空中加油机的运用,有效地增大了飞机的航程、作战半径,延长了留空时间,大大提高了航空兵的远程作战能力。因此,空中加油机倍受各国的重视。自1923年,美国陆军的一架单引擎DH-48B飞机在飞行中由另一架DH-48B飞机用软管以自流方法对它进行了两次加油以来,空中加油已走过了70多年的发展历程,空中加油技术也已日趋成熟。迄今,世界上已有22个国家拥有空中加油机,其中拥有加油机最多的国家是美国和俄罗斯,其次是英国、法国、以色列、沙 The use of aerial tankers effectively increased the voyage and combat radius of the aircraft, lengthened the clearance time and greatly enhanced the long-range combat capability of the aviation units. Therefore, the tanker is much valued by all countries. Since 1923, a single-engine DH-48B from the U.S. Army has been refueled twice by hoses with another DH-48B aircraft hose during flight. Over 70 years have passed since the refueling Development process, air refueling technology has matured. So far, 22 countries all over the world have air refuellers, of which the United States and Russia have the largest numbers of tankers, followed by Britain, France, Israel, Saudi Arabia