Aerospace brand Virgin Galactic has unveiled a concept for a high-speed passenger aircraft called Mach 3, which could travel at three times the speed of sound.
The Mach 3 aircraft would be able to carry between nine and 19 passengers and fly at an altitude above 60,000 feet (18,300 metres).
Featuring triangular delta wings, the aircraft would be capable of travelling at Mach 3, or 3704 kilometres per hour, which is three times the speed of sound.
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