Scarff ring

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Scarff ring on a Bristol F.2B at the Shuttleworth Collection

The Scarff ring was a type of machine gun mounting developed during the First World War by Warrant Officer (Gunner) F. W. Scarff of the Admiralty Air Department - for use on two-seater aircraft. The mount allowed an airgunner in an open cockpit to swivel his weapon (typically one or two Lewis machine guns) around and easily fire in any direction. It was simple, rugged, and gave its operator an excellent field of fire. It was widely adapted and copied for other airforces.

As well as becoming a standard fitting in the British forces during the First World War, the Scarff ring was used in the post war Royal Air Force for many years - perhaps the last British aircraft to use the mounting being the Supermarine Walrus amphibian.

Scarff was also involved in the development of the Scarff-Dibovsky interrupter gear.