there is two problems with this plane because ive had a similar situation with a 2 chanel plane. NO.1 the wheels are way to small which means they have to spin faster which makes them more uncontrollble and they can get stuck in the tiniest of all gaps. NO.2 Have you checked to see if one of the wheels is tighter than the other? try this by moving them both with your fingers and if one needs slightly more strenght to move it then thats what the problem is. As the good wheel moves,the bad one stays in place and so the good wheel circles around it eventually forcing the bad wheel to move slightly. And so they do donuts.[sm=spinnyeyes.gif] Hope this helps!