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8K513 Blok B
Part of R-7 Block I stage series Family
LOx/Kerosene propellant rocket stage. Masses estimated based on total vehicle mass of 117 metric tons. Developed into Molniya/Soyuz second stage.

Thrust: 441.00 kN (99,140 lbf). Gross mass: 25,000 kg (55,000 lb). Unfuelled mass: 2,100 kg (4,600 lb). Specific impulse: 340 s. Specific impulse sea level: 240 s. Burn time: 170 s. Height: 9.15 m (30.01 ft). Diameter: 2.68 m (8.79 ft). Span: 2.68 m (8.79 ft).



Country: Russia. Engines: NK-9V. Launch Vehicles: 8K513. Propellants: Lox/Kerosene.

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