Thanks for the link Looker that looks like it might be a nice little program, but I used the coordinates it supplied and it didn't look too much like a laminar flow section. I'm fairly familiar with that family of airfoils and What Rhino drew using those coordinates looked more like a airfoil from the 4 digit family than the 5 digit.
The airfoil the piper cherokee uses comes from that family although I think is has more camber than the Darshark, I might just use that one in the knowledge that no one will be able to tell.
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