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R-56 Block O
R- 56 Stage 3
R- 56 Stage 3
N2O4/UDMH propellant rocket stage. Empty mass estimated (rounded figures given in source material indicates impossible 31 metric tons gross with 30 metric tons propellant).

AKA: Orbital Block. Status: Study 1961. Thrust: 544.20 kN (122,341 lbf). Gross mass: 32,000 kg (70,000 lb). Unfuelled mass: 2,000 kg (4,400 lb). Specific impulse: 327 s. Burn time: 190 s. Height: 7.00 m (22.90 ft). Diameter: 4.00 m (13.10 ft). Span: 4.00 m (13.10 ft).



Country: Ukraine. Engines: RD-0213. Launch Vehicles: R-56. Propellants: N2O4/UDMH.

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