UAV Development & Drone Programs   Hypersonic   Aircraft Manufacturing (OEMs)  

Hermeus unveils air-launched Ramjet-X for low-cost Mach 4 flight testing

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Hermeus has introduced Ramjet-X, an expendable ramjet-powered vehicle designed to provide sustained high-Mach flight testing as a service. The vehicle will be released at Mach 3 from the company’s reusable Quarterhorse unmanned supersonic aircraft and cruise near Mach 4, eliminating the need for a rocket booster.

Discovered 2026-09-09T03:50:33.041012-07:00 | 2026-09-09T03:50:33.041012-07:00

Briefing

What Hype is tracking

  • Ramjet-X adds a proposed lower-cost, air-launched option for sustained high-Mach testing without a rocket booster.
  • The concept links Hermeus’ reusable Quarterhorse aircraft with an expendable test vehicle, creating a potential flight-testing service model for high-speed aerospace programs.
  • The stated operating profile—release at Mach 3 and cruise near Mach 4—places the vehicle in a demanding test regime relevant to hypersonic technology development.

Reported By

Aerospace Testing Intnl interestingengineering.com thedebrief.org aero-defence.tech Defense Daily Air Data News
Sources Tracked
8
First Seen
2026-09-09T03:50:33.041012-07:00
Latest Update
2026-09-15T02:50:47.524223-07:00
Coverage
Aviation

Sources

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