This is an airfoil one of my scratch built airplanes ended up having. When I tested the wing for lift, the 16.5 cm chord and 74 cm span wing gave 1.2-1.3 kg of lift at about 15-25 miles an hour. Now for a wing so short in span and so thin in chord- that is a pretty good lift factor. So my two wings combined give about 2.5-2.7 kg of lift at 20-25 miles an hour.

Here are two diagrams I drew trying to figure out the airstream behavior on this wing. Which one of them looks more close to how the airstream actually behaves around that kind of an airfoil?

If any of you know of any free or demo online/downloadable programs for DRWAING your OWN airfoils and testing them in a virtual WIND TUNNEL, please post a link to that software or at least give the name of the program. Thank you very much.

Yishht87, cheers.