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11D49
Isayev Nitric acid/UDMH rocket engine. Kosmos-3M stage 2. Engine has one main and four steering nozzles. Thrust 157.5 + 4 x 25 kN. Predecessor was 11D47 in R-14 (derivative) stage 2. First flight 1964.

AKA: S5.23. Date: 1960-64. Number: 788 . Thrust: 157.50 kN (35,407 lbf). Unfuelled mass: 185 kg (407 lb). Specific impulse: 303 s. Burn time: 4,305 s. Height: 1.78 m (5.83 ft). Diameter: 1.92 m (6.29 ft).

Chambers: 1 + 4. Engine: 185 kg (407 lb). Chamber Pressure: 98.10 bar. Area Ratio: 103.4. Propellant Formulation: AK27I/UDMH. Thrust to Weight Ratio: 86.81. Oxidizer to Fuel Ratio: 2.65.



Family: Storable liquid. Country: Russia. Launch Vehicles: Kosmos 65S3, Kosmos 11K65, Kosmos 11K65M, Kosmos 65MP. Propellants: Nitric acid/UDMH. Stages: S3. Agency: Isayev bureau. Bibliography: 320, 342.

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