Does anyone know if when you change the weight, wingspan, ect. Do all the other specs change with it or do you need an aerodynamics degree to do this? They have so many variables that it is amazing. The extra is 40% or so now and I am wanting to practice with 30% (50cc) for IMAC. I am attempting to get the sim trimmed as close to my plane as I can

Hi
You will need to change all specs Re : inner out wing chord , control surfaces.
Just take all the measurements off your plane and add it in to Phoenix "extra" edit part .
Phoenix will not scale it all down for you

I will be doing same thing when I get my new Pilot RC 88" Extra ...(30%).

I have done a new scheme for it .
look here
[link]http://www.rcgroups.com/forums/showthread.php?t=1045667&page=26[/link]





Greg