Kuznetsov LOx/Kerosene rocket engine. N1M 1965 - A. Study 1965. As described in N1 improvement study, 1965. Huge modification of Block A engines - sea level thrust increased from 175 metric tons thrust to 250 metric tons.
Status: Study 1965. Date: 1965. Thrust: 2,843.00 kN (639,131 lbf). Specific impulse: 346 s.