Too big and too complex.  Just like the Osprey.<p>But Canadair has it all figured out.  The CL-84 was a tilt-rotor, tilt-wing aircraft that was landing troops on US carriers 40 years ahead of the Osprey.  It probably had 1&#x2F;100th the part count.<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Canadair_CL-84" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Canadair_CL-84</a>