This page no longer updated from 31 October 2001. Latest version can be found at www.astronautix.com

astronautix.com RD-58M

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-58M. Government Designation: 11D58M. Designer: Korolev. Developed in: 1970-74. Application: Proton 8K824K / 11S824M; 11S824F; 11S86; 11S861; 17S40 stage 4 (block DM). Used on stages: Proton 11S824F, Proton 11S824M, Proton 11S86, Proton 11S861, Proton 17S40. Used on launch vehicles: Proton 8K82K / 11S824F, Proton 8K82K / 11S824M, Proton 8K82K / 11S86, Proton 8K82K / 11S861, Proton 8K82K / 17S40, Proton 8K82K / DM1, Proton 8K82K / DM2. Propellants: Lox/Kerosene Thrust(vac): 8,500 kgf. Thrust(vac): 83.40 kN. Isp: 353 sec. Burn time: 680 sec. Mass Engine: 230 kg. Diameter: 1.2 m. Length: 2.3 m. Chambers: 1. Chamber Pressure: 77.50 bar. Area Ratio: 189.00. Oxidizer to Fuel Ratio: 2.48. Country: Russia. Status: In Production. First Flight: 1974. Last Flight: 1999. Flown: 177. References: 42 , 315 .

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.



Back to Index
Last update 12 March 2001.
Definitions of Technical Terms.
Contact Mark Wade with any corrections or comments.
Conditions for use of drawings, pictures, or other materials from this site..
© Mark Wade, 2001 .