Originally Posted by
Appowner
My question would be, How far over is he banking it? Think knife edge. Is he banking it so far that he's really doing something more akin to a knife edge? All be it a poor one. Which is another reason why he needs to have someone experienced flight test his model.
His question was "Do you have to give a plane right rudder to make a left banking turn ...?" The sensible answer to that question is "No." I'll concede that opposite rudder can sometimes help in a knife-edge or near-knife-edge turn, but if that's what a beginner is doing the best advice is "Don't bank that much." When beginners make turns that steep, they usually turn into an unintentional split-S, followed by a crash unless they're on a trainer cord.
He certainly does need in-person help from an experienced flier. I have known people who have taught themselves to fly, though they tend to go through several models on the way.