I am working with a manufacturer to make some prototype rotor blades. I have quite a few ideas on the planform, but I need help with some good airfoil sections. I am looking for several airfoils to acommodate the different (intrinsic) angles of attack of the rotor blade. Can someone out there offer some assistance?

I am looking for some symetrical sections that don't really spike up the drag with high angles of attack. Does anyone have some suggestions?


If you e-mail me at home I can respond [email protected].


Thanks
Paul Soha