Sorry my iphone could not show the bottom of the page. $450 is too much for a compromising foil.
if it is Eppler 837, I would buy it.
The offshore one closest to 100mm , is 4", and it's 1.1" thick ; that
works out to a 27.5% thick airfoil. That is WAY too proportionally thick for
the cord length. The Eppler 837 is only 16.1% thick, and would be Easy to build strong.
The 27.5% thickness isn't what bothers me most for the profile
on the offshore one ; it;s that rounded Trailing edge that's a Deal-Breaker !!
If the TE was flat, with sharp corners, it would produce less drag than
a round one.
I wonder if a guy wouldn't be better off trying to find a wood-working shop, that
could make a wooden one from a suitable tree with the E 837 airfoil; then it
could be stiffened up for under $40. Some people don't like the messy composites, but
they make that pultruded carbon rod, that can be placed in a groove made by a
router, and glued in with ease ; take maybe a few hours to do the job, if you didn't
need to do your own shaping.
Here is a question :
Say you set up a router to cut the E837 foil with a jig, from 2" X 6" stock ---
Would you cut a pass or two on one side, then alternate cuts
to the opposite side to keep the shaft from warping ; or is that
not going to be a problem ?