THOR: Transformable HOvering Rotorcraft

This hybrid unmanned aerial vehicle combines the range and speed of a horizontal fixed-wing platform with the hovering and manoeuvrability of a rotor-wing. Highly structurally efficient, all aerodynamic surfaces and propulsion systems are fully utilised in both flight configurations. It can fly like an aeroplane or flip its wings to mimic the autorotation of two-bladed samara seeds.