Hi Folks,

I need a 15% to 20% thick laminar flow airfoil with a four foot chord for an inflated wing that has a rounded trailing edge 1.25 inches in radius. I would hope to be able to get at least a 10 to 1 lift to drag ratio. I would like to know how thick it can go and still maintain this lift to drag ratio. Can anyone help me. If not, do you know anyone who can? I hesitate to buy software for a one time use. But what is out there that is particularly good?

--Thanks,
Wayne