Quadcopters are great for maneuverability and slow, stable flight, but it comes at the cost of efficiency. [Peter Ryseck]’s Mini QBIT quadrotor biplane brings in some of the efficiency of fixed ...

And that is exactly what the VTOL Experimental Aircraft (VTOL X-Plane) initiative set out to do in 2014. In the course of the program, all of the competing developers opted to use an uncrewed aerial ...