Bristol Orion

The Bristol Orion aero engine is a two-shaft turboprop intended for use in later marks of the Bristol Britannia and the Canadair CL-44. Although the engine was built and underwent a development program, the BE.25 Orion project was cancelled in 1958 by the British Ministry of Supply in favour of the Rolls-Royce Tyne. In addition, interest in turboprop-powered aircraft was beginning to wane, because of the successful introduction of the Boeing 707 and Douglas DC-8 jetliners into airline service.

For the 1920s piston engine, see Bristol Jupiter.

Orion
Bristol Orion on display at the Rolls-Royce Heritage Trust, Derby
Type Turboprop
Manufacturer Bristol Siddeley
First run 1956
Major applications Bristol Britannia

The Orion gas generator had been chosen by French aircraft designer Wibault to power a vectored thrust aircraft which ultimately became the Hawker Siddeley P.1127 but with a Bristol Siddeley Orpheus gas generator which had a compressor derived from the Orion low pressure compressor.

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