US’ Hermeus supersonic jet breaks sound barrier at Mach 1.21 in high-speed flight test (opens in new tab)

On Monday, the Atlanta-based aerospace company Hermeus confirmed a key flight milestone after its Quarterhorse Mk 2.1 aircraft broke the sound barrier during testing in New Mexico. The uncrewed plane reached Mach 1.21 on its third flight, which took place at Spaceport America in the restricted airspace above White Sands Missile Range. Mk 2.1 achieved […] The post appeared first on <a href="