This page no longer updated from 31 October 2001.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

astronautix.com Proton 11S861

Engine 11D68 detail
Engine 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.



Gross Mass: 17,300 kg. Empty Mass: 2,300 kg. Thrust (vac): 8,670 kgf. Isp: 352 sec. Burn time: 600 sec. Propellants: Lox/Kerosene Diameter: 3.7 m. Span: 3.7 m. Length: 7.1 m. Country: Russia. No Engines: 1. RD-58M Status: Hardware. Other designations: Block DM; D-1-e.

Also known as Block DM-2 (different from commercial Block DM2 (no hyphen!)), article number 11S861. Commercial version designated Block DM1 and is equipped with Saab payload adapter for insertion of AS 4000 bus spacecraft into geosynchronous orbit. With improved guidance system as compared to 11S86, originally designed for insertion of military spacecraft into geosynchonous orbit. Used from 1982 to present.


Block D / 11D68Block 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.



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 .