Vittorio, I am very pleased to hear from you again. I will drop in and check out those threads. That simple thing of up, down or right thrust is a very simple concept, but determining what is needed for a particular plane is more involved. It all depends on the airframe, prop size and torque and is usually found through trial and error. There is no magic formula that one can apply to any plane. Recommended thrust settings are mearly a starting point and will differ depending on a particular setup. Small engines need less and larger more powerfull engines need more as they can turn a larger prop. What are your thoughts on this? Joe