The power equipment used in unmanned helicopter can be divided into three categories: piston uav engines, vortex shaft engine and current power system.Among them, piston engine is the most important power device of unmanned helicopter.Due to the high requirement of power to weight ratio of unmanned helicopter engines, its working environment is very harsh. However, the development of China's unmanned helicopter started late, especially in the field of unmanned helicopter piston engines, there are no mature products.
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