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道格拉斯X-3“尖刀”飞机于1951年出厂,因其前卫的外形而很容易被认为是当时飞得最快的飞机,但外表往往具有欺骗性。由道格拉斯公司研发部门在20世纪40年代末研制出来的X-3飞机担负着以高于2马赫的速度进行超音速飞行的使命。若能圆满完成任务,将极大地有利于美国空军和国家航空咨询委员会。1952年10月,“飞行尖刀”进行了首飞。美国人借此机会也对小展弦比机翼、新型航空材料
Douglas X-3 “Knife” aircraft factory in 1951, because of its avant-garde shape and can easily be considered as the fastest flying aircraft at the time, but the appearance is often deceptive. The X-3, developed by Douglas R & D in the late 1940s, is tasked with hypersonic flying at Mach 2 speeds. Successful completion of the mission will greatly benefit the U.S. Air Force and the National Aviation Advisory Committee. October 1952, “Flying Knife ” made its first flight. Americans also take this opportunity to small aspect ratio wing, new aviation materials