Encyclopedia Astronautica
RD-502



rd502.jpg
RD-502
NPO Enerogmash Museum, November 1992
Credit: © Dietrich Haeseler
Glushko H2O2/Pentaborane rocket engine. 98.1 kN. Experimental upper stage engine. Developed 1960-66. Isp=380s. Experimental upper stage engine. Program stopped due to toxicity of propellants. Intended for Proton upper stage. First flight 1966.

Initially proposed by Glushko for N-1 in September 1960.

Application: Experimental upper stage engine.

Characteristics

Engine: 132 kg (291 lb). Chamber Pressure: 147.00 bar. Thrust to Weight Ratio: 75.75.

Status: Developed 1960-66.
Unfuelled mass: 132 kg (291 lb).
Height: 2.51 m (8.23 ft).
Diameter: 1.18 m (3.87 ft).
Thrust: 98.10 kN (22,054 lbf).
Specific impulse: 380 s.
First Launch: 1960-66.

More... - Chronology...


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

Associated Propellants
  • H2O2/Pentaborane Hydrogen peroxide is used as both an oxidiser and a monopropellant. Relatively high density and non-toxic, it was abandoned after early use in British rockets, but recently revived as a propellant for the Black Horse spaceplane. Pentaborane (B5H9) was considered as a high performance fuel in the US in the 1950's. Its development was pursued with some vigour by Glushko in Russia during the 1960's. But like the other fluorine and boron motors of the time, it presented too many handling and safety problems to be adopted as a flight engine. More...

Bibliography
  • Haeseler, Dietrich, Information from NPO Energomash museum exhibit, Nov. 1992 via Dietrich Haeseler.

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