My sons and most people since the beginning learn to fly RC with a 3 channel plane like a L19. Steer with the rudder, altitude with the elevator and speed with a throttle.
Of course, me being the bozo jumped right in with 4 channel where you're using ailerons for turning, a whole different animal. So almost every attempt at a turn ended with me spilling lift off the wing and barreling in.
What the computer Tx did was allow me to automatically add rudder in with the aileron to turn as well as roll, but also program the sticks to be less sensitive around neutral. When looking up while holding a radio in your hands moving two sticks, it's hard to go in one direction without some drift of the stick in the other direction. So if I'm sliding my thumb up a bit to make the plane go down, there's a good chance I'll push or pull it to one side as well, which causes the plane to roll.
There's a great point every veteran will tell you first thing about what to do when flying towards you that is nearly fail safe to remember to do the opposite control input. Unfortunately, I can't remember it. :hmmm
