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Manufacturer Name: KTDU-425A. Government Designation: 11D425A. Designer: Isayev. Developed in: 1972-75. Application: Mars 4-7, Venera 9-16, Vega 1-2, and Phobos 1-2 maneuvering engine. Used on spacecraft: Fobos 1F, Mars M-73, Vega 5VK, Venera 4V-1, Venera 4V-2. Propellants: N2O4/UDMH Thrust(vac): 1,928 kgf. Thrust(vac): 18.89 kN. Isp: 315 sec. Burn time: 560 sec. Mass Engine: 70 kg. Diameter: 0.7 m. Length: 0.7 m. Chambers: 1. Chamber Pressure: 149.00 bar. Oxidizer to Fuel Ratio: 1.90. Country: Russia. Status: Out of Production. First Flight: 1973. References: 225 , 329 , 321 , 342 , 344 . Comments: Spacecraft maneuvering engine. Could be throttled to 9.86/9.5/2870. Chamber pressure 149 - 95 bar.
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Last update 12 March 2001.
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