ORIGINAL: Howard
The biggest impact on left yaw, caused by the engine, is at high power and low airspeeds - an example is during take off. As the plane accelerates, picks up speed, the impact is reduced. The answer to your question is that the amount of right rudder needed to keep the ball in the center is continually changing with changes with power and airspeed. Neither approach will be correct all of the time either in combination or alone. If you mixed enough rudder to keep your tracking straight on take off then it would be yawed to the right once in the air with increased airspeed.
Howard
Do you mean whatever setup (with or without right thrust) will not be correct?
I think I'm going to set the right thrust half of the needed and play with the rudder mix, what do you think about that?
Yes we can do wonderful things with our radios, but we got to be awake when progamming.
Arvid