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.
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This paper is concerned with a review of available energy absorbing materials and devices, and the results of an example evaluation of specific techniques applied to a vertical landing system. Many of the energy absorbers discussed have been investigated by Northrop Ventura for use in lunar as well as earth landing systems.
Ultrasonic pulse study of lithium fluoride
Ultrasonic pulse-echo technique to measure absorption in superconducting lead
Hypothalamic stimulation of rats suffering from foot shocks
Impact acceleration and landing system characteristics of Apollo spacecraft command module configurations with deployed heat shield
Point matching method calculation of cut-off frequencies and field configurations of waveguides with general cross section
Transistor biased amplifier has a biased diode discriminator driven by a high impedance /several megohms/ current source, rather than a voltage source with several hundred ohms output impedance. This high impedance input arrangement makes the incremental impedance of the threshold diode negligible relative to the input impedance.
Amplifier translates the square pulses generated by a boron-trifluoride neutron sensitive detector located adjacent to a nuclear reactor to slower, long exponential decay pulses. These pulses are transmitted over long coaxial cables with minimum distortion and loss of frequency.
Rocket nozzle effect on acoustic losses from model motor chambers oscillating in first longitudinal mode
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KAP-5 computer program for design and analysis of radiation shields in nuclear rocket systems
Computed spherical oscillation tables for earth models
Elastic behavior of canine aortae subjected to small sinusoidal pressure signals
Pulse method for rapid determination of internal friction and dynamic modulus of materials
Xenon photoattenuation cross sections indicating disobedience of Beer law, pressure and temperature effects and heat of dissociation value
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Silver conductive lacquers in microwave region
Love wave amplitude data satisfying earth model with intrinsic internal friction at depths assumed due to single thermally activated relaxation