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Proton 17S40
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11d68.jpg+Block D / 11D68
Aft view of the Block D lunar crasher stage and its 11D68 engine. The Block D would have taken the LK lunar lander to near the surface of the moon. This stage remains in use today atop the Proton rocket.
Credit - © Mark Wade
+240Gross Mass: 14,600 kg (32,100 lb). Empty Mass: 3,300 kg (7,200 lb). Thrust (vac): 85.020 kN (19,113 lbf). Isp: 352 sec. Burn time: 450 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. Cost $ : 4.000 million. First Flight: 1997. Last Flight: 2002. No Launched: 6. Other designations: Block DM; D-1-e. Also known as Block DM-5. Commercial version is Block DM2, with Iridium dispenser, designed for insertion of multiple LM 700 (Iridium) spacecraft into medium earth orbit. With guidance unit, modification of 11S861 stage for heavier payloads and with different payload adapter.
Used on Launch Vehicles:
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© Mark Wade, 1997 - 2007 except where otherwise noted.
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