This is my first posting,

I used to have a PT-40 that i flew for two years and then destroyed its wings (it was my first plane). Moved on to another trainer temporarily after not flying for 2 years (it is the Easy Fly 40). It is getting my confidence back to fly my scratch built Cloud Dancer 40. Soon ... really soon i will fly it.

As for the PT-40 i did by a wing kit for it, but i would like to do some modifications to it. I want to add some flaps and increase the aileron effect. Also i was told by a friend not to completely remove the Dihedral Angle (I did start with B Dihedral .. the lower of the two options).
My idea is to add flaps that are 1/8 of wing span on each side and are 1/8 of chord wide. As for the ailerons, I thought of making them 1/4 of wing span on the ends and 1/4 of chord for width.
Th problem is that the aileron will stick out of the wing profile, and i don't wont to change the ribs of the wing to accommodate for the 1/4 of chord width of ailerons.

Does any one have an input on that?

Thanks

Why would you want to add flaps to a PT-40. I have two of those planes and they do not need flaps at all.

Just for the fun of it and to train my self on flaps. No real reason .... but thought it might make the landing more fun

I did fly it for a year and a half and I know it works great.

I agree with Manks. I have a PT-40 and it does not need flaps. What you can do is to use two aileron servos and use flaperons and increase their surface.

I have always considering build another wing with reduced dihedral to one inch. This is one side of the wing flat (0-degrees) and measuring the height of the other wing tip to the flat surface. I think the "B" dihedral is close or more than 2-inches. Also, you might want to modify the wing ribs and convert them to semi-symetrical instead of flat bottom. And finally, with the semi-symetric wings, reduce the incidence of the wing to cero degrees or +1.