Isayev N2O4/UDMH rocket engine. R-27 / RSM-25 (SS-N-6). Out of Production. First engine system to be submerged in propellant tank. One main engine chamber plus unknown number (probably 4) of steering thrusters. Thrust 226 + 29 kN.
Status: Out of Production. Thrust: 255.00 kN (57,326 lbf).