Overview
- The Defense Innovation Unit has modified its contract to add $159 million to Hermeus, raising the DIU program total with the company to $219 million to fund more flight tests and payload‑release demonstrations.
- Hermeus recently pushed its Quarterhorse Mk 2.1 into supersonic flight, reporting a top speed of about Mach 1.21 during the company’s early test campaign.
- The new work will finance building and flying Mk 2.2 and Mk 2.3 prototypes and a series of focused experiments with the Air Force and Navy to prove carry and safe release of weapons or sensors at high speed.
- Engine, thermal and structural risks remain central challenges: Hermeus has used an RTX F100 for early runs while planning to integrate its Chimera combined‑cycle engine for sustained higher‑Mach flight, and teams must solve shock‑wave, bay‑aerodynamics and power problems before routine Mach‑3 operations are viable.
- If the tests validate performance and production pathways, services see Quarterhorse as a lower‑cost, fast strike or loyal‑wingman option that could shorten response time to distant targets and shape future acquisition choices.