Mach 5 aircraft cutting intercontinental travel to under two hours.

Speed is the binding constraint on how civilization coordinates across continents. The fastest commercial aircraft today fly at roughly the same speed as in 1970. Hermeus is building Mach 5 aircraft for defense and commercial markets — delivering what the jet age did for civilization, but at speeds no commercial aircraft has ever reached.

Turbine-based combined cycle propulsion has matured to where hypersonic aircraft are an engineering challenge, not a physics challenge. Hermeus is exploiting that window before larger incumbents can organize around it.