| RAF 4 | |
|---|---|
 | |
| Preserved RAF 4a engine at theScience Museum (London) | |
| Type | Pistoninlineaero engine |
| Manufacturer | Royal Aircraft Factory |
| Designer | A.J. Rowledge |
| First run | December 1914 |
| Major applications | Royal Aircraft Factory R.E.8 |
| Number built | >3,600 |
| Developed from | RAF 1 |
TheRAF 4 is a Britishair-cooled,V12 engine developed foraircraft use duringWorld War I. Based on the eight–cylinderRAF 1 it was designed by theRoyal Aircraft Factory but produced by the two British companies ofDaimler andSiddeley-Deasy. TheRAF 5 was apusher version of the same engine.[1]
Aturbocharged experimental version of the RAF 4, the RAF 4d, was developed using aRateau exhaust-driven turbocharger. The engine was test-flown in aR.E.8, but the turbocharging experiments were abandoned after the turbine failed on 4 May 1918.[2]
A preserved RAF 4a engine is on public display at theScience Museum (London).
Data fromLumsden[3]
Related development
Comparable engines
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