Resistojet rocket

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A resistojet is a method of spacecraft propulsion (electric propulsion) that provides thrust by heating a (typically non-reactive) fluid. Heating is usually achieved by sending electricity through a resistor consisting of a hot incandescent filament, with the expanded gas expelled through a conventional nozzle.[1]

Resistojets have been flown in space since 1965 on board military Vela satellites, however they became used in commercial applications in 1980 with launch of first satellites in the INTELSAT-V program. Nowadays resistojet propulsion is used for orbit insertion, attitude control, and deorbit of LEO satellites, including satellites in the Iridium satellite constellation[1] and do well in situations where energy is much more plentiful than mass, and where propulsion efficiency needs to be reasonably high but low thrust is acceptable.[citation needed]

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