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美国宇航局 (ＮＡＳＡ)曾二次出资开发高速商业飞机技术。第一次是在 6 0年代后期 ,第二次是在 80年代后期。 1989年ＮＡＳＡ启动了时速为 2 4马赫高速民用飞机的研究工作 ,计划在 10年内投资 10亿美元用于此项工作。该项工作有三个方面的潜在意义 :一是可以提高飞机的时速 ;?
NASA has twice funded the development of high-speed commercial aircraft technology. The first was in the late 1960s and the second was in the late 1980s. In 1989, NASA launched a research project on 24 high-speed civil aircraft at a speed of Mach 4 and planned to invest one billion U.S. dollars in this work in 10 years. The work has three aspects of the potential significance: First, you can improve the aircraft’s speed;