Hermeus Quarterhorse!
The Mach 5-capable (3,000mph) Quarterhorse will validate the company’s proprietary turbine-based combined cycle (TBCC) engine, which is based around the GE J85 turbojet engine.
By the end of the flight test campaign, Quarterhorse will be the fastest reusable aircraft in the world and the first of its kind to fly a TBCC engine.













