The next step is to make the fore and aft bulkheads. The stringers are 1/4 inch plywood and the bulkheads are similar to I beams made with solid sitka spruce sides supporting an 1/8 inch plywood wall. The mast support is a sitka spruce I beam made from pieces left from cutting the hull profile. The steering post support is also 2 hull profile cutoff pieces supported by 1/8 inch plywood stringers on either side, top and bottom.
The block support is 1/2 inch Baltic Birch plywood shaped to fit the aft profile. 1/2 inch Baltic Birch runner plank supports and 1/2 inch high cockpit deck support strips are glued into the corners.
Additional 1/2 inch high strips are cut to support the cockpit deck and 1/2 inch thick foam pieces cut to fill the spaces between the supports. Note the position of the bob stay anchor and add a larger piece of 1/2 inch plywood.
Clamping the 1/8 plywood deck top over all of this would be difficult so we decided to use several hundred pounds of weights.
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