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1引言二次大战中,各种飞机用的发动机均是活塞式发动机。这种发动机工作时只输出扭矩,不能直接产生推进飞机前进的推力或拉力,因此需采用空气螺旋桨(简称螺旋桨)作为推进器,螺旋桨由发动机带转后,在桨叶上产生推进飞机前进的拉力。这种由活塞式发动机与螺旋桨组成的飞机动力装置,在二战中得到了极大的发展,发动机最大的功率达到3500 kW左右,发动机的耗油率低的约为0.28 kg/(kWh),发动机的功率重量比(功率/重量)达到2 hp/kg,成为战斗机、轰炸机、运输机等的动力,在战争中发挥了重大作用。但是,它却限制了飞机飞
1 Introduction World War II, a variety of aircraft engines are piston engine. This kind of engine only outputs torque when it works, and can not directly generate the thrust or pulling force to advance the aircraft. Therefore, an air propeller (referred to as a propeller) is used as a propeller. After the propeller is turned by the engine, a pulling force is generated on the propeller to propel the aircraft . This kind of aircraft power plant composed of piston engine and propeller got a great development in World War II. The maximum power of the engine is about 3500 kW, the engine fuel consumption is low about 0.28 kg / (kWh), and the engine The power to weight ratio (power / weight) of 2 hp / kg became a motive force for fighters, bomber planes and transport aircraft and played a major role in the war. However, it limited the plane to fly