MR-510 Redmond Hydrazine rocket engine. In Production. Arcjet system.
MR-502 Redmond hydrazine monopropellant rocket engine. Communications satellite N-S stationkeeping, MMAS 5000. In Production. First flight 1991.
MR-512 Redmond Hydrazine rocket engine. In Production. Low-voltage bus arcjet system. Input power 1780 W at 35 V DC.
MR-508 Redmond hydrazine monopropellant rocket engine. Communications satellite N-S stationkeeping, MMAS 7000. In Production. First flight 1993.
MR-509 Redmond Hydrazine rocket engine. In Production. Low-power arcjet system. Input power 1800 W at 65 V DC.
MR-501B Redmond Hydrazine rocket engine. BSAT-2 communications satellite. In Production. Electrothermal hydrazine thruster (EHT). 493 W input power at 24 V DC.
