[robair]

Gday Steve

The trick here is not to overcomplicate the matter. Your aileron throws should be exactly the same length, dihedral is not an issue, that merely makes the aircraft more stable around the lateral axis, the location of the ailerons is also not a major factor nor the airfoil shape. The size (surface area) of the ailerons is the trigger, the bigger the ailerons the larger your adverse yaw will be. The amount of deflection of the surface will also need to be considered, once again the larger the deflection the greater the yaw.
When I was learning to fly I was initially not very positive with the rudder much to the dismay of my instructor and the balance ball. To cure this I went out to Camden and flew gliders, due to the fact that they have huge non differential ailerons the adverse yaw is massive and coordinated rudder use is critical. The Blanik that I flew would deflect 10 to 15 odd degress in adverse yaw if you ignored the rudder. I would get bopped on the back of my head by my instructor with an ERSA every time I got it wrong. Once I had mastered this on the gliders I never looked back.

Cheers
Rob B