Electric/LH2

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Electric/LH2

Electric/LH2 propellant. Liquid hydrogen used as the propellant in an electric arcjet or resistojet motor, where it is heated rather than ionized. The power source can be a nuclear reactor, thermal-electric generator, or solar panels. Liquid hydrogen had big drawbacks, however - it was highly cryogenic, and it had a very low density, making for large tanks, and making long-term storage difficult. Its use in electric engines, which by definition were low-thrust and long-duration, meant that no electric engines reached the operational stage using this propellant.

Subtopics

End Hall Thruster UM-NASA electric/LH2 rocket engine. 1 kW arc jet, ran on H2, N2, or a mixture, at about 12A, 1 kW, peak around 600s Isp, (20-30% efficiency).

Engines: End Hall Thruster.

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