Proton 11S86
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: 17,550 kg (38,690 lb). Empty Mass: 2,300 kg (5,000 lb). Thrust (vac): 85.020 kN (19,113 lbf). Isp: 352 sec. Burn time: 610 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-58M. Status: Out of production. Cost $ : 4.000 million. First Flight: 1974. Last Flight: 1990. No Launched: 66. No Failed: 1. Other designations: Block DM; D-1-e.

Also known as Block DM; article number 11S86. With guidance unit, designed for insertion of military spacecraft into geosynchonous/ medium earth orbit. Used from 1974 to 1990. Succeeded by 11S861.

Used on Launch Vehicles:  
 
 
 
 
 
 
 
 
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