Scramjets engines can not start until the plane flies faster than the speed of sound.
超高速冲压喷气发动机引擎在飞机超过音速的情况下不能启动。
But Joe Vogel, the project manager at Boeing, says the technology has “crossed over the threshold” into hypersonic flight. He reckons that scramjets might one day power civilian aircraft.
但是波音公司项目经理乔•沃格尔说，超音速飞机在技术上已经取得了重大突破，他预计超然冲压发动机将来也可能会应用到民航客机上。
But Joe Vogel, the project manager at Boeing, says the technology has “crossed over the threshold” into hypersonic flight. He reckons that scramjets might one day power civilian aircraft.
但是波音公司项目经理乔•沃格尔说，超音速飞机在技术上已经取得了重大突破，他预计超然冲压发动机将来也可能会应用到民航客机上。
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