Has anyone ever tried to replace the rotors of a helicopter and install airplane wings on the body instead? - Quora
MV-22 Osprey | Military.com
Fly the Future Today - BLADE
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aircraft design - Why does this V-22's rotors rotate clockwise and anti-clockwise (the right and the left rotor respectively)? - Aviation Stack Exchange
Why did the half-plane, half-helicopter not work? - BBC News