This page no longer updated from 31 October 2001. Latest version can be found at Tsyklon 2-1

Gross Mass: 122,300 kg. Empty Mass: 6,400 kg. Thrust (vac): 270,000 kgf. Isp: 301 sec. Burn time: 120 sec. Propellants: N2O4/UDMH Isp(sl): 269 sec. Diameter: 3.0 m. Span: 3.0 m. Length: 18.9 m. Country: Ukraine. No Engines: 1. RD-251 Status: Hardware. Other designations: 11S681. Comments: SL-11; 11K68;R-36M.
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Last update 12 March 2001.
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© Mark Wade, 2001 .