Encyclopedia Astronautica
RS-72



rdynrs72.jpg
RS-72
Credit: Boeing / Rocketdyne
Rocketdyne, Ottobrunn N2O4/MMH rocket engine. 55.4 kN. Isp=340s. Aestus engine enhanced with the addition of a Boeing-Rocketdyne XLR 32 turbo-pump.

Dasa (Germany)/Rocketdyne Upper Stage. Gas generator, pump-fed. The RS 72 was a bipropellant turbopump rocket engine developed by Ottobrunn together with Boeing-Rocketdyne. The RS 72 was based on the Aestus engine used on the Ariane 5 upper stage. Performance was enhanced with the addition of a Boeing-Rocketdyne XLR 32 turbo-pump.

Engine: 138 kg (304 lb). Chamber Pressure: 60.00 bar. Area Ratio: 300.

Height: 2.29 m (7.50 ft).
Diameter: 1.30 m (4.20 ft).
Thrust: 55.40 kN (12,454 lbf).
Specific impulse: 340 s.
First Launch: 1999.

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Associated Propellants
  • N2O4/MMH Nitrogen tetroxide became the storable liquid propellant of choice from the late 1950's. Monomethylhydrazine (CH3NHNH2) is a storable liquid fuel that found favour in the United States for use in orbital spacecraft engines. Its advantages in comparison to UDMH are higher density and slightly higher performance. More...

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