Startup Hermeus is developing hypersonic propulsion system for their Quarterhorse and Darkhorse vehicles. This could be achieving mach 5 speeds in 2026 to 2027. Quarterhorse Development Timeline: Mk 1: The first flyable version of Quarterhorse, Mk 1, is set for flight tests later in 2024. These tests will focus on high-speed takeoffs and landings Mk ...

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Link :
https://www.nextbigfuture.com/2024/08/hypersonic-drones-by-2026-2027.html