Hermeus Quarterhorse Mk 2.1 Reaches Supersonic Speed (heise.de)

• Quarterhorse Mk 2.1 reached Mach 1.21 on third flight over White Sands
• Powered by Pratt & Whitney F100 engine, size comparable to F-16
• Hermeus plans Mk 2.2 and Mk 2.3 prototypes; Darkhorse targets Mach 5

"The unmanned hypersonic aircraft Quarterhorse Mk 2.1, developed by US company Hermeus, broke the sound barrier on its third flight, reaching Mach 1.21. The test was conducted over the White Sands Missile Range in New Mexico. The successor Mk 2.2 is already under construction. Hermeus follows a rapid prototyping approach with one aircraft per year."