直升机与固定翼飞机从设计原理到飞行性能均有显著差异,其特有的垂直起降、空中悬停、低空低速的机动性,决定了直升机在应用领域的广泛性。从世界范围看,民用直升机的应用是与国民经济建设和社会发展紧密联系的。当前,我国正处于经济持续增长的重要发展时期,随着国民经济建设和 Helicopters and fixed-wing aircraft from the design principles to the flight performance are significantly different, its unique vertical takeoff and landing, aerial hovering, low-altitude low-speed mobility, determines the helicopter in the field of application of extensive. From a global perspective, the application of civilian helicopters is closely linked with the national economic construction and social development. At present, our country is in an important period of sustained economic growth. As the national economy and