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Government Designation: 11D49. Other Designations: S5.23. Designer: Isayev. Developed in: 1960-64. Application: Kosmos-3M stage 2. Used on stages: Kosmos-2. Used on launch vehicles: Kosmos 11K65, Kosmos 11K65M, Kosmos 65MP, Kosmos 65S3. Propellants: Nitric acid/UDMH Thrust(vac): 16,060 kgf. Thrust(vac): 157.50 kN. Isp: 303 sec. Burn time: 4,305 sec. Mass Engine: 185 kg. Diameter: 1.9 m. Length: 1.8 m. Chambers: 1 + 4. Chamber Pressure: 98.10 bar. Area Ratio: 103.40. Oxidizer to Fuel Ratio: 2.65. Country: Russia. Status: In Production. First Flight: 1964. Last Flight: 1999. Flown: 441. References: 320 , 342 . Comments: Engine has one main and four steering nozzles. Thrust 157.5 + 4 x 25 kN. Precessor was 11D47 in R-14 (derivative ?) stage 2.
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Last update 12 March 2001.
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