The object of the exercise is to provide a flyable airplane for the first few flights. From the simple diagram I posted to the complicated computer programs there is something missing. They provide positions for STATIC balance only. They fail to consider engine incidence and offset, if any. Wing and tail incidence, if any. The lifting component of wing and tail airfoils. Airspeed. So simple is best.

An airplane is not a static object. After the first few flights the REAL balancing and trimming of the model starts. And that is a whole different subject. I know where my Pylon Racers balance. It still takes a dozen flights or so to get a specific racer just right. And all I am doing is flying left hand circles.

Does anybody think that by sticking numbers in boxes one can balance and trim a full house Precision Aerobatic airplane?

Ed S