2016年,全球多个国家都在致力于继续发展空中加油机,有的在开展新机型的研制,有的进行了新技术试验,有的还挖掘了新的需求以牵引装备发展。其中,美国、俄罗斯、欧洲、巴西等国家和地区都在继续推进新型加油机的研制;欧洲在试图突破为直升机空中加油的技术的同时,还着手发展硬管空中加油技术;美国海军把X-47B无人舰载机项目调整为舰载隐身无人加油机的项目,而美国空军则提出了对大型隐身 In 2016, many countries all over the world are devoting themselves to the continuous development of aerial tankers. Some are carrying out development of new models, some have experimented with new technologies, and some have also tapped new demands for the development of traction equipment. Among them, the United States, Russia, Europe, Brazil and other countries and regions are continuing to promote the development of new tanker; Europe in trying to break through the helicopter air refueling technology at the same time, also embarked on the development of rigid air refueling technology; the United States Navy to X- 47B unmanned carrier aircraft project to adjust for the ship stealth unmanned tanker project, the United States Air Force proposed a large stealth