If theory on full scale can relate -- --on the truncated airfoils -- the idea is to create a low pressure on the T edge - which sucks the air down to the wing surface .
How's that for basic?
On the models -- can't proove it one way or another.
At least I can't someone stole all my Reynolds Numbers --
What becomes clear tho --is that the structural change (thicker ) makes it more rigid.
We abandoned the super sharp TE years ago -
Way back -beforetime began - a fellow by the name of KAMM - came up with the novel idea that IF- you could not properly streamline a car body - then you were best off to simply whack it off as short as possible-once you got the front /sides and bottom right .
This also decreased wetted area ---