Block D 11S824

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Engine 11D68 detail
Credit - © Mark Wade

Other Designations: 11S824; Block D; D-1-e. Class: Tug. Nation: Russia.

Upper stage / space tug - out of production. Launched by Proton. Block D, article number 11S824. Without guidance unit (navigation commands come from payload).

Originally designed as N1-L3 lunar expedition launch vehicle lunar orbit insertion/lunar crasher stage. Adapted for use with Proton UR-500K as a fourth stage for manned circumlunar flight. Further used to launch large Lavochkin bureau unmanned lunar/planetary spacecraft. Flown from 1967 to 1975.

Kerosene changed from T-1 to RG-1 to achieve sufficient chamber cooling.

Unit Cost $: 4.000 million. Length: 5.50 m (18.00 ft). Basic Diameter: 3.70 m (12.10 ft). Span: 3.70 m (12.10 ft). Mass: 13,360 kg (29,450 lb). Main Engine: RD-58. Main Engine: 300 kg (660 lb). Main Engine Thrust: 83.300 kN (18,727 lbf). Main Engine Propellants: Lox/Kerosene. Main Engine Propellants: 11,560 kg (25,480 lb). Main Engine Isp: 346 sec.

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© Mark Wade, 1997 - 2008 except where otherwise noted.