S1.5400

Block L rocket stage
Credit - © Mark Wade

Government Designation: 11D33. Other Designations: S1.5400. Designer: Korolev. Developed in: 1958-60. Application: Molniya 8K78-3. Propellants: Lox/Kerosene. Thrust(vac): 66.700 kN (14,995 lbf). Isp: 340 sec. Burn time: 207 sec. Mass Engine: 153 kg (337 lb). Chambers: 1. Chamber Pressure: 53.50 bar. Thrust to Weight Ratio: 43.59. Country: Russia. First Flight: 1960. Last Flight: 1965. Flown: 26.

Originally designed by Korolev; passed to Isayev for production. Began a series of engines leading through the 8D726 for GR-1 to the Block D for the N1 and Proton. Earliest versions with 6380 kgf and 338.5 sec specific impulse.

S1.5400 used on Rocket Stages

Used on stage: Molniya 8K78-3. on launch vehicle: Molniya 8K78.

S1.5400 used on Spacecraft

Used on: Block L Molniya 8K78.

Bibliography and Further Reading

Varfolomyev, Timothy, Spaceflight, "Soviet Rocketry that Conquered Space - 8K71 launches", 1996, Volume 38, page 31. 1: Sp 95/37-260; Sp 96/38-31 (8K71 launches); 2: Sp 96/38-48; 3: Sp 96/38-206; Sp 96/38-317 (designatons); 4: Sp 98/40-28; 5:Sp 98/40-85

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