为了使作战飞机能执行远程作战任务和延长留空时间,早在本世纪20年代国外就已开始研究飞机空中加油技术了。1923年美国陆军航空队率先用两架德·哈兰H4B侦察机第一次尝试用软管进行空中加油,增大续航时间获得成功,从而揭开了空中加油技术的序幕。空中加油技术在军事上的 In order to enable combat aircraft to carry out long-range combat missions and to extend the clearance time, aircraft aerial refueling technologies have been studied abroad as early as the 1920s. In 1923, the US Army Aviation Corps pioneered air refueling technology with the first attempt of two German Harlan H4B reconnaissance aircraft to use air hoses for hoses to increase air life. Air refueling technology in the military