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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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Pressure valve has a moving annular ring seal that automatically reacts to differential pressure changes across the seat. This valve has good potential for the petroleum and chemical industries.
Ring counter dissipates very low power in standby conditions, yet drives high-current loads on a low duty-factor basis. Complementary transistors are used so that in one selected stage both transistors are conducting while the transistors of the other stage are cut off.
Slip ring lead wires composed of ternary alloys of silver, have high electrical conductivity, a tensile strength of at least 30,000 psi, high ductility, and are solderable and weldable. An unexpected advantage of these alloys is their resistance to discoloration on heating in air.
Buckling and postbuckling tests of ring-stiffened circular cylinders loaded to failure by uniform external air pressure
Analysis of nonlinear flexural vibrations of thin circular rings, and application of Galerkin method on motion equations
Determining general instability load of ring stiffened corrugated cylinder under axial compression by linear small deflection theory
High subsonic wind tunnel study of stability and control characteristics of antitank missile with ram-pressure jet controls on ring tail
Longitudinal vibration of ring stiffened cylindrical shells containing liquids for application to liquid fueled space vehicle boosters
Evaluation of flexible and rigid ring baffles for liquid slosh suppression
Small plasma probes with guard rings and thermocouples
Buckling test of ring-stiffened cylinder subjected to hydrostatic pressure
Ring beam wheel surface wave search unit for inspection of welds and material surface defects
Design and processing development, and tooling and fabrication plan for S-IC fuel tank Y-ring segment
Survey of Miles method for determination of damping by ring baffles in cylindrical tanks
Bending tests of aluminum-alloy corrugated cylinders with eccentric ring stiffeners
Structural optimization of axially compressed cylinders stiffened externally with rings and/or stringers, noting effect of wall thickness on structural weight
Gamma-level ring-core magnetometer sensitivity parameters, noting frequency, dynamic differential permeability, number of pickup turns, etc
Nondimensional theoretical and experimental pressures and forces acting on flat ring baffle under sloshing conditions