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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. 52,122 bytes. 398 x 580 pixels.

Manufacturer Name: RD-58. Government Designation: 11D58. Designer: Korolev. Developed in: 1964-68. Application: N-1 stage 5; Proton 8K82K / 11S824 stage 4 (block D). Used on stages: Energia RCS, N1 Block D, Proton 11S824. Used on launch vehicles: Energia, N1, N1F, Proton 8K82K / 11S824. Propellants: Lox/Kerosene Thrust(vac): 8,500 kgf. Thrust(vac): 83.40 kN. Isp: 349 sec. Burn time: 600 sec. Mass Engine: 300 kg. Diameter: 1.2 m. Chambers: 1. Chamber Pressure: 78.00 bar. Area Ratio: 189.00. Country: Russia. Status: Out of Production. First Flight: 1967. Last Flight: 1988. Flown: 45. References: 21 . Comments: Kerosene changed from T-1 to RG-1 to achieve sufficient chamber cooling.

Engine 11D68 detailEngine 11D68 detail - Closeup view of the 11D68 Block D lunar crasher stage showing detiail of the BOZ orientation/ullage thrusters that control the stage during coast, restart, and maneuver.

Credit: © Mark Wade. 43,376 bytes. 393 x 424 pixels.

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Last update 12 March 2001.
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