加油机是支撑美国空军空中优势的重要组成部分,近二十年来,美国空军频繁征战于多场局部战争,虽牢牢掌握着制空权,但是作为坚强后盾的KC-135加油机疲于奔命,渐感力不从心。2004年3月,美国空军开始酝酿启动KC-X计划,目的是为空军研制新一代加油机,以替换目前的KC-135,并明确表示将采取公开竞标方式选择候选加油机。作为加油机市场的龙头老大,波音公司提出了自己的KC-767加油机,并为此投入了巨资,期望能够获得美国 Over the past 20 years, the U.S. Air Force frequently fought on many local wars. Although the KC-135 tanker was backed by strong backing, it was gradually losing its power. . In March 2004, the U.S. Air Force started to launch the KC-X project to develop a new generation of tankers for the Air Force, replacing the current KC-135 and making it clear that it will open bidding to select candidate tankers. As a leading tanker market leader, Boeing proposed its own KC-767 tanker, and invested heavily in this, expect to be able to get the United States