Gentlemen, I give you the Whittle engine.

The latter having several stages of rotating blades each stage increasing the compression ratio were potentially more efficient but were much more difficult to develop. By this time he was a Group Captain having been promoted from Wing Commander in July 1943. In July when Whittle's stay at Cambridge was over he was released to work full-time on the engine.

He joined BOAC as a technical advisor before working as an engineering specialist in one of Shell Oil's subsidiaries followed by a position with Bristol Aero Engines. Despite limited funding a prototype was created which first ran in 1937. He excelled in his studies and became an accompliFrank Whittled pilot.