Actually, at the scale you're talking about the 'foils shown might work just fine.  It's that love affair with air and Mr. Reynolds.  At the larger scales, the Reynolds numbers start to fall into a workable range.

Ditto what Pete said! Very interesting plan and model!
Tom

I'm just finishing up on my Parasol 25 incher, I got my next build sitting in the box on my work bench and I'm already planning out my 3rd.

I'm not new to building flying models, but I haven't touched FF since the 80s.. until my American Eaglet.
My question is if I should change the airfoil on the Gloster I plan to build soon. I really like the slow flying, ballet look of FF and I was looking at the thinner, more symmetrical shape of the Glosters wing. There is a lot of lift generated on the model from the fuse and 2 huge floats, but that sharp entry of the leading edge concerns me.. a little. I not that experienced in the FF designs, so I don't know how much it will effect something this light. Heck, I've had paper planes that flew unbelievable. I just wanted some opinions and what you guys think. Please don't be offended if I go in a different direction than what I'm suggested. After all, isn't that why we build our planes? To be out of the box, change from the design and see the results from our many mistakes, and once in great while, our improvements? Either way, I would love to hear from folks more experienced than I.

David

http://www.outerzone.co.uk/plan_details.asp?ID=4662