Sorry, I don't know what a slinger is. My real flight is a older version.

Most trainers made now are three channel to help ease the learning curb. The thought is, you first need to fly RC then after that you will want to upgrade to a higher performance 2nd aircraft that flys with all four channels. I agree mostly. Many experienced pilots can't explain exactly what the rudder and ailerons have to do with each other, or why the rudder banks the aircraft in a turn. When a aircraft is equiped with ailerons the rudder is used to counter act ADVERSE YAW, also called Aileron drag. I don't like to type too much so the skinny is, the aileron that goes down creates more DRAG than the one that goes up. This extra drag pulls (YAWS) that wing back while rolling it in the desired direction (SLIP). Rudder is used to keep the turn coordinated (relative wind striking the airplane straight). too much rudder and you have a SKID, dangerous unless you like spins, and beginers don't do spins, hence no ailerons for beginners, makes things easier. Why the plane banks using rudder only? When the rudder yaws the plane it accelerates the outside wing forcing the relative wind to travel over it faster, thus creating more lift than the inside wing which is de accelerated , less relative wind, less lift. Outside wing up, inside wing down, bank is made. Too much rudder can de accelerate the inside wing so much the wing can stall and snap roll. Bad thing for beginners. Most three channel trainers don't have a big enough rudder to do this, so they are easy to fly with just the rudder, and you still get a nice looking banked turn! Use a model to help visualize this stuff. If anyone wants to learn about relative wind, let me know. Relative wind and wind is some of the most important stuff to understand in flight.