Does anyone happen to have a reference or such that explains the naming convention used by Prof. Wortmann for his airfoils?
Usually it follows that for symmetrical ones, the first 2 digits are to indicate the planned transition location at zero alfa and the last 3 for for the thickness.
ex: fx76-120 -> fx (prefix for FX.Wortmann) 76 (transition) 120 (12%)
would like to double confirm this with a reference if available and also the meaning of the middle letters used in some foils.
Ex: FX76-MP-150 (MP for man-powered in this case but there are many more) 2 is known thanks to Peter Kampf. Any idea on remaining?