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Class: Tug. Nation: Russia.

Upper stage / space tug using high energy propellants. To have been launched by Proton; ground tested but never flown.

Developed by Glushko beginning in 1965. Planned for use in Proton K-4H high energy upper stage. Motor tested but never flown.

Unit Cost $: 20.000 million. Length: 6.00 m (19.60 ft). Basic Diameter: 4.00 m (13.10 ft). Span: 4.00 m (13.10 ft). Mass: 21,700 kg (47,800 lb). Main Engine: RD-301. Main Engine: 183 kg (403 lb). Main Engine Thrust: 98.000 kN (22,031 lbf). Main Engine Propellants: LF2/Ammonia. Main Engine Propellants: 18,700 kg (41,200 lb). Main Engine Isp: 401 sec.


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