Hypersonic Hermeus Project Moves Ahead With New Funding Ever heard of the Hermeus Project? This is a hypersonic executive aircraft...yes hypersonic, envisioned -at this stage- for U.S presidential travel. The Mach 5 aircraft won a contract from the United States Air Force after its scratch-built engine proved to be more than promising. The scratch-built powerplant was successfully tested in February. Hermeus was formed back in 2018. In the space of supersonic contenders for executive jets there is Aerion and BOOM supersonic but Hermeus stands out as one of the premier contenders in the hypersonic category.