Cold start surge current limiting system for a hydrazine thruste

Details Cold start surge current limiting system for a hydrazine thruste Cold start surge current limiting system for a hydrazine thruste

1983-04-01

1985-06-18

Casaregola, Louis J.

Power plants

Reaction motor

Electric, nuclear, or radiated energy fluid heating means

60 39462, 219497, 219505, F02K 968

Patent

active

045234299

ABSTRACT:
An electrothermal hydrazine thruster passes the hydrazine through a catalyst bed and an augmentation heater. The augmentation heater includes an electrical heating element powered by a satellite battery. A load resistance is coupled in series with the heating element to reduce the current through the electrical circuit including the heating element to a safe level. A switch coupled across the load resistance is closed bypassing the load resistance when the heating element heats up and increases its resistance value to a value that can be tolerated in the battery circuit.

REFERENCES:
patent: 2999358 (1961-09-01), Zwick
patent: 3651644 (1972-03-01), Breen et al.
patent: 3789190 (1974-01-01), Orosy et al.
patent: 3956885 (1976-05-01), Davis et al.
patent: 4288982 (1981-09-01), Kuenzly et al.
patent: 4322946 (1982-04-01), Murch et al.

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