How would it sail now that the center of effort has been moved aft?Had an idea...
As promised—The general shape of the Grumman leeboard for their sailing canoe. Although this leeboard (1 of 2) is almost twice as wide as the original, the shape follows the leading and trailing edges. Put another way: you could remove the center 2-½ inches, vertically, and have the size and shape of the original.How would it sail now that the center of effort has been moved aft? For your canoe, you could get away with a single leeboard, but the crossmember should be made of metal. The crossmember should be shaped like an "L", with the bottom about the size of a postcard, and, if aluminum, ⅜" thick. Its two-clamp placement would be about one foot aft of the mast. I'll send a picture of the shape I'd copied from Grumman, but re-made and enlarged in ½" marine plywood. Those original parts were sold to a chap in Maine, who wanted sail-power for his Folbot kayak—Of which, I have two.
It's 31-inches from bottom to the point of attachment. (The original had a 4-inch handle which made it unnecessarily longer so I left it off).Great! WHat's the length, I was thinking a Shadow or Barrington board may work, although we are going to try adding a mizzen first...to the canoe.