The amount of right thrust needed is usually determined by pulling up into a vertical climb. But even with the correct amount, it does not prevent the pilot from having to use rudder on take-offs or in maneuvers where the aircraft is changing direction in pitch.

For instance, when doing inside loops, the model will track better with a touch of right rudder.
Outside loops, will require a touch of left rudder. Now loops are the most basic maneuver, and yet hard to do well since all four basic controls are involved.