Rolls-royce Corporation

Brian Davis

Stephen John Bradbrook

Richard James Wilson

A spool for turbo machinery comprises a fluid flow path defined by an axial compressor stage adjacent to a mixed flow compressor stage to thereby provide a compression system which has a relatively high ratio of efficiency to compressor diameter.

Spool for turbo machinery

A bypass turbofan gas turbine engine is started by means of electric starter motor mounted directly about a downstream end or upstream of the low pressure spool of the engine. This causes air to be driven by a fan through a bypass duct around the engine casing. Closures close to substantially seal an outlet of the bypass duct, and the air is directed into a combustion chamber of the engine and through the turbines, causing the high pressure spool to pick up speed for starting.

Gas turbine engine

A bypass turbofan gas turbine engine is started by an electric starter motor that is mounted directly about a downstream end or upstream of the low pressure spool of the engine. This causes air to be driven by a fan through a bypass duct around the engine casing. Closures close to substantially seal an outlet of the bypass duct, and the air is directed into a combustion chamber of the engine and through the turbines causing the high pressure spool to pick up speed for starting.

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Bristol, United Kingdom

Brian Davis