RAF 4
The RAF 4 is 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
A turbocharged experimental version of the RAF 4, the RAF 4d, was developed using a Rateau exhaust-driven turbocharger. The engine was test-flown in a Royal Aircraft [Factory R.E.8|R.E.8], but the turbocharging experiments were abandoned after the turbine failed on 4 May 1918.Variants
;RAF 4;RAF 4a
;RAF 4d
;RAF 4e
;RAF 5
;RAF 5b
Applications
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