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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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On-site evaluation of bonding and grounding of electrical equipment at KSC to minimize hazards from electrical fault, lightning, explosion, and radiation - Vol. 2
Numerical analysis of techniques for separating space shuttles by separation rockets, spring loaded ram, nonignitable gas ejector, or pyrotechnic ram
Lubricant rheology and chemistry effects on contact material fatigue
Development of method of diffusion welding steel butt joints in air without vacuum furnace or hot press
Zoning techniques applied to gray gas and black body radiation transport models including view effects and nonisothermal emission
Contamination control checklists for manufacturing or assembly plants
NASTRAN program for calculating structural vibration characteristics of plate configurations
Sounding rockets aerodynamic heating effects approximate prediction methods using computer programs
SST sonic boom minimization, discussing cross- country flight
Paramagnetic cycles for low temperature superconducting magnet cooling, discussing refrigerator, cryogenic pumps, regenerators and adjustable heat source and sink
Spin stabilized spacecraft inversion by mass translation with momentum vector fixed in inertial space, calculating control mass dynamics
Manual on procedural requirements for performing certain environmental tests on space flight equipment provides information for test equipment designers, quality control and production engineers. Contents of manual are summarized.
Theoretical considerations of lightning phenomena and the effects of the magnetic, capacitive, and resistive components of lightning-induced voltages are discussed. A typical tracking station is analyzed from a lightning standpoint. Specific protective methods are discussed, including the implementation of high-surge-current voltage clippers for sensitive electrical and electronic circuits, grounding, counterpoises, and bonding. The safety of operating personnel is also treated as a prime consideration.
Temperature profiles were measured for agron atmospheric pressure by using absolute line and continuum intensity and were compared with stark width and shift measurements. A detailed analysis of the engineering aspects of setting up for Abel inverting deta photographically is presented. The merits of using photographic detection and of using continuum radiation for temperature profile analysis are discussed. The importance of empirically determining the optical depth is emphasized by discrepancies between measured (two-path) and calculated estimates.
Test requirements and instrumentation are discussed together with a review of general procedures, safety, and maintenance. A term definition listing is included.
The maximum efficiency of silicon solar cells was calculated and yielded a value near 18%. Additionally, the performance of these high efficiency cells in a synchronous orbit radiation field was calculated and it is suggested that these cells would be superior to present silicon cells. The performance of conventional cells was analyzed and several areas in which performance gains may be achieved are discussed. These areas include improvements in diffused region profile, in reduction of excess forward currents in cells made from low resistivity material, and in the theory for describing complex solar cell structures.
The means are discussed by which the the United States Army Board for Aviation Accident Research (USABAAR) now utilizes the vast store of historical accident data in the application of the system safety concept for developmental aircraft. USABAAR serves as the central agency for the Army Accident Prevention Program which includes the receipt, processing, and analysis of all data and information related to Army aircraft accident experience. It is pointed out that methods which served the cause of accident prevention so well in the past are no longer adequate and that traditional parameters used to measure mishap experience have become obsolete. USABAAR has developed, and recently put into use, completely revised accident reporting forms which greatly expand the scope and detail of information provided as a result of investigation. This and other factors which have resulted in an improved data system are discussed in detail.
Experimental data were interpreted using two supersonic combustion computer programs. The P1 program is based on a conventional boundary layer treatment of the mixing of concentric gas streams and complete combustion chemistry. The H1 program is based on a modified boundary layer approach which accounts for radial pressure gradients in the flow and also incorporates a finite rate chemistry calculation. The objective of the investigation was to compare the experimental data with theoretical predictions of the two programs with special emphasis on the prediction of radial pressure gradients by the H1 program. A test of the H1 program was also desired through comparison with the experimental data and with the P1 program.