Nigerian investigators probing a loss of thrust in both engines of a Hawker 900XP have disclosed that one of the powerplants ...

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.

The system allows the pilot to apply forward or reverse thrust throughout the flight envelope. This way, the aircraft can accelerate from a hover like a conventional helicopter, engage the pusher ...