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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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Centrifugal separator suspended in the fuel tank of a space vehicle selects and vents gas vapor at zero gravity. Escaping vapor is used to drive an expander turbine that is magnetically coupled to the separator.
Sensing circuit in which a tunnel diode controls a series regulator transistor protects a low voltage transistorized dc regulator from damage by excessive load currents. When a fault occurs, the faulty circuit is limited to a preset percentage of the current when limiting first occurs.
Three orthogonal-plane projection provides accuracy of readout of both attitude and attitude-rate information in an easily interpreted, uncluttered arrangement where blind navigation of a moving body is involved. The longitudinal length of the projection is constant, and independent of the pitch and roll attitudes of the moving body.
Electrically propelled earth-moon shuttle vehicles for logistic support of advanced lunar operations
Development of auxiliary electric power generation system for hydrogen-oxygen spacecraft - redesign of oxygen injector and first stage cylinder head
Engineering design of auxiliary electrical power generation system operating on hydrogen and oxygen in space environment
Electrically propelled cargo spacecraft for sustained lunar logistics support
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Multiphase wave generator uses multivibrators in a feedback control mode that produces output signal pairs that are impressed on the primary windings of inverter transformers sequentially with a 120 degree phase shift from each other.
Design of high frequency dc-dc converter modules for power conditioning subsystems, and control system for operating ion engines in space environment
High speed klystron cathode pulser requires low voltage to generate high-voltage pulses. Broadband video transformers are wound in two configurations - /1/ transmission line, multifilar toroids and /2/ loop coupling toroids. The circuit adapts to generate high-speed, high-voltage, high-stability power pulses at megawatt levels.
Electrolytic water sterilizer controls microbial contamination in manned spacecraft. Individual sterilizer cells are self-contained and require no external power or control. The sterilizer generates silver ions which do not impart an unpleasant taste to water.
Annotated bibliography on batteries, fuel cells, thermionics, thermoelectrics, nuclear energy sources, and other direct energy conversion concepts adaptable to space vehicles
Development of failure sensing switching circuitry for electrical power system reliability during extended space missions
Solar cell powered remote controlled brain telestimulator mountable on head of primates
Scanning microscope uses a field-emission tip for the electron source, an electron gun that simultaneously accelerates and focuses electrons from the source, and one auxiliary lens to produce a final probe size at the specimen on the order of angstroms.
Solar power conversion subsystems with load capability range from 200 to 500 W considered for advanced Nimbus missions
Computer programs for simulation using digital system