Isayev N2O4/UDMH rocket engine. Salyut 6, 7and Mir orbital propulsion maneuvering engine. In Production. Probably derived from engine of propulsion system KDU-426. Pressure fed engine.
AKA: S5.79. Status: In Production. Thrust: 3.09 kN (695 lbf). Unfuelled mass: 39 kg (85 lb). Height: 0.55 m (1.80 ft). Diameter: 0.84 m (2.75 ft).
Engine: 39 kg (85 lb). Thrust to Weight Ratio: 8.18.