King, I should of been more specific. With the plane flying at you and in to the wind. Pull up into a loop so the plane is in front of you. You will see the bottom of the plane. That puts the plane's right wing on your left side. You are correct about input needed. So, from the plane's point of view...if plane wavers to the right. Trim the rudder to the left. Or if the plane wavers to the left, trim the rudder to the right.

The "turn in" and "turn out" is yaw. Inside means toward the center of the loop either left or right. Outside means away from the center of the loop, left or right. Basically a slow roll. Keep in mind.... in a "perfect world"...... a loop should only require elevator input with the stick pulled back to a certain position and that position should not change through out the loop with out any other input needed. This style of trimming is to get a certain plane to preform as close to perfect as it can in the "real world".