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Proton 11S861
Part of Block D Family
LOx/Kerosene propellant rocket stage. 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 geosynchronous orbit. Used from 1982 to present.

AKA: Block DM;D-1-e. Status: Active. Thrust: 85.02 kN (19,113 lbf). Gross mass: 17,300 kg (38,100 lb). Unfuelled mass: 2,300 kg (5,000 lb). Specific impulse: 352 s. Burn time: 600 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-2, Proton-K/DM-2 DM1. Propellants: Lox/Kerosene.

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