Helo's can autorotate, tiltrotors can't. Fixed wings need ground effect to cushion the landing. Rotating the wings down, if there is even time, puts the prop/rotors in a position to hit first and cause drag and forward pith even though they are meant to splinter. My electrician was a helicopter mechanic in the Marines when the V-22 came online and he was warned to stay away from them.
Pat
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Last edited by PSM; 09-30-2017 at 21:37.
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