It is perhaps worth mentioning that physical size plays a part on how a wing section behaves. In general the smaller the plane the less significant the wing section becomes as other factors like the viscosity of air play a bigger part. This explains why models are unable to achieve anything like the lift to drag ratio of a full size plane let alone at the same airspeed.
If follows that in models the wing section performance is less significant than its general characteristics. After all a perfectly controllable model plane can be built with a flat plate wing.

Certainly up to 2m span some of my best flying home design planes use a Clark Y type wing section and for scale planes I have no problem using a true scale wing sections right up to the complex twists in Concord's wing..

As it flies perfectly well at just 1/10 of the take off speed of the full size it raises the question does the wing section in this case make any difference?
A still from a flight video

Just saying.
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