Hi everyone. Help needed!.
I also posted this question in the pattern forum as it is a pattern plane, however it is aerodynamics thats probaly my problem.
When I pull in up elevator my plane snaps to the right. Any ideas on where to fix problem anyone?. When Im inverted and push down elevator it seems to track okay.
It just uses one servo for both elevator halves, with a "y" joint in the pushrod.
I have adjusted one elevator up, and down in relation to the other one, and that seems to make no difference, it always snaps to the right when loading up the elevator. Recently I just relocated the elevator servo right back in the tail of the plane, so its now a direct connection from the elevators to the servo, via a 4/40 rod. This hasnt helped at all!.

I've also tried putting some weight in the left wing tip, (about 20grams) that did not help either.

Now I will re-hinge one aileron, as one of the hinges has broken, could this be the problem?
The aileron still works fine, just the hinge closest to the centre section is broken, I have some tape on it and have been flying like this for months. I will re hinge and test, but I cant see this being the problem?.

Also the wing seems very weak, as in esily flexed, could this be my trouble? maybe one wing flexes more than the other when I pull in up elevator?. Both sides appear to be just as flexy.

What about CG, could this cause this problem? I have played around strapping weights on here and there but to no avail so far!.


The harder I pull in up elevator the worse it is, eg: slow speed pulling in up will just break, roll to the right, medium speed will cause full snap(maybe more barrell) roll, its scary stuff.

Its a Flair Swallow with an OS91FX.

Basically I'm just looking for suggestions, cause I have run out of idea's!.
Thanks Guys.