|Type||Radial aero engine|
|Manufacturer||Motorstar, Bacău, Romania|
|Developed from||Ivchenko AI-14|
The Vedeneyev M14P is a Russian nine cylinder, four-stroke, air-cooled, petrol-powered radial engine. Producing 360 hp (268 kW), its design dates from the 1940s, and is itself a development of the Ivchenko AI-14 engine. The M14P has recently become increasingly popular in experimental aircraft and kit designs such as the Murphy Moose, Radial Rocket, Pitts Model 12, and others. Historically, the engine has been used extensively by the Yakovlev and Sukhoi Design Bureaus.
The M14PF is a 400 hp (298 kW) version of the M14P.
 Design and development
The engine's intake system uses a gear driven supercharger and an automatic-mixture type carburettor. Power is transmitted to the propeller via a reduction gearbox.
In addition to the carburettor, the engine has a speed governor, two magnetos, mechanical fuel pump, generator, and an oil pump. It is started pneumatically, and remains fully operational during inverted flight. Compared to most Western aero-engines, which turn to the right (clockwise) when viewed from the cockpit, the M14P rotates to the left (counter-clockwise).
A factory modification to the supercharger gearing results in the engine producing 400 hp, while non-factory modifications have it producing as much as 460 hp. Such non-factory engines may also incorporate other upgrades, such as electric starters and electronic ignition.
When operated in a certified aircraft, the TBO (Time Between Overhauls) for the M14P engine is 750 hours initially, and every 500 hours thereafter. On experimental aircraft, the engines are often run to their complete 2250-hour design life before overhaul.
The M14-V26 variant has been developed exclusively for the Kamov Ka-26, where "V" stands for vertolet (helicopter) and "26" for Ka-26. Power is rated at 239 kW (325 HP) for take-off. The engine has no integral gearbox; instead, the power is transmitted to the main reduction gearbox via an interconnect shaft.
- Altitude Radial Rocket
- Bear 360
- Culp Special (Steen Skybolt variant)
- Kensgaila VK-8 Ausra
- Kimball McCullocoupe
- Murphy Moose
- Pitts Model 12
- PZL 104 Wilga 35/A (WilgaBeast - Experimental Modified)
- PZL-105 Flaming
- Slepcev Storch
- Sukhoi Su-26
- Sukhoi Su-29
- Sukhoi Su-31
- Yakovlev Yak-18T
- Yakovlev Yak-50 (trainer)
- Yakovlev Yak-52
- Yakovlev Yak-54
- Yakovlev Yak-55
 Specifications (M14P)
Data from Motorstar
- 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: 924 mm (36.4 in)
- Diameter: 985 mm (38.7 in)
- Dry weight: 214 kg (472 lb)
- 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
- Reduction gear: 0.658:1, left-hand tractor
- Power output: 360 hp (268 kW) at 2,900 rpm
- Compression ratio: 6.3:1
 See also
- Related development
- Related lists
- Motorstar M-14P specifications Retrieved: 27 July 2012
- YAK-55M Operator Handbook
- M14 Log books