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Manufacturer Name: KTDU-53. Other Designations: S5.53. Designer: Isayev. Developed in: 1962-67. Application: Zond 4-7 maneuvering engine. Used on spacecraft: Soyuz 7K-L1, Soyuz 7K-L1E, Soyuz 7K-L1P, Soyuz 7K-L1S. Propellants: Nitric acid/UDMH Thrust(vac): 417 kgf. Thrust(vac): 4.09 kN. Isp: 280 sec. Diameter: 2.5 m. Length: 1.1 m. Chambers: 1. Chamber Pressure: 39.20 bar. Oxidizer to Fuel Ratio: 1.85. Country: Russia. Status: Out of Production. References: 321 . Comments: Spacecraft maneuvering engine, derivative of KTDU-35 without back-up engine. .
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Last update 12 March 2001.
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