Notional Nitric acid/Kerosene rocket engine. R-56 Blok B. 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: 784.00 kN (176,250 lbf). Specific impulse: 330 s. Burn time: 205 s.