近半个世纪以来,航空航天界中没有哪一项技术像高超音速技术那样,耗掉了几辈人的心血,却至今没有得到最终的成果.50年代末,美国X-15高超音速验证机的首次高超音速飞行试验,曾鼓舞人们采用吸气式发动机去利用空气中的氧;60年代,又开展了超音速燃烧冲压发动机等一批关键技术的研究,但美国的航天飞机却仍然在使用火箭发动机.1986年美国的国家空天飞机 Nearly half a century, none of the aerospace industry as hypersonic technology that consumes the effort of several generations, but so far did not get the final result of the late 1950s, the United States X-15 hypersonic verification machine Of the first hypersonic flight test, has inspired people to use suction engines to take advantage of the oxygen in the air; the 60s, but also carried out a number of key technologies such as supersonic combustion ramjet technology research, but the U.S. space shuttle is still in use Rocket engine. 1986 US national space plane