My student just finished building his new cub ARF. i took it off for maiden flight and immediatley had a problem. the model seriosly was trying to roll itself over to the left. it took absolute full right trim to fly it straight. i flew it around, and it was a joy to fly. i did some low, slow passes to make it loof scale and it was awsome. i landed the plane and shut it down. I noticed his ailerons were not centered. They deflected a good amount to fly straight. We did a lateral balance check and it was fine, CG is dead on, but that wouldnt affect roll. I am thinking the wing might be warped, we will check that soon. He has a saito .56 four stroker in it, plenty of power and sounds so awsome! i helped him with assembly and setup so i know it was built right.
Any ideas as to why the plane wants to roll left hard? i am thinking wing warp, is there any easy way to check for that without an incidence meter?
Thanks all for help!

sean

Mine has flown straight and level from day one.
Must have washout in the right tip. Easy to check by looking across the top of wing from one tip to the other. As you know, a heat gun to the film on the underside outer panels can shrink the warp out of the wing.

Some times you can see the warp by looking at it from the leading edge while your buddy holds it up at eye level. If it took full trim to level it, the warp should be visible. If it is warped and the light is right, one side will look flat and you will be able to see part of the top or bottom surface on the other side.

Was the wing saddle a tight fit on yours? I noticed on mine that it was really tight. You might make sure that the wing is sitting down in the saddle properly, and is level (mine wasn't). Overall this kit was really sweet. I have a magnum 61FS in mine and I love the way it sounds. Yesterday I got in 2 great flights, and the park employees where I fly came down to watch. They said, "It even sounds like a real plane!"

Jess

I can't offer any more possible solutions than what has been offered, I can say that mine flys great, its my favorite plane. Handles well on the ground also

alright, it not my plane, my students. he actually just put a post on it in the beginners forum. next time i see him i will check the saddle fit. thanks all!

sean

I think i found my trouble guys i posted it in BEGINNERS... STRAIGHTEN UP AND FLY RIGHT NO LEFT ........THANKS FOR YOUR HELP AND I WILL KEEP U POSTED

If you have split elevator one side may be tweeked up or down causing it to roll to that side.