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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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Subsonic and supersonic aerodynamic characteristics of aircraft configuration using double pivot variable sweep wings
Conical pivot bearing analysis and minimal torque design criteria for aerospace applications
Wing pivot location effect on longitudinal aerodynamic characteristics of variable sweep wing having M planform
Seal concepts evaluation for compressor end seals, stator interchange seals, and stator pivot seals in air breathing propulsion system
Design of compressor end, stator interface, and stator pivot seals for advanced air breathing engines
Pivoted pad gas bearing performance in exploratory operation of Brayton cycle turbocompressor
Theoretical study of effect of pivot location on aerodynamic balance movement of variable sweep wings in incompressible flow
Development of compressor, stator, and vane pivot seals for use in advanced air breathing engines
Pivoted pad journal gas bearing performance from experimental study of Brayton cycle turbocompressor designed for space power system
Design and fabrication of flexible pivots for aerospace structures
Flexible steel pivot mount, suspended by flat vertical beryllium copper springs, is capable of rotation, free of hysteresis and starting friction. Mount requires no lubrication, is made in varying sizes, and is driven with either dc torque motor or mechanical linkage.
Fretting damage in gas bearing tilting pad pivots
Effects of mount stiffness and damping on dynamic behavior of air lubricated pivoted-pad journal bearing-rotor system - Vol. 1
Flight characteristics and handling qualities of high L/D concept with single pivot two position skewed wing spacecraft
Pivotal shock absorbing assembly for use as load distributing portion in landing gear systems of space vehicles
Performance tests of compressor seals and stator pivot seals used with air breathing propulsion systems - Part 2
A test program was conducted to determine the performance characteristics of gas-lubricated nonconforming pivoted-pad journal bearings and a spiral-groove thrust bearing designed for the Brayton cycle rotating unit (BRU). Hydrostatic, hybrid (simultaneously hydrostatic and hydrodynamic), and hydrodynamic tests were conducted in argon gas at ambient pressure and temperature ranges representative of hydrostatic operation up to the 10.5-kWe BRU power-generating level. Performance of the gas lubricated bearings is presented, including hydrostatic gas flow rates, bearing clearances, bearing temperatures, and transient performance.
A pivoting traversing boundary layer probe was evaluated in flight on an F-104 airplane. The evaluation was performed at free stream Mach numbers from 0.8 to 2.0. The unit is described, and operating problems and their solutions are discussed. Conventional boundary layer profiles containing variations in flow angle within the viscous layer are shown for free stream Mach numbers of 0.8, 1.6, and 2.0. Although the unit was not optimized for size and weight, it successfully measured simultaneously flow angularity, probe height, and pitot pressure through the boundary layer.