This page no longer updated from 31 October 2001. Latest version can be found at Proton K-3

Gross Mass: 50,747 kg. Empty Mass: 4,185 kg. Thrust (vac): 64,260 kgf. Isp: 325 sec. Burn time: 238 sec. Propellants: N2O4/UDMH Isp(sl): 230 sec. Diameter: 4.2 m. Span: 4.2 m. Length: 6.5 m. Country: Russia. No Engines: 1. RD-0212 Status: Hardware.
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Last update 12 March 2001.
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© Mark Wade, 2001 .