Mach 4.5, in case you were wondering, is 4.5 x the speed of sound. For reference, the now defunct Concorde flew at up to Mach 2. BBC News reports on Airbus’s patent for a hypersonic airplane:
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Airbus has won a patent for a hypersonic passenger plane which could potentially fly from London to New York in an hour.
Dubbed Concorde 2.0, the jet would be capable of flying more than four times the speed of sound.
Documents lodged with the US Patent Office refer to an “ultra-rapid air vehicle and related method for aerial locomotion”.
So are we on the verge of a revolution in air transport?
How does it work?
According to the documents, the jet would reach speeds as high as Mach 4.5, or four-and-a-half times the speed of sound. That compares to Mach 2 for Concorde.
The patent application says that the aeroplane would use a variety of engines that would serve different purposes and power would come from hydrogen stored onboard.