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美国军方的X-5 1A“乘波者”极超音速喷气机采用具有革命性的超音速冲压喷气发动机,几秒内的速度便可达到每小时7242千米。如果这项技术能实现,未来的航空游客将无需忍受长途飞行之苦。从伦敦乘坐X-5 1A飞往纽约只需一个小时。不过,不久前美国空军表示,他们在进行的,旨在突破6马赫飞行速度的“乘波者”超高速飞行器试飞已经宣告失败。这种无人飞行器被设计以高达6倍音速的超高速飞行,在测试中的X-51A将附在一架B52轰炸机的机翼下方。当从加利福尼亚州莫哈韦沙漠的爱德华兹空军基地起飞的52轰炸机飞抵穆古角上空近1.5万米的高度
The US military’s X-5 1A “By-Wave” supersonic jet uses a revolutionary supersonic ramjet engine that can reach 7242 kilometers per hour in seconds. If this technology is to be achieved, future air travelers will not have to suffer from long-haul flights. It takes only an hour to fly from New York to London via X-5 1A. However, not long ago the U.S. Air Force said that the flight test of the “Byzantik” ultra-high-speed aircraft they were carrying out aimed at breaking the Mach 6 flight had failed. The UAV was designed to fly at an ultra-high speed up to six times the speed of sound and the X-51A under test will be attached to the wing of a B52 bomber. When a 52-bomber that took off from Edwards Air Force Base in the Mojave Desert of California flew to a height of nearly 15,000 meters above the mouth of Mughtip