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Proton 11S86
Part of Block D
LOx/Kerosene propellant rocket stage. Also known as Block DM; article number 11S86. With guidance unit, designed for insertion of military spacecraft into geosynchronous/ medium earth orbit. Used from 1974 to 1990. Succeeded by 11S861.

AKA: Block DM;D-1-e. Status: Retired 1990. Thrust: 85.02 kN (19,113 lbf). Gross mass: 17,550 kg (38,690 lb). Unfuelled mass: 2,300 kg (5,000 lb). Specific impulse: 352 s. Burn time: 610 s. Height: 7.10 m (23.20 ft). Diameter: 3.70 m (12.10 ft). Span: 3.70 m (12.10 ft).

Cost $ : 4.000 million.

Family: Space Tugs. Country: Russia. Engines: RD-58M, 11D79. Launch Vehicles: Proton-K/DM. Propellants: Lox/Kerosene.
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