Encyclopedia Astronautica
RD-0203



wrd0203.jpg
RD-0203
Credit: KBKhA
Kosberg N2O4/UDMH rocket engine. 559 kN. UR-200 stage 1. Hardware. DU consisting of 4 RD-0204 gimballed motors. Staged combustion cycle. Isp=311s. First flight 1964.

Application: UR-200 stage 1.

Thrust (sl): 2,000.000 kN (449,600 lbf). Thrust (sl): 204,000 kgf. Engine: 381 kg (839 lb). Area Ratio: 29.81. Thrust to Weight Ratio: 149.5. Oxidizer to Fuel Ratio: 2.6.

AKA: 8D44.
Status: Hardware.
Gross mass: 1,961 kg (4,323 lb).
Unfuelled mass: 1,525 kg (3,362 lb).
Height: 1.80 m (5.90 ft).
Diameter: 0.89 m (2.91 ft).
Thrust: 559.00 kN (125,668 lbf).
Specific impulse: 311 s.
Specific impulse sea level: 278 s.
Burn time: 136 s.
First Launch: 1961-64.

More... - Chronology...


Associated Countries
See also
Associated Manufacturers and Agencies
  • Kosberg Russian manufacturer of rocket engines. Kosberg Design Bureau, Russia. More...

Associated Propellants
  • N2O4/UDMH Nitrogen tetroxide became the storable liquid propellant of choice from the late 1950's. Unsymmetrical Dimethylhydrazine ((CH3)2NNH2) became the storable liquid fuel of choice by the mid-1950's. Development of UDMH in the Soviet Union began in 1949. It is used in virtually all storable liquid rocket engines except for some orbital manoeuvring engines in the United States, where MMH has been preferred due to a slightly higher density and performance. More...

Bibliography
  • Golubev, A A, KB KhimAvtomatiki - Straniy Istorii, Vol. 1, Voronezh 1995 via Dietrich Haeseler.

Associated Stages
  • UR-200-1 N2O4/UDMH propellant rocket stage. Loaded/empty mass 107,500/6,600 kg. Thrust 2,235.00 kN. Vacuum specific impulse 311 seconds. Tsniimash has 1:10 structural simulation model. Developed 1960-1965. Orevo has sectioned hardware. All data accurate except empty mass prorated between first and second stages. More...

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