SEARCH · Engineering Papers
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.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Approximate and characteristics methods to predict effect of gas composition on forces and static stability of planetary entry configurations in air and assumed Martian atmospheres
Manned Orbital Research Laboratory /MORL/ CONFIGURATION, design, installation and maintenance
Liquid hydrogen stratification test data for large cylindrical tank of Saturn configuration, using hyperbolic temperature profile and boundary layer considerations in analysis
A study has been made of a flare-cylinder configuration to investigate its feasibility as a reentry body of an intermediate range ballistic missile. Factors considered were heating, weight, stability, and impact velocity. A series of trajectories covering the possible range of weight-drag ratios were computed for simple truncated nose shapes of varying pointedness, and hence varying weight-drag ratios. Four trajectories were chosen for detailed temperature computation from among those trajectories estimated to be possible. Temperature calculations were made for both "conventional" (for example, copper, Inconel, and stainless steel) and "unconventional" (for example, beryllium and graphite) materials. Results of the computations showed that an impact Mach number of 0.5 was readily obtainable for a body constructed from conventional materials. A substantial increase in subsonic impact velocity above a Mach number of 0.5 was possible without exceeding material temperature limits. A weight saving of up to 134 pounds out of 822 was possible with unconventional materials. This saving represents 78 percent of the structural weight. Supersonic impact would require construction of the body from unconventional materials but appeared to be well within the range of attainability.
Copper alloy is converted into a spring material that can be rolled into a compact coil which will spontaneously open to form a tube in the long direction of the strip. The copper alloy is passed through a furnace at a prescribed temperature while restraining the strip in the desired tubular configuration.
Compact back-to-back trapezoidal tooth log-periodic /TTLP/ antenna with frequency-independent characteristics is formed by reducing the angle between the two elements of a basic TTLP to zero. The back-to-back antenna, arranged in various configurations, provides monopulse operations in one or two planes and in various polarizations.
Optical monitor panel projects a chosen panel configuration upon a translucent screen by using a master projector and appropriate slide to project panel board nomenclature and a series of smaller individual projectors to superimpose monitor indicators upon the projected panel board.
Plated wire memory word drive line allows high storage density, good plated wire transmission and a simplified memory plane configuration. A half-turn word drive line with a magnetic keeper is used. The ground plane provides the return path for both the word current and the plated wire transmission line.
Analysis of unsteady incompressible flow out of different tank configurations to determine flow rates and position of liquid levels - fluid mechanics
Satellite electric power system configurations for maximum utilization of power - systems analysis
Proton irradiation effects on electric properties and defect configurations of bismuth telluride
Root mean square fluctuating buffet pressures for Mercury/Atlas and Apollo/Saturn configurations correlated with Mach number, angle of attack, and streamwise location
Comparative tensile and fatigue properties of welded Centaur stainless steel tank joint configurations at room and liquid hydrogen temperatures
Aerodynamic damping and oscillatory stability in pitch and yaw of Gemini abort and reentry configurations at transonic and supersonic speeds
Geometric modifications effect on lift-drag ratios of wing body configurations at hypersonic speeds
Longitudinal aerodynamic characteristics of blunted cone reentry vehicle configurations at high Mach numbers, including Reynolds number effect
Satellite power system configurations for maximum utilization of power
Aerodynamic characteristics in pitch of variable sweep V/STOL configurations tested in supersonic wind tunnel