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astronautix.com R-56 Block K
R- 56 Stage 4
R- 56 Stage 4 -

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Gross Mass: 9,400 kg. Empty Mass: 700 kg. Thrust (vac): 12,000 kgf. Isp: 350 sec. Burn time: 350 sec. Propellants: N2O4/Aerozine-50 Diameter: 4.0 m. Span: 4.0 m. Length: 5.0 m. Country: Ukraine. No Engines: 1. RD-280 Other designations: Space Block. Comments: Empty mass estimated (rounded figures given in source material indicates impossible 9 tonnes gross with 8.7 tonnes propellant).
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Last update 12 March 2001.
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© Mark Wade, 2001 .