ORIGINAL: LesUyeda
There was an on line CG calculator somewhere, that you entered the pertinent details, and it would answer the question. I cannot remember where, or I would past a link.
Les
Pitch control sensitivity and the CG location are controlled by 4 things mostly, the size and moment arm of the horizontal tail and the chord and area of the wing. A good online calculator that does all the work for you to figure out those important values is
http://www.geistware.com/rcmodeling/cg_super_calc.htm
All you do is measure your airplane and plug the numbers in.
It's an excellent step to take even for ARFs that tell you where they think the CG should go.