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astronautix.com Proton 11S861-01
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: 18,650 kg. Empty Mass: 2,650 kg. Thrust (vac): 8,510 kgf. Isp: 361 sec. Burn time: 680 sec. Propellants: Lox/Kerosene Diameter: 3.7 m. Span: 3.7 m. Length: 7.1 m. Country: Russia. No Engines: 1. RD-58S Status: Hardware. Other designations: Block DM; D-1-e.

Also known as Block DM-2M, article number 11S861-01. Commercial versions are Block DM3, with Saab payload dispenser, for insertion of Hughes HS 601 bus spacecraft into geosynchronous orbit; and Block DM4, for insertion of FS-1300 bus spacecraft into geosynchronous orbit.. With guidance unit, originally designed for insertion of military spacecraft into geosynchonous orbit. Capable of boosting heavier payloads than 11S861 through use of higher-performance 'sintin' synthetic kerosene fuel.

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Last update 12 March 2001.
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