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KTDU-425A
Part of KTDU-425 Family
Isayev N2O4/UDMH rocket engine. Mars 4-7, Venera 9-16, Vega 1-2, and Fobos 1-2 maneuvering engine. Out of Production. Could be throttled to 9.86/9.5/2870. Chamber pressure 149 - 95 bar. First flight 1973.

AKA: 11D425A. Status: Out of Production. Date: 1972-75. Thrust: 18.89 kN (4,247 lbf). Unfuelled mass: 70 kg (154 lb). Specific impulse: 315 s. Burn time: 560 s. Height: 0.71 m (2.32 ft). Diameter: 0.70 m (2.29 ft).

Throttled thrust(vac): 9.856 kN (2,216 lbf). Engine: 70 kg (154 lb). Chamber Pressure: 149.00 bar. Thrust to Weight Ratio: 27.54. Oxidizer to Fuel Ratio: 1.9. Coefficient of Thrust vacuum: 0. Coefficient of Thrust sea level: 0.



Family: Storable liquid. Country: Russia. Spacecraft: Mars M-73, Venera 4V-1, Venera 4V-2, Vega 5VK, Fobos 1F. Propellants: N2O4/UDMH. Agency: Isayev bureau.

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