DARPA has selected six companies to take concepts for a shipborne vertical-takeoff-and-landing (VTOL) uncrewed aircraft through a preliminary design review (PDR) on the way to flying a planned X-plane ...

In the early 60s, there were several studies into creating the first mass-produced vtol aircraft. A plane that could operate like a jet, and then at the same time, land vertically where needed. Bell, ...