Vedeneyev M14PF

The Vedeneyev M14PF is a Russian nine-cylinder, four-stroke, air-cooled radial engine. The Russian National Team began asking for more power and the result was the M14PF in which the power is increased to 400hp by changing the supercharger gearbox so that the supercharger is turned at 10.5 times engine speed rather than 8.25. This therefore uses the same supercharger and other systems, but turns the supercharger impeller at an extremely high 30,000 rpm in order to produce the higher levels of boost necessary for greater power.

General characteristics

Type: Nine cylinder, four-stroke, air-cooled radial engine

Bore: 105 mm (4.13 in.)

Stroke: 130 mm (5.11 in.)

Displacement: 10.16 L (620 cubic inches )

Length: 923 mm (36.375 in)

Diameter: 985 mm (38.7 in)

Dry weight: 220 kg (485 lb)

Components

Supercharger: Centrifugal, single-stage, single-speed

Fuel system: Floatless carburettor

Fuel type: Minimum 91 octane Avgas

Oil system: Gear type pump

Cooling system: Air-cooled

Performance

Power output: 400 HP at 2,950 rpm