Helicopter? Close, but not quite, since the rotor blades are fixed-pitch. We’ll just go with “monocopter” for now and sort out the details later for this ducted-fan, thrust-vectored UAV.

In 1972, he began marketing his design: an eight-place vertical/short-takeoff-and-landing jet with vectored thrust ... whose CH-46 helicopters lumbered along at 155 mph; duPont was promising ...