With the stem in place and a full head of steam, we are excited to be thinking about moving into the planking. But first, we have to line off the boat…a job that everyone says is more feel than science.
Willy calls for five planks and although they are drawn onto the plan on the front page we realize upon inspection that the lines shown have no reference to reality. We think that the planks will look best if they appear to all be about the same size. For the middle planks that will be no problem. But the garboard and sheer strake planks present their own issues. Optically the garboard plank will include the thickness of the flooring, so this plank needs to be a little smaller than the others to appear the same size. Whereas the sheer strake plank will be partially covered by the outwale so this plank needs to be a little bigger than the middle ones.
So there you have the theory, in reality we ended up making all the middle planks the same width, the garboard about ½” smaller and the sheer strake about ¼” bigger. As it turned out our planks are not wide enough to accommodate a sheer any wider so we compromised.
We had real problems with getting good battens for the lining out. At first we ripped up a spruce 2 x 4 in to 3/8” strips and even though the board was straight to start out with it had some incredible internal forces that warped these thin strip something fierce. For stability we decided to use plywood. The 3/8” ply was ripped into ¾” wide strips (the width of our overlap) and scarfed together to make 16’ battens. We encountered some difficulties with battens where there was a gap in the 3 ply, plywood—this was solved quickly by brad nailing a section of reinforcing plywood over the bad piece. It was amazing how visual this task really is, there is lots of looking at the battens from different angles in order to determine what a “fair line” really is. Here is was we have decided to run with:
Router Scarfing Jig Tricks