you'll get the turn made, but the plane will look as though it is skidding tail slightly down and inside the turn's path. in a bank, a little bit of rudder holds the tail up on the turn's path. newer computer radios can be programmed to input a ;little rudder when ailerons are used to bank the plane. it's handy,....but it is also considered by some to be cheating the pilot out of learning how to actually fly the plane. my opinion is that it does, but if you are experienced, why not take advantage of making flying easier and more enjoyable. as long as you know you can fly the plane traditionally, it doesn't hurt the learning curve. that said, learning right, is the way to go when you are starting out, because it is part of the fundimental understanding of controlling the plane.