[Admin: Thread split from: https://www.metabunk.org/posts/46747 Or is it just friction? Friction creating heat, just like an engine. I don't know, but I know airplane wings don't get hot. I'm just guessing here. It's not static. Static looks like the pic. Static from a rotor wing is really colorful and pretty and I can't believe there aren't better pictures than this popping up on google images. I had a job in the army that had me standing under helicopters that were hovering so low I could touch them (they were that low so I could touch them), but I never took pictures. How's my science sound, Mick?