Tiltwing

A tiltwing aircraft is a type of vertical takeoff and landing (VTOL) aircraft design. It achieves vertical flight by rotating its engine-nacelles, which contain the propellers or rotors, upwards to act as rotors. For forward flight, the nacelles are rotated forward, effectively turning the propellers into conventional airplane propellers. This allows the aircraft to combine the hover capabilities of a helicopter with the speed and range of a fixed-wing aircraft. Tiltwing designs generally require a complex mechanical system to control the tilting nacelles and maintain stability during transitions between vertical and horizontal flight. Compared to other VTOL designs, tiltwings are often considered more aerodynamically efficient in forward flight.