American Hypersonic Drone Quarterhorse Mk 1 Completes First Flight Aviation startup Hermeus recently conducted the first flight of its drone, the Quarterhorse Mk 1. The company aims to develop an unmanned aircraft capable of surpassing the SR-71’s speed record of 3,529.56 km/h, set in 1976. After reaching that milestone, the next goal is to achieve hypersonic speeds—defined as speeds exceeding Mach 5—though the developers […] Post American Hypersonic Drone Quarterhorse Mk 1 Completes First Flight at Root-Nation.com.

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