ORIGINAL: Area51.5
under the large model guide lines it says the MAC sgoulf be 2-3% less than 25%. Is this a requirment or something they recommend to prevent flutter. Thanks
Are you referring to full flying control surfaces pivot points?
If so, it is more about giving a balanced surface control authority...which incidentally translates into less tendencies for flutter; servo torque is dependent on relative arm lengths (servo/control surface), airspeed and total surface area...