Hopefully not, it's foam, so it flexes quite well, and it's a high pitched flutter, like turbulence, but it only occurs during steep dives during 50% or more throttle, and during level flight when engine is cool, and batteries are fresh. It's still not something that is very "scale" or desirable visually. But it might be the nature of the beast... just wondered if anybody with that plane had experienced this, and had corrected it successfully.