Royal Aircraft Factory RAF 2

The RAF 2 was a British air-cooled, nine-cylinder radial engine developed for aircraft use just prior to World War I. Iit was designed and built by the Royal Aircraft Factory, and first run in October 1913.

Applications:
Royal Aircraft Factory B.E.8

Specifications:
RAF 2
Type: 9-cylinder, single-row, radial engine
Bore: 3.94 in (100 mm)
Stroke: 5.51 in (140 mm)
Displacement: 604.6 cu in (9.9 L)
Valvetrain: Poppet valve
Cooling system: Air-cooled
Reduction gear: 0.563:1, geared epicyclic, right-hand tractor
Power output: 120 hp (90 kW)
Specific power: 0.2 hp/cu in (9.2 kW/L)