FoilSim II Version 1.4nhttp://www.grc.nasa.gov/WWW/K-12/airplane/foil4.html
FoilSim II Version 1.5ahttp://www.grc.nasa.gov/WWW/K-12/airplane/foil2.html
More free NASA software.
At the bottom of this window you will find an Index of the educational programs.
I wish I had something like these to use back in the 1940's when I was in school. They are still of great value to an old guy. Maybe you can teach an old dog new tricks.