RAF 4
The RAF 4 was a British air-cooled, V12 engine developed for aircraft use during World War I. Based on the eight–cylinder RAF 1 it was designed by the Royal Aircraft Factory but produced by the two British companies of Daimler and Siddeley-Deasy. The RAF 5 was a pusher version of the same engine.Turbocharger
In April 1918 a turbocharged experimental version of the RAF 4d was developed using a Rateau turbocharger, the engine being flown in the R.E.8 B738.Variants
;RAF 4
;RAF 4a
;RAF 4d
;RAF 4e
;RAF 5
;RAF 5bApplications
RAF 4
- Armstrong Whitworth F.K.8
- Bristol F.2 Fighter
- Royal Aircraft Factory B.E.12
- Royal Aircraft Factory R.E.7
- Royal Aircraft Factory R.E.8
- Siddeley-Deasy R.T.1
- Vickers F.B.14
RAF 5
- Royal Aircraft Factory F.E.2
- Royal Aircraft Factory F.E.4
Engines on display
A preserved RAF 4a engine is on public display at the Science Museum.
