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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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A systematic method has been developed for minimizing spherical shield weights for protection against proton radiation, including secondary neutron production, subject to various specified dose constraints. Variational methods are applied to a radiation model yielding the choice of optimum shielding materials and their mixtures, together with a prescription for their disposition in a multilayer spherical shield.
The design, construction and laboratory testing of a satellite tracking system are described. The tracking mechanism employs a low power, lightweight flight transmitter in conjunction with a receiving system of advanced design. The flight transmitter will radiate 3 mw for three months and will provide two narrow hand telemetering channels in a unit having a total weight of 2 lb. The ground receiving equipment is capable of acquiring and tracking the beacon signal at a line-of-sight distance of 3000 miles and at any azimuth and elevation angle. Interferometer antennas could he used to determine the angular position of the satellite with an accuracy of one milliradian, which is equivalent to approximately ±0.04 sec in the determination of the period.
Design technique evaluates optimum weight of space radiator consisting of finned, right circular cylinder.
IBM-F04 Fortran program to design minimum weight fuel cell power systems for space vehicles
Payload weight and length effect on mass and aerodynamic characteristics of Apache and Cajun sounding rockets
Minimum weight design of symmetrically stiffened orthotropic cylinders under axial compression
High energy density lithium-anode primary cells developed with energy-to-weight ratios over 200 watt hours per pound
Limits of head wave amplitudes for short spreads from charges, blasting caps, and 45-kilogram weight drops
Weight reductions in Saturn V thrust structure by using lightweight high strength beryllium blind and semi-blind fasteners
Error analysis of weighted least squares method to determine lunar gravitational field
General theory to prove existence of class of two weight codes
Theorem to characterize class of cyclic codes with three non-zero weights
Rotor blade modifications for high weight flow, low pressure ratio turbine
Performance characteristics of high-weight flow, low pressure ratio, single stage turbine rotor and stator blades
Time-weighted minimal energy control of nth order plant
Low molecular weight polymer flow behavior variation with shear rate, shear stress and temperature
Dead weight testing device uses a common force plane piston manometer to set accurate gage pressure in pounds per square inch. An additional piston gage easily adapts the device for absolute pressure calibration.
Survey on minimum weight design aspects of stiffened cylinders under compression