I have a Great Planes "Gene Soucy" Extra 300S ARF and I love it but I do have a one problem I need help with. I seem to be having a roll out problem when I apply a lot of elevator. I will try to describe some examples are:

1. When I perform a simple inside loop from straight and level flight with small to moderate up elevator it performs great. If I do the same thing and add more than 2/3 elevator it will do a "little bump" (quick up and down motion) and then try to perform the loop but roll out to the left when about a 1/3 of the way or so.

2. During tight maneuvers using a lot of control service movement I get a lot of tip stalling from this. If I'm knife edging and want to performa knife edge circle, it rolls out on me as I add the elevator to the mix.

I have checked the elevator alignment, wing and stab incidence, engine thrust line and I can't come with anything. I feel it is getting some sort of turbulance off of the wing but that is as far as I have gotten. Any help will be greatly appreciated.


k9