Engine Model: RD-0203. Manufacturer Name: RD-0203. Government Designation: 8D44. Designer: Kosberg. Developed in: 1961-64. Application: UR-200 stage 1. Gross Mass: 1,961 kg (4,323 lb). Empty Mass: 1,525 kg (3,362 lb). Propellants: N2O4/UDMH. Thrust(vac): 559.000 kN (125,668 lbf). Thrust(sl): 2,000.000 kN (449,600 lbf). Isp: 311 sec. Isp (sea level): 278 sec. Burn time: 136 sec. Mass Engine: 381 kg (839 lb). Diameter: 0.89 m (2.91 ft). Length: 1.80 m (5.90 ft). Chambers: 1. Area Ratio: 29.81. Oxidizer to Fuel Ratio: 2.60. Thrust to Weight Ratio: 149.50. Country: Russia. Status: Hardware. First Flight: 1964. DU consisting of 4 RD-0204 gimballed motors. Staged combustion cycle.
Bibliography:- Golubev, A A, KB KhimAvtomatiki - Straniy Istorii, Vol. 1, Voronezh 1995 via Dietrich Haeseler.
