Vedeneyev M14P Radial aero engine

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The Vedeneyev M14P is a Russian nine cylinder radial, four-stroke, air-cooled petrol engine which develops 360 hp. Its design dates from the 1940s, and is a development of the Ivchenko AI-14 engine. The M14PF is a 400 hp version of the M14P.
 
The induction system uses a gear driven supercharger and a carburettor of automatic mixture type. Power is transmitted to the propeller via a reduction gearbox.
 
The engine has a speed governor, carburettor, two magnetos, mechanical fuel pump, generator and oil pump. The engine remains fully operational during inverted flight. The engine is pneumatically started. The engine is left-turning (counter-clockwise) when viewed from the cockpit. This is opposite to the rotation to most Western aero-engines.
 
In recent times, the M14P has become increasingly popular in experimental aircraft designs such as the Murphy Moose, Radial Rocket, Pitts Model 12 and others. A factory modification to the supercharger gearing results in the M14PF engine developing 400 hp. Non-factory developments of the engine have it producing as much as 460 hp and these may be equipped with electric start and electronic ignition.
 
When operated in a certified aircraft the TBO (Time Between Overhauls) for the M14P engine is initially 750 hours and every 500 hours thereafter. On experimental aircraft the engines are often run to their complete 2250 hours life before overhaul[citation needed. This engine was used by the Yakovlev and Sukhoi Design Bureaus.
 
The M14-V26 version is exclusively developed for the Kamov Ka-26. "V" stands for vertolet (helicopter), "26" for Ka-26. Power output rated for 239 kW (325 HP) at take-off. The engine has no gearbox; the power is transmitted to the main reduction gearbox via interconnect shaft.