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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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Tube diode construction with thoriated tungsten cathode and tubes with barium-system cathodes and with thallium pellets - vapor-filled ceramic thyratons and rectifiers development
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Interplanetary scintillation observations from solar wind inhomogeneities
IR horizon sensor systems for spacecraft attitude determination, detailing field switched edge tracker
Vapor pressure, anode temperature, and inverse emission effects on thallium filled diode tested with barium cathode
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Improving electron optical performance and thermal stability of sterilizable bi-alkali image dissector tubes
Irradiated fuel capsules containing uranium dioxide and uranium carbide
Radar echoes observed from clear atmosphere, discussing scattering mechanisms of thin stable inversions, convective thermals, Benard convection cells, breaking gravity waves, etc
Gyro controlled rigid rotor dynamic stability studied for stoppable rotor operation, developing analytical expressions for determining stability boundary of constant and rotor speed gyros
Electroforming of Al matrix composites by codeposition of short graphite fibers, obtaining increased strength and elastic modulus
X ray spectrometer for space science and laboratory research, presenting Cr K spectrum and fine structure
Performance tests and efficiency measurement of hub-slit-suction stator in single stage compressor
Monograph was published which summarizes and systematically orders large body of successful techniques and practices developed for design of liquid rocket engine turbopump bearings. Document was written to organize and present significant experience and knowledge accumulated by NASA in development and operational programs.
A single-stage compressor with a rotor tip speed of 1600 ft/sec and a 0.5 hub tip ratio was used to investigate the effects of several stator endwall treatment methods on stage range and performance. These endwall treatment methods consisted of stator corner-blow, annular wall suction upstream of stator leading edge, and combined corner-blow and annular wall suction. The overall stage performance with corner blow was essentially the same as the baseline performance. The performance for the annular wall suction and the combined corner-blow and wall suction showed a reduction in peak efficiency of 2.5 percentage points compared to the baseline data.
Over 750 spikes of precipitating electrons with E or = 425 KeV were observed aboard the low altitude polar orbiter OGO-D between 30 July 1967 and 31 December 1967. The spikes may be divided into three distinct populations, depending on whether they occur at latitudes below, at, or above the local limit of trapping.
A scintillation study was conducted with the purpose to define the extent of scintillation activity in the S-band region, and to determine if such activities at higher frequencies are caused by ionospheric irregularities similar to those causing scintillations at vhf and lower frequencies. Simultaneous transmissions at 137 and 1695 MHz from polar orbiting satellites were used in this study. Scintillations were found to be present at S-band frequencies in the polar regions; it is concluded that they are caused by ionospheric characteristics similar to those causing scintillations at lower frequencies.