The user simply selects the tab for the class of N.A.C.A. airfoil that is desired. Now simply selecting option buttons constructs the airfoil on the fly, with the shape automatically previewed below.

 

 

 

When you have the shape you want, the OK button is selected. This brings the NACA airfoil into CompuFoil3D. From here you may continue to refine your template for use, or if you are only interested in producing the coordinate file, the menu item File/Save As... is selected. Your NACA airfoil can now be used in the lofting module to auto-generate complete sets of ribs.