I am cutting foam wings for SSC class combat planes ( and oh, by the way you have to try this SSC class combat, it's faaaantastic) and I am currently trying different designs of tapered, constant thickness wings using flat bottom airfoils. I am trying to create a template for my root airfoil that would allow it to stall first before the tip. I would like to avoid using any washout at the tips just to keep the cutting a little simpler. Would a sharper leading edge at the root give me an "earlier" stall ( stall at a lower AoA) than the larger radius LE tip airfoil? Remember, this will be a tapered wing but of constant thickness.

So far, the wings I have cut do fly great and really maintain their energy in a tight turn, but I want to see if I can further improve these wings.

Any recommendations would be appreciated.