If you want to see a MAJOR change in airfoil on a full size plane check out the wing on a Navion. Navions were designed and built by North American {same as the P-51 Mustang} The root is almost symmetrical and the tip is so under cambered it looks like it's from the Wright flier.
Try this: http://aeroweb.brooklyn.cuny.edu/dat...ge.htm?id=5806