I am looking at CAD plans for an S-1, actual "plans" (actually instructions, with pictures) from the Sterling S-1 kit, a completed, flying S-1, and my own S-1A, partially scratch but partially kit, still uncovered...two papers, two planes.
jake: there is a hint of reflexivity shown on the CAD S-1 plans, but it is nothing extreme like an early Kenhi pollywag. If you look at my built S-1 model itself, you wouldn't notice it, if indeed it is there.
My S-1A framed up wing kind of has it, and kind of does not. In other words, some ribs are essentially straight in the aft portion, and others just may have a whiff of reflexivity. This is a kit S1-A wing.
I would say, then, that the airfoil shapes, as far as ribs go, are mighty close, S-1 vs S-1A.
Again, as others have pointed out, the S-1 would have sag between the ribs in the early stages, and the S-1A, since it is sheeted, would not. And I don't know what the overall effect would be.
If anyone else can go grab their R. models, kits, plans, etc, please go get them.