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RD-58M
Part of RD-58 Family

Block D / 11D68

Block D / 11D68
Aft view of the Block D lunar crasher stage and its 11D68 engine. The Block D would have taken the LK lunar lander to near the surface of the moon. This stage remains in use today atop the Proton rocket.
Credit: © Mark Wade

Kosberg Lox/Kerosene rocket engine. Proton 8K824K / 11S824M; 11S824F; 11S86; 11S861; 17S40 stage 4 (block DM). In production. First flight 1974.

AKA: 11D58M. Status: In production. Date: 1970-74. Number: 212 . Thrust: 83.40 kN (18,749 lbf). Unfuelled mass: 230 kg (500 lb). Specific impulse: 353 s. Burn time: 680 s. Height: 2.27 m (7.44 ft). Diameter: 1.17 m (3.83 ft).

Engine: 230 kg (500 lb). Chamber Pressure: 77.50 bar. Area Ratio: 189. Thrust to Weight Ratio: 36.95. Oxidizer to Fuel Ratio: 2.48.



Country: Russia. Launch Vehicles: Proton-K/DM, Proton-K/D-1, Proton-K/DM-2, Proton-K/DM-2 DM1, Proton-K/D-2, Proton-K/17S40, Proton-K/17S40 DM2. Propellants: Lox/Kerosene. Stages: Proton 11S824M, Proton 11S86, Proton 11S824F, Zenit-V, Proton 17S40, Proton 11S861. Agency: Korolev bureau.
Photo Gallery

Engine 11D68 detailEngine 11D68 detail
Close-up view of the 11D68 Block D lunar crasher stage showing detail of the BOZ orientation/ullage thrusters that control the stage during coast, restart, and manoeuvre.
Credit: © Mark Wade



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