Aerodynamic characteristics of spherically blunted 45-deg half-angle cones
Pressure, force, and dynamic stability tests on spherically blunted cones, and comparison with calculated aerodynamic coefficients
Passamaneck, R.↗
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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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Effect of hypersonic research engine installation on aerodynamic characteristics of 0.0667-scale model of X-15A-2 airplane at Mach numbers from 1.75 to 4.63
Wind tunnel stability tests to determine effect of hypersonic research engine on aerodynamic characteristics of research aircraft
Graves, E. B.↗
Experimental stability studies of the herringbone-grooved gas-lubricated journal bearing.
Herringbone grooved gas lubricated journal bearing stability, testing effects of geometries and clearances on onset speed for half frequency whirl
Anderson, W. J.↗
Experiments on the stability of water-lubricated three-sector hydrodynamic journal bearings at zero load
Hydrodynamic journal bearing stability tests of three sector bearings
Anderson, W. J.↗
Recursive formulas for the evaluation of certain complex integrals
Recursive formulas for stability tests and quadratic loss functions evaluation for linear discrete time dynamical systems
Astroem, K. J.↗
Experiments on the stability of water lubricated three lobe hydrodynamic journal bearings at zero load
Water-lubricated three-lobe hydrodynamic journal bearing stability tests at zero load with and without axial grooves
Schuller, F. T.↗
Advanced injector concepts investigation Final report
Liquid propellant rocket engine throttling injector design based on exhaust gas counter flow and heat transfer for inflowing propellant vaporization and combustion stability tests
Source record↗
Hypersonic aerodynamic characteristics of a variable-dihedral delta-wing spacecraft configuration
Wind tunnel stability tests of variable dihedral delta wing spacecraft configuration at hypersonic speed
Ellison, J. C.↗
Space shuttle: Static stability and control investigation of the NAR delta wing (134d) and straight wing (130G) space shuttle orbiters
Trisonic wind tunnel static stability tests on straight wing and delta wing space shuttle models
Allen, E. C.↗
Space shuttle: MMC phase A space shuttle modified orbiter: Investigation of stability characteristics and control effectiveness
Trisonic wind tunnel stability tests on space shuttle modified orbiter model
Sarver, D.↗
Space shuttle: Aerodynamic stability and control characteristics of a TBC space shuttle booster and GAC orbiter, M equal 0.6 to 4.96
Wind tunnel stability tests of space shuttle model booster with G3-A orbiter
Johnson, J.↗
Space shuttle: Effect of orbiter incidence angle on the aerodynamic characteristics of the Boeing S-IC booster/ GAC G-11 orbiter launch configuration, M equal .6 to 4.96
Wind tunnel stability tests of space shuttle model at subsonic to hypersonic speeds
Watts, L. L.↗
Room temperature stability and performance of lithium-containing solar cells - An evaluation
Lithium-containing p-n solar cells photovoltaic performance and stability tests at room temperature
Corra, J. P.↗
An exact differential method to determine Liapunov stability
Liapunov function time derivative for autonomous system asymptotic stability tests by exact differential method
Rahman, M. A.↗
The dynamic characteristics of a five component oscillating balance
Frequency response of five component strain gage oscillating balance for dynamic wind tunnel stability testing
Tcheng, P.↗
A 30-cm diameter bombardment thruster with a variable magnetic baffle
Variable magnetic baffles were used to allow a change in baffle geometry to improve thruster performance and stability. Test results are presented. Thruster performance characteristics were analyzed to show how magnetic baffle field strength can improve performance at a fixed beam current, as well as increase the range of ion beam current for throttling.
Bechtel, R. T.↗
Simulation of a flexible spinning vehicle
Results are presented of experimental investigation of the controlled and uncontrolled dynamical behavior of a rotating or artificial gravity space station including flexible body effects. A dynamically scaled model was supported by a spherical air bearing which provided a nearly moment free environment. Reaction jet system were provided for spin-up and spin-down and for damping of wobble motion. Two single-gimbal gyros were arranged as a control moment gyro wobble damping system. Remotely controllable movable masses were provided to simulate mass shift disturbances such as arise from crew motions. An active mass balance wobble damping system which acted to minimize the wobble motions induced by crew motions was also installed. Flexible body effects were provided by a pair of inertia augmentation booms. Inertia augmentation booms are contemplated for use on rotating space stations to cause the spin axis moment of inertia to be the largest of the three moments of inertia as is necessary to assure gyroscopic stability. Test runs were made with each of the control systems with the booms locked (rigid body) and unlocked (flexible body).
Baudry, W. A.↗
A 30-cm diameter bombardment thruster with a variable magnetic baffle.
Thruster performance and stability over a range of beam currents is a function of the hollow cathode propellant flow which depends in part on the baffle geometry. Variable magnetic baffles have been used to allow a change in baffle geometry to improve thruster performance and stability. Test results of a 30-cm thruster with magnetic baffle are presented. Thruster performance characteristics are analyzed to show how the magnetic baffle field strength can improve performance at a fixed beam current, as well as increase the range of ion beam current for throttling.
Bechtel, R. T.↗