Notional Nitric acid/Kerosene rocket engine. R-56 Blok A. Notional engines for polyblock R-56, immense booster/ICBM; planned range 16,000 km. payload 35,000 kg. TsNIIMash has 1:10 structural simulation model.
Date: 1961. Thrust: 4,412.00 kN (991,857 lbf). Specific impulse: 320 s. Specific impulse sea level: 300 s. Burn time: 142 s.