The RAF 3 is a British liquid-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 Armstrong Whitworth and Napier & Son. The RAF 7 was a high compression version of the same engine.

Variants

1. RAF 3

2. 1914 - Prototype engine, 200 horsepower (150 kW).

3. RAF 3a

4. 1914 - Main production variant, increased bore, 260 horsepower (194 kW). 29 built by Armstrong Whitworth, 260 built by Napier & Son.

5. RAF 7

6. 300 horsepower (224 kW) high compression version with high-lift camshafts.

Applications

• Airco DH.4

• Royal Aircraft Factory R.E.7

Specifications (RAF 3a)

See also

References

Notes

Bibliography

• Gunston, Bill. World Encyclopaedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989.

• Lumsden, Alec. British Piston Engines and their Aircraft. Marlborough, Wiltshire: Airlife Publishing, 2003. .