Airfoil advice for Freewing

[lostrider]

Im going to build my first freewing with a GWS B geared 300 size motor to test&see what i can get with that airframe.

Wing span will be ~120 cm, with the 400-550 gram of total flying weight.
Foam is the main component for the all body and wings, with some balsa & rods.

I need airfoil advices for a Freewing Scorpion like model,
Also i dont have any plan but just info from some pdf&photos, if anyone has much more information about the scorpion, i'll be happy to see.

Im a real fan of the planes which have real low stall speed characteristics like that. Some people loves the speed and acrobatics. I love the perfect landings-take off's and stability.

[lostrider]

Also what if i choose an under chambered wing profile with this type of plane?
Which is works and best for freewing? flat bottom, symmetric or under-chambered,
I feel like i need to go with symmetric airfoil but i have a medium under-chambered ready wing, and if its possible to use it with the freewing, i'll go with it.
But as i know, under chambered wing profiles doesnt have a stable airflow at bottom,
So it will create a bad effect on the freewing thing.
Is that correct?

And thanks to the designer of scorpion for a thing like that.
Freewing is a real nice thing, besides it looks like State of art as a plane.

[lostrider]

this subject now going in Modeling science.
http://www.rcgroups.com/forums/showthread.php?t=807760