Kosberg N2O4/UDMH rocket engine. UR-100N / RS-18 (SS-19) stage 2 vernier. Out of Production. Developed in 1969-1974 / problems not solved until 1978. Vernier engines. Gas generator cycle.
Status: Out of Production. Date: 1969-74. Thrust: 15.76 kN (3,543 lbf). Specific impulse: 293 s. Specific impulse sea level: 18 s.