how to trim properly

[Bolelas]

Originally Posted by rpgielow

The correct use of rudder trimm is based on the ball. Keep the ball centered for each phase of flight and you are doing well.

Aileron trimm on real world aircraft is used only for fuel inbalance. So for IL2 aircraft you can use aileron trimm to keep a straight flight path when your wings are damaged, producing more lift in one side than another.

Thanks a lot, thats my answer!
Anyway, thanks to all that posted, they also added precious info.