Risk Management/Assessment , Software , Test & Verification , -
NACA-TN-1526
Abstract: A small-deflection theory is developed for the elastic behavior of orthotropic flat plates in which deflections due to shear are taken into account. In this theory, which covers all types of flat sandwich construction, a ...Subject(s) : BUCKLING , CONSTRUCTION , DIFFERENTIAL , EQUATIONS , FLAT , LOADS , PLATES , SANDWICH , SHEAR , STRESSES , THEORIES , -
NASA-LLIS-1551
Abstract: Abstract:
The original AATT acquisition strategy identified a rough 70/30 % funding split between procurement and in-house dollars spent. Research and technical support organizations were allowed to ...Subject(s) : Human Resources & Education , Program and Project Management , Risk Management/Assessment , -
NASA-LLIS-0793
Abstract: Practice:
Reliable design of spacecraft radios requires the analysis and test of hardware responses to spurious emissions which may degrade communications performance. Prior to hardware integration on ... -
NACA-TR-938
Abstract: A summary has been made of available data on the characteristics of airfoil sections with trailing-edge high-lift devices. Data for plain, split, and slotted flaps are collected and analyzed. The effects of each of the ... -
NASA-LLIS-0002
Abstract: Description of Driving Event:
Following the shuttle mission STS-34, it was determined that a vent door actuator operated on two of the three electrical phases. The vent door actuator was replaced. ...Subject(s) : Flight Operations , Hardware , Human Resources & Education , Parts Materials & Processes , -
NASA-LLIS-0937
Abstract: Description of Driving Event:
A three-man crane operating crew was assisting a three-man crane overhaul crew to refurbish a 140Ton crew and to refurbish a 110-ton government owned mobile crane on ...Subject(s) : Ground Operations , Lifting Devices , Packaging Handling Storage , Safety & Mission Assurance , -
NASA NPR 8570.1
Abstract: Purpose
In support and promotion of NASA's Strategic Plan, NASA's Strategy for Environmental Excellence in the Twenty-First Century, and NASA Policy Directive (NPD) 8500.1, "NASA Environmental Management," ... -
NACA-TN-4050
Abstract: Some discussion of the acoustic fatigue problem of aircraft structures is given along with data pertaining to the acoustic inputs from some power plants common use. Comparisons are given for results of some fatigue tests ... -
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NASA-LLIS-0534
Abstract: Description of Driving Event:
Space Station Oxygen quick disconnects (QD's) used silicon grease in the flow path of moderate to high pressure oxygen. The auto ignition temperature for this grease is ...Subject(s) : Parts Materials & Processes , -
NASA-LLIS-1618
Abstract: Abstract:
During Mars Exploration Rover (MER) system integration and test, it was discovered that two Rover Electronics Module (REM) heater circuits were miswired during fabrication. In addition to the ...Subject(s) : design-for-test , Flight Equipment , Hardware , Manufacturing/ Engineering , Payloads , Spacecraft , Test & Verification , Test Article , test-induced failure , -
NACA-TR-892
Abstract: A method is derived for calculating the damping coefficients in pitch and roll for a series of triangular wings and a restricted series of sweptback wings at supersonic speeds. The elementary "supersonic source" solution ...Subject(s) : COMPUTATIONAL , DAMPING , DELTA , DERIVATIVES , DISTRIBUTION , DYNAMICS , EQUATIONS , FLOW , FLUID , INCLINATION , LINEAR , MOTION , PITCH , PRESSURE , ROLL , STABILITY , SUCTION , SUPERSONIC , SWEPTBACK , WINGS , -
NASA-LLIS-0965
Abstract: Description of Driving Event:
In the SSME, a small recirculation flow is maintained by flowing the propellant through a bleed valve located at the main fuel valve to an overboard dump line or pumped ...Subject(s) : Configuration Management , Cryogenic Systems , Ground Equipment , Hardware , Launch Vehicle , Parts Materials & Processes , Safety & Mission Assurance , Spacecraft , Test Article , Test Facility , -
NASA-LLIS-2796
Abstract: Abstract:
Configuration procedures for Launch Processing System (LPS) systems were not specifically designed to verify that all systems and end items are ready to support Operations. Over time many ...Subject(s) : Computers , Configuration control and data management , Configuration Management , Engineering design and project processes and standards , Ground Operations , Ground support systems , Hardware , Information Technology/Systems , Launch support systems , Launch Systems , Software , -
NACA-TN-3911
Abstract: A method is presented for estimating the lift due to flap deflection at low angles of attack in incompressible flow. In this method provision is made for the use of incremental section-lift data for estimating the effectiveness ...Subject(s) : ASPECT , COMPLETE , CONTROL , EDGE , EFFECTS , FAPS , FLAP , MACH , NUMBER , RATIO , SWEEP , TAPER , THEORY , TRIALING , TWIST , TYPE , WINGS , -
NASA-STD-4003 REV A
Abstract: Purpose
The purpose of this Standard is to define the basic electrical bonding requirements for NASA launch vehicles, spacecraft, payloads, and equipment. Its intent is to provide fundamental aerospace ...