==Cleanup== 

 I've added cleanup tags because I feel the author's got a chip on their shoulder and they're constantly comparing tiltrotors to helicopters and constantly telling us that helicopters are overall better. While it would perhaps be valid to have a "comparison with other V/STOL aircraft" section, it's inappropriate in the main segment - things like the second and third paragraphs are what's needed here - facts and description so we can get an idea of what a tiltrotor is; not comparison with other aircraft, and far less conclusions on these comparisons (again, at least not in the main body of the article).