Whats missing here is some hard data, not just the math. Randy, where are you? I know you have weight data for sheeted wings of all your stuff, 'cause you told me how much overweight the wing panels were on my Dreadnought when I asked you how much they should weigh. You could tell us how much more a larger SV type wing weighs vs a smaller one.
HI Steve
My SV wings of the large size SV weigh about 4 to 4.5 ounces per panel, keep in mind this is sheeted with LE and TE caps installed and done with epoxy and has a full strenght coat of dope, In my airplanes this makes a total weight of the wing ready in install in the airplane of 675 to 694 sq in of 12.5 to 14 ounces.
This weight ready to install includes the tips, LE guide, Bellcrank, tip weight box, flaps, hinges, horns, and is glassed on the center with the entire wing covered with paper and doped.
If my wings were thicker the weight would be just a very small amount more.
My airfoils are thin for my use...they are thicker than a Nobler, but much thinner than a PM or an Impact.
This is what works best in all of my years of testing. The leading edge radius is very important to me because of the way it affects tracking and the way the wing reacts in the whigher winds
The radius in my SV foils are about the shape of a dime or nickle..depending on which stations you use for the wing.
If you go thinner it will stall in hard corner, as will most all airfoils, if you go very blunt, the plan doesn't track very well, especially in winds.
I don't use very thick airfoils because in my opinion, it buys you nothing, and it hurts performace, too thick of a wing is not bad because of weight, it is not acceptable for me, because of the added power it takes to manouver a really thick wing with all of the extra drag.
This is exactly why for so many years Billy W stayed away from really thick airfoils..drag.. He didn't have the power to overcome it in his ships to the extent he wanted.
So bottom line I would not worry about the tiny amount of extra weight in a really thick wing but the added drag would be my major concern.
I will also say the addition of the new motors with so much power availible has made much of this not nearly as big of an issue as it was.
Regards
Randy