How close are we to hypersonic travel?

The hypersonic flight could advance travel in ways we haven't seen since the invention of flight itself. But flying at hypersonic speed isn't easy. It presents incredible engineering and logistical challenges. So how close are we to hypersonic travel?


Hpersonic flight helloearthSupersonic speed, basically supersonic speed is traveling faster than the speed of sound (Mach 1) or above 1236km/h at sea level. Supersonic speed is really really fast but hypersonic speed is in a league of its own.

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