ORIGINAL: hilleyja
Please explain what I need to do to "static" balance my control surfaces.
The easiest way is to attach a wire to the end of the control surface that extends ahead of the hinge line outside of the wing or other surface. Place a weight on the end of this wire to almost make the control surface stay at any position when the servo is unattached. You do not have to be exact at this weight.
Calculations to determine the exact weight required are very complex. In full scale work the exact weight is usually determined in flight test. At least they were in my day. I guess with supercomputers you could calculate it now. Someone would still have to program the computer though