RE: Top Flite DC-3 or any person who has a twin and take off issues.
Are both engines coming up to speed evenly? You could have the left engine bogging down a bit and the right engine will want to push it left because it's revving up quicker. The fact that it's a tail dragger could have something to do with it, but I have a tricycle gear twin that did the same thing until the engines were balanced out