www.profili2.com is an airfoil program
I don't know if some of you scratch builders and others know about Profili, and if it has been mentioned here on RCU before, (I can't imagine that it hasn't been mentioned before) I think it is well worth checking out. It has a lot of capabilities. It is invaluable for scratch building and designing of models. The developer is a modeler in Italy, Stefano Duranti, he is super nice to deal with, and he really doesn't charge that much for the program. You can check out the features without actually buying it. I would be interested to hear what some of you think about it.
John