Proton K-4H

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Model: Proton K-4H. Gross Mass: 21,700 kg (47,800 lb). Empty Mass: 3,000 kg (6,600 lb). Thrust (vac): 98.000 kN (22,031 lbf). Isp: 401 sec. Burn time: 750 sec. Propellants: LF2/Ammonia. Isp(sl): 80 sec. Diameter: 4.00 m (13.10 ft). Span: 4.00 m (13.10 ft). Length: 6.00 m (19.60 ft). Country: Russia. No Engines: 1. Motor: RD-301. Status: Development 1992. Cost $ : 20.000 million. First Flight: 1977. Contact us with any corrections, additions, or comments. Conditions for use of drawings, pictures, or other materials from this site.. To contact astronauts or cosmonauts. © Mark Wade, 1997 - 2008 except where otherwise noted.