I am rebuilding my big trainer to use a SAito 130 twin which I recently acquired. I have only the rear part of the plane which is just as well. It is actually a Skyward 120 arf , essentially their 60 blown up 150%. The original was 20 lbs with a OS 120 . It definitely flew on the wing, but it was an awesome plane to fly.
The original foil has a little less than 2% camber and is semi-sym.
It is about 13% thick. I feel that this foil gives up too much lift, I flew the 60 size and felt the same thing.
I ahve a big Edge so this will be my floater, might even get floats for it.
So does anyone have experience with some "flat bottom foils" like the NACA 4415 or true Clark Y. I built a small Cub with the S7055 but its only 10.5 % thick.I am upgrading my Compufoil to 2000 so I can hardly wait. This is going to be a fun project after doing the Edge all winter.
I might add my target weight will be 13-14 lbs, & I'm usually close.