“Hermeus will be leveraging autonomous and reusable systems, ruthlessly focused requirements, and a hardware-rich program,” the company said in a news release. Hypersonic glide vehicles (HGV) are launched from a rocket before gliding to a target.7 Hypersonic cruise missiles are powered by high-speed, air-breathing engines, or scramjets, after acquiring their target. The company has already built and tested a subscale hypersonic engine prototype and is working on a full-scale engine demonstrator, Aviation International News reported in November 2020. The first Quarterhorse aircraft will be unmanned to eliminate the risk of having a human pilot fly an experimental aircraft and allow the company to move to flight testing earlier, Skyler Shuford, Hermeus’ chief operations officer, said in a video posted to Twitter. Hypersonic vehicles fly faster than five times the speed of sound and can enable a new class of flight vehicles that enable faster access to space, rapid military response at long range, and faster means of commercial air travel. For instance, the company is tasked with building three prototypes of its Quarterhorse aircraft, testing a full-scale reusable hypersonic propulsion system and providing data to the Air Force that it can use in future war-gaming efforts. Misra, in Lightweight Composite Structures in Transport, 2016 12.4 Hypersonic air-breathing propulsion.
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