RB545

From Wikipedia, the free encyclopedia

The RB545 was an air-breathing rocket engine that was proposed to propel HOTOL to orbit using a single stage.

The exact details of this engine are covered by the UK's Official Secrets Act; therefore there is little public information about its operation.

Within the atmosphere, hydrogen fuel would be used in a heat exchanger to precool air entering a high overall pressure ratio turbojet-like engine cycle, before being burnt with the air in a rocket motor, to produce a very high velocity propulsive jet.

Once out of the atmosphere, the RB545 would be capable of burning the hydrogen with onboard liquid oxygen as a high efficiency hydrogen/oxygen rocket.

  • Aerospaceweb.org -good information on HOTOL and a picture of the (secret) RB545!
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