Results 91 to 100 of about 63,437 (256)
Method of damping nutation motion with minimum spin axis attitude disturbance [PDF]
, 1983 In a method of and apparatus for damping nutation of a spinning spacecraft, spin axis attitude disturbances are substantially reduced by controlling at least one nutation damping gas thruster to fire with nonuniform gas pulses.
Hoffman, H. C.
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Review of Kaufman thruster development at the Lewis Research Center, 1973 [PDF]
Two thruster sizes are studied. One, a small 5-cm or 8-cm size is for spacecraft station keeping. The other, 30-cm (130 mN thrust), is for a thruster array to do primary solar electric propulsion.
Kerslake, W. R.
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Micro-pound extended range thrust stand Patent [PDF]
, 1971 Micro-pound extended range thrust stand for small rocket ...
Stark, K. W.
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Computed voltage distributions around solar electric propulsion spacecraft [PDF]
The NASA Charging Analyzer Program is used to conduct preliminary computations of the voltage distributions around such large spacecraft in geomagnetic substorm environments at geosynchronous altitudes. Both a standard operating voltage (+ or - 150 volts
Stevens, N. J.
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Status of SERT 2 thrusters and spacecraft 1976 [PDF]
The historical record of the SERT II ion thrusters and spacecraft performance for 6 1/2 years since the February 1970 launch is reviewed. The most recent ion thruster operation test shows no changes since 1974.
Kerslake, W. R.
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Development and characterization of the ALFVEN thruster
Journal of Electric PropulsionAbstract The Advanced Linear Field Vector Excitation Network (ALFVEN) thruster represents a novel RF plasma propulsion system developed to enhance the coupling efficiency of electromagnetic waves to plasma, particularly in low-power conditions. This study presents the design, development, and experimental characterization of the ALFVEN- 4050,
Chan, Yung-An +3 more
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Test facility for 6000 hour life test of 30 cm mercury ion thruster [PDF]
The environmental and instrumentation requirements for long term testing of electrical propulsion thrusters which impose severe and unusual requirements upon the simulation facility were studied.
Caldwell, J. J.
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Study of laser heated propulsion devices. Part 2: Assessment of laser propulsion modeling and simulation requirements [PDF]
Theoretical models for the laser heated thruster are reviewed. The requirements for an improved laser heated thruster theoretical model are discussed.
Thoenes, J.
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Sputtering Holes with Ion Beamlets [PDF]
, 1974 Ion beamlets of predetermined configurations are formed by shaped apertures in the screen grid of an ion thruster having a double grid accelerator system. A plate is placed downstream from the screen grid holes and attached to the accelerator grid.
Banks, B. A., Byers, D. C.
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The topics are presented in viewgraph form and include the following: in house program elements; performance measurements; applied-field magnetoplasmadynamic (MPD) thruster performance scaling; MPD thruster technology; thermal efficiency scaling; anode ...
Myers, Roger M.
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