(from the article `helicopter`) The first group consists of two types, the most important of which is the tilt-rotor aircraft, such as the Bell/Boeing V-22, in which a helicopter ... In a special category is the tilt-rotor aircraft, which can operate as a helicopter or rotate its engines and fly like a fixed-wing airplane. A ... [2 r...
Found on
http://www.britannica.com/eb/a-z/t/51
Type of vertical takeoff aircraft, also called a convertiplane
Found on
https://www.encyclo.co.uk/local/21221
No exact match found.
