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This Mach-5 engine will do what no other can

Hermeus is building the world's fastest commercial aircraft. And we got to tour their hypersonic flight lab.

The aircraft startup Hermeus is aiming to do something unprecedented: build an aircraft that can take off from sea level, hit hypersonic speeds, and land to be reused, all while using one jet engine.

To achieve that goal, Hermeus is experimenting with a demonstrator aircraft called The Quarterhorse — a small single-engine autonomous vehicle designed to t…

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