Status: Development ended 1971. Thrust: 392.00 kN (88,125 lbf). Gross mass: 58,000 kg (127,000 lb). Unfuelled mass: 8,000 kg (17,600 lb). Specific impulse: 440 s. Burn time: 540 s. Height: 16.00 m (52.00 ft). Diameter: 6.70 m (21.90 ft). Span: 6.70 m (21.90 ft).
|N1 Block Sr LOx/LH2 propellant rocket stage. Upper stage developed 1971-1974 to support manned lunar expedition. Replaced Blok R/Blok S previously under development. Capable of five restarts and 11 days of flight. Could insert 24 metric tons into lunar orbit or 20 metric tons into geosynchronous orbit.|
|Vulkan Blok V LOx/LH2 propellant rocket stage. Upper stage design by KB Saturn for manned lunar expedition, large geosynchronous platform launch.|