Rolls-Royce Crecy

Crecy
The Rolls-Royce Crecy
Type	Liquid-cooled V-12 two-stroke piston engine
Manufacturer	Rolls-Royce Limited
Designer	Eddie Gass (Chief Designer)
First run	11 April 1941
Major applications	Not flown (intended for the Supermarine Spitfire)
Number built	6 plus 8 V-twin test units

The Rolls-Royce Crecy was a British experimental two-stroke, 90-degree, V12, liquid-cooled aero-engine of 1,593.4 cu.in (26.11 L) capacity, featuring sleeve valves and direct petrol injection. Initially intended for a high-speed "sprint" interceptor fighter, the Crecy was later seen as an economical high-altitude long-range powerplant. Developed between 1941 and 1946, it was among the most advanced two-stroke aero-engines ever built. The engine never reached flight trials and the project was cancelled in December 1945, overtaken by the progress of jet engine development.

The engine was named after the Battle of Crécy, after Rolls-Royce chose battles as the theme for naming their two-stroke aero engines. Rolls-Royce did not develop any other engines of this type.