Encyclopedia Astronautica

N2O4/UDMH propellant rocket stage. Loaded/empty mass 125,000/8,500 kg. Thrust 2,640.00 kN. Vacuum specific impulse 301 seconds.

Cost $ : 6.000 million.

Status: Retired 1971.
Gross mass: 125,000 kg (275,000 lb).
Unfuelled mass: 8,500 kg (18,700 lb).
Height: 18.90 m (62.00 ft).
Diameter: 3.00 m (9.80 ft).
Span: 3.00 m (9.80 ft).
Thrust: 2,640.00 kN (593,490 lbf).
Specific impulse: 301 s.
Specific impulse sea level: 269 s.
Burn time: 120 s.
Number: 26 .

More... - Chronology...

Associated Countries
Associated Engines
  • RD-251 Glushko N2O4/UDMH rocket engine. 2643 kN. R-36-0 stage 1, Tsyklon 2 stage 1. In production. Assembly of 3 RD-250-type units. Isp=301s. First flight 1965. More...

Associated Launch Vehicles
  • R-36-O Ukrainian orbital missile. The R-36-O was the only orbiting military nuclear weapon ever deployed, although in order to remain legal under international treaties it was a 'fractional orbital' weapon. Although American infrared early warning satellites invalidated the 'surprise attack' component of the concept, 18 missiles were operational from 1969 to 1983. 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...

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