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.
Bearing fatigue life is maximized when the bearing ball or roller hardness is between one and two points greater than that of the bearing race as measured on the Rockwell C scale.
Comparative analysis of two commercial instruments used for measuring hardness of elastomers
Hard limiting of three and four sinusoidal signals
Diurnal variations of hard component of cosmic rays near minimum of solar activity
Critical current density of neodymium-titanium alloy samples is analyzed from magnetization curves to determine the ac properties of hard semiconductive materials. A complete family of magnetization curves is obtained, each curve representing performance at a different temperature.
Soft metal plating of hard metal lip seal enables successful operation of seal in a cryogenic fluid line under high pressure. The seal is coated with a thin film of 24 carat gold on the lip area to provide antigall and seal properties.
Field distribution in hard superconductor with adiabatic field change
Flux jumps in hard superconductor AC and DC MAGNETIC fields
Upper limits to hard X-ray flux from quiet sun analyzed by balloon-borne scintillation detector measuring celestial sources
Contribution to friction coefficient from time correlations between hard and soft molecular interactions evaluated, using linear trajectory approximation
Three dimensional model of monatomic gases interacting with solid surfaces represented by similar, noninteracting hard spheres
Summary of designs, requirements, constraints, and references for Mars hard lander study system
Mission objectives and constraints for Mars hard lander to define out-of-orbit and direct entry reference missions
Mission lander maps for parametric data, entry aeroshell, and parachute subsystem used in Mars hard lander study
Parametric analysis of Mars hard lander and preentry subsystems - computer programs for systems analyses
Design and performance characteristics of Mars hard lander capsule point designs, and criteria and mission constraints for capsules 1 and 2
Analytical design data for capsules 3 and 4 in the Mars hard lander study system
Engineering design of Mars hard lander capsules 5 and 6 and illustrations for increasing payload size