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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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In-place calibration of a pressure switch is provided by a system of radially oriented flexing arms which, when rotated at a known velocity, convert the centrifugal force of the arms to a linear force along the shaft. The linear force, when applied to a pressure switch diaphragm, can then be calculated.
Tantalum washers compensate for different thermal coefficients of expansion between stainless steel and an aluminum O-ring. The washers have sufficient thickness to maintain a vacuum seal from room to cryogenic temperatures.
Barium thin film reflection coefficient for ultraviolet radiation in ultrahigh vacuum
Asymptotic solution of thin walled conical shell of revolution under lateral stress
Nuclear-electric power generation system requirements for orbiter and flyby missions using Saturn V multistage booster
Optimal feedback control and bounding hypersurface of allowable perturbations in linear plant regulator, noting multiplier equation
Point matching method calculation of cut-off frequencies and field configurations of waveguides with general cross section
Electrical measurements of stannic oxide in ceramic form, noting forming and firing of samples, dielectric dispersion, grain boundary caracitances, etc
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Servo system senses variations in fusion welding process, and adjusts the control parameters to compensate for them. The system assumes a correlation between uniform weld penetration and temperature gradients near the molten puddle. It senses weld properties and makes adjustments to travel speed and weld current.
Timing circuit delivers relatively long pulses, yet requires no recovery time after turnoff. It can be retriggered before it has timed out and turned off.
Phase composition of alloys of titanium aluminum chromium iron silicon system
Approximate solution for bending of long, narrow anisotropic plate moving in gas at supersonic velocity
Optimum length for traveling magnetic wave plasma accelerator that maximizes kinetic efficiency
Bending tests with plate strip in pure bending and square plate in pure shearing stress, and determination of moduli of elasticity and plate rigidity
Compatible double sideband/single sideband/constant bandwidth FM telemetry system for wideband data
Optical properties of evaporated barium films investigated at various wavelengths, using ultrahigh vacuum reflectometer