Company aims to achieve supersonic speed with its Quarterhorse Mk 2.1 before advancing to more powerful aircraft.
The Defense Innovation Unit achieved a successful suborbital launch of a hypersonic test platform that demonstrated sustained ...
An artist's impression of the Polaris Spaceplanes Hypersonic Test and Experimentation Vehicle (HYTEV) research vehicle. The first flight is anticipated before the end of 2027. (Polaris Spaceplanes) ...