Block D / 11D68 Credit - © Mark Wade

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

Upper stage / space tug - in production. Launched by Proton. Also known as Block D-1; article number 11S824M. Without guidance unit (navigation commands come from payload).

Successor to 11S824. Used to launch large Lavochkin bureau unmanned lunar/planetary/high earth orbit spacecraft from 1976 to 1989.

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: 14,000 kg (30,000 lb). Main Engine: RD-58M. Main Engine: 230 kg (500 lb). Main Engine Thrust: 85.020 kN (19,113 lbf). Main Engine Propellants: Lox/Kerosene. Main Engine Propellants: 12,170 kg (26,830 lb). Main Engine Isp: 352 sec.