据国外媒体报道,洛克希德·马丁公司研制的SR-72隐身高超音速侦察机飞行速度达到的马赫数为5~6(飞行器在空气中的运动速度与该高度远前方未受扰动的空气中的音速的比值称为飞行马赫数.马赫数0.8为次音速,0.8~1.2为穿音速,1~5为超音速,大于5为高超音速),工程师认为高超音速技术可以用于研制下一代的客机(如图1),如果设计成功,将使得跨大西洋航线变得非常便捷,只要1 h就可以从伦敦飞到纽约. According to foreign media reports, Lockheed Martin SR-72 stealth hypersonic reconnaissance aircraft flight speed reached Mach number of 5 to 6 (aircraft in the air velocity and altitude that is undisturbed in front of the air The ratio of the speed of sound known as the flight Mach.Machine 0.8 for the subsonic speed, 0.8 to 1.2 for the sound speed, 1 to 5 for the supersonic, greater than 5 for the hypersonic), engineers believe that hypersonic technology can be used to develop the next generation Passenger aircraft (Figure 1), if designed, will make trans-Atlantic flights very easy and fly from London to New York within just 1 h.