Accession Number : AD0844488

Title :   Electrostatic Space Engines,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH

Personal Author(s) : Sachse, M.

Report Date : 21 DEC 1967

Pagination or Media Count : 13

Abstract : Electrostatic space-flight drives, unlike thermochemical and electromagnetic propulsion systems developing a high thrust with a low starting mass, together with electrothermal and electromagnetic drives belong to a class of propulsion systems with a high starting mass and which develop a low thrust. The specific-impulse ratios of various types of drives are shown. Compared with electrothermal and electromagnetic drives, electrostatic space-flight drives show a most advanced development; this applies particularly to ion-contact- and electron-impulse-ionization pulse sources, the first of which is based on the Langmuir effect and the second on the effect of fast-electron impact. The electrostatic drive can be used for orbital correction, stabilization, and satellite and manned-space-station altitude changes, and for most missions starting from Earth orbit. Since ion exit velocities can easily be varied between 50 and 300 km/sec, ion drives can readily be adapted to very different missions, and under certain conditions can transport greater payloads than thermochemical drives. Their present development is directed toward increasing efficiency and particularly to extending their electrode operating life. (Author)

Descriptors :   (*ELECTRIC ENGINES, SPECIFIC IMPULSE), THRUST, DRIVES, ELECTROSTATICS, EFFICIENCY, EAST GERMANY, SPACE PROPULSION.

Subject Categories : Electric and Ion Propulsion

Distribution Statement : APPROVED FOR PUBLIC RELEASE