Milton,

Thanks for your aswer. However I realise now that I was not very clear in explaining what I really did want to know.
For many aerobatic applications the NACA 00XX serie is used, for example the Giles ARF (From Flair) that I'm flying now. In some articles the work of mr. Selig is mentioned and the S 8035 is mentioned as a improved aerobatic airfoil.
I'm in the process of designing a slightly enlarged Giles based upon the current ARF that I wil use as a kind of template. Now for the selection of the airfoil I could use the same NACA 00XX airfoil or the Selig.
I'd like to know what I can expect of the aerodynamics (flight performance) from this airfoil in relation to the NACA 00XX

In general I've allways these kind of questions; what kind of performance can I expect for a certain airfoil. I can find hundres of airfoils (coordinates) on the net, but in what area's they excel is very difficult to find.

Hans