Tests of the Hermeus Quarterhorse Mk. 1 at Edwards AFB, California, will pave the way for a follow-on full-scale turbine-based, combined-cycle-powered version.
Credit: Hermeus
High-speed air-breathing propulsion has been the exclusive purview of traditional engine-makers since the birth of the jet age. But as 2025 dawns, it is the emerging generation of startup vehicle and engine developers that is making news. Showing marked progress is Atlanta-based hypersonic aircraft...
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