RAF 4

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{{infobox aero engine

{|{{Infobox Aircraft Begin

|name=RAF 4

|name=RAF 4

|image=RAF4engine.JPG

|image=RAF4engine.JPG

|caption=Preserved RAF 4a engine at the [[Science Museum (London)]]

|caption=Preserved RAF 4a engine at the [[Science Museum (London)]]

|=[[Reciprocating engine|Piston]] [[Inline engine (aviation)|inline]] [[Aircraft engine|aero engine]]

}}{{Infobox Aircraft Engine

|type=[[Reciprocating engine|Piston]] [[Inline engine (aviation)|inline]] [[Aircraft engine|aero engine]]

|manufacturer=[[Royal Aircraft Factory]]

|manufacturer=[[Royal Aircraft Factory]]

|designer=[[Arthur Rowledge|A.J. Rowledge]]

|designer=[[Arthur Rowledge|A.J. Rowledge]]

|first run=December 1914

|=December 1914

|major applications=[[Royal Aircraft Factory R.E.8]]

|=[[Royal Aircraft Factory R.E.8]]

|number built = >3,600

| = >3,600

| = [[RAF 1]]

|program cost =

|unit cost =

| =

|variants_with_their_own_articles =

|developed from = [[RAF 1]]

|developed into =

|variants with their own articles =

}}

}}

|}

The ”’RAF 4”’ is a British [[Air-cooled engine|air-cooled]], [[V12 engine|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 Company|Daimler]] and [[Siddeley-Deasy]]. The ”’RAF 5”’ was a [[Pusher configuration|pusher]] version of the same engine.<ref>Gunston, 1989, p. 156.</ref>

The ”’RAF 4”’ is a British [[Air-cooled engine|air-cooled]], [[V12 engine|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 Company|Daimler]] and [[Siddeley-Deasy]]. The ”’RAF 5”’ was a [[Pusher configuration|pusher]] version of the same engine.<ref>Gunston, 1989, p. 156.</ref>