Kuznetsov air augmented rocket engine. N1-MOK. Study 1974. Ultimate derivative of NK-9. Propellants changed to LH2/LOX, 16 x modified NK-33 engines + 4 Liquid Air Cycle Engine Liquid Air/LH2 boosters.
AKA: NK-33 LH2 Mod. Status: Study 1974. Date: 1974. Thrust: 980.70 kN (220,470 lbf). Specific impulse: 430 s. Burn time: 410 s.
All figures estimated based on tank volume of Block A and delivery of 90,000 kg payload to 400 kg MKBS orbit.