The aircraft under development is planned to fly at Mach 5 with a range of 4,600 miles (7,400 km).[4] The company claims to have designed, built, and successfully tested a Mach 5 engine prototype in the span of 9 months.[5] In August 2020, Hermeus received a $1.5 million contract from the United States Air Force to develop their proposed aircraft to enter and serve the American presidential fleet in the future and function as a possible Air Force One.[6]