Proton 11S861-01
Engine 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
Gross Mass: 18,650 kg (41,110 lb). Empty Mass: 2,650 kg (5,840 lb). Thrust (vac): 83.450 kN (18,760 lbf). Isp: 361 sec. Burn time: 680 sec. Propellants: Lox/Kerosene. Diameter: 3.70 m (12.10 ft). Span: 3.70 m (12.10 ft). Length: 7.10 m (23.20 ft). Country: Russia. No Engines: 1. Engine: RD-58S. Cost $ : 4.000 million. First Flight: 1994. Last Flight: 2006. No Launched: 43. No Failed: 1. 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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