Polish Aviation Museum

31-864 Kraków,
al. Jana Pawła II 39
phone: (12) 640 99 60,
(12) 642 40 70
e-mail: info@muzeumlotnictwa.pl

a cultural institution of the Malopolska Region

Małopolska – Kraków Region


Mecenas Muzeum

Kraków Airport

Instytut Techniczny Wojsk Lotniczych - sponsor restauracji samolotu Caudron  CR.714 Cyclone


Patroni Medialni

Skrzydlata Polska



Aircraft engine: RAF 3a Napier

RAF 3a Napier
Great Britain
inline engine
1914



Configuration12-cylinder V 60°
Coolingliquid-cooled
Displacement17.2 l (1,049.4 cu in)
Compression ratio5.3
Weight390 kg (860 lb)
Maximum power260 hp at 1,750 RPM

The engine was designed at the Royal Aircraft Factory based on the 8-cylinder RAF 1. A notable feature was that both intake and exhaust valves controlled by a single pushrod. Production of the new model was undertaken by Armstrong Whitworth and D. Napier & Son Ltd. The RAF 3a was the main production variant with increased bore compared to the original RAF 3 design.

260 examples overall were built by Napier & Son in addition to 29 manufactured by Armstrong Whitworth. The engine was fitted to the Airco DH.4 light bomber.

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Dofinansowano ze środków Ministra Kultury i Dziedzictwa Narodowego
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