I have a Blade mCPX heli which has a weird pulsing wobble when flying inverted, the tail of the heli bobs up and down, it seems fine when flying the right way up!
Please see the video clip here
http://www.youtube.com/watch?v=8QZFMKee6z0
It is most noticeable at 1:02, 1:08 and 1:40.
I have a metal swashplate fitted.
Any ideas what might cause this please?
Thanks for any replies.