Hermeus completes first flight of Quarterhorse Mk 2.1; begins F100‑powered supersonic test campaign in New Mexico
Hermeus has completed the maiden flight of its Quarterhorse Mk 2.1, an uncrewed supersonic demonstrator powered by a Pratt & Whitney F100‑229, and has begun a supersonic flight‑test campaign from New Mexico’s Spaceport America. It is the company’s second new prototype to fly in under a year.