What Happened
Private US Company Reaches Mach 1.21 In Industry First
Hermeus, a high-speed aircraft maker, has successfully flown its Quarterhorse Mk 2.1 demonstrator aircraft above supersonic speed, reaching a top speed of Mach 1.21. This milestone marks the first time a privately funded, uncrewed aircraft in the US has achieved supersonic speed. The aircraft is powered by a Pratt & Whitney F100 engine. The achievement was reported by Aviation Week.