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Gross Mass: 23,000 kg.
Empty Mass: 4,300 kg. Thrust (vac): 7,500 kgf. Isp: 440 sec. Burn time: 1,080 sec. Propellants: Lox/LH2 Diameter: 4.1 m. Span: 4.1 m. Length: 8.7 m. Country: Russia. No Engines: 1. RD-56 Status: Testing 1976. Comments: Designed 1965-1971 as replacement for N-1 Blok D. Cancelled 1971 in favor of Blok Sr; revived and developed in 1974-1976. First static test Oct 12 1976. Two stages tested 1976-1977. Strangely never replaced Blok D on Proton.
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Last update 12 March 2001.
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© Mark Wade, 2001 .