Sleeve valve
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The sleeve valve is a type of valve mechanism for piston engines, distinct from the usual poppet valve. Sleeve valve engines saw use in a number of pre–World War II luxury cars and in the United State
Sleeve valve closeup from a Bristol Centaurus Mark 175.
Bristol Perseus
Knight sleeve-valve engine
Argyll single sleeve valve
Bristol Centaurus
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The Centaurus was the final development of the Bristol Engine Company's series of sleeve-valve radial aircraft engines. The Centaurus was an 18-cylinder, two-row design that eventually delivered over
Sleeve valve
…a system which, after extensive development, saw substantial use in British aircraft engines of the 1940s, such as the Napier Sabre, Bristol Hercules, Centaurus, and the promising but never mass-produced Rolls-Royce Crecy, only to be supplanted by the jet engines. A sleeve valve takes the form of one (or in the…
Bristol Centaurus on display at the Fleet Air Arm Museum
Bristol Centaurus powered Fairey Spearfish
A Centaurus with cylinders removed exposing the sleeve valves.