brian whatcott schreef:

I tried an early version of Drela's Xfoil. It is available now in
several suitable flavors he
http://web.mit.edu/drela/Public/web/xfoil/

Thank you, XFOIL had already been mentioned by Oliver too. I will first
explore the Java program mentuioned by Leon@caspercity, it seems to come
close to my natural habitat.