Rear Seat, Stiffeners and Gunwales

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The FB11 has two positions for the rear seat depending on how it's loaded and configured. I installed the sets of cleats for the two positions and tried the fit of the rear seat, previously cut according the the dimensions in the plans. There was a rather unfortunate difference--the seat was short about an inch in width

Rear Seat Problem
The Inch Gap

Fortunately the seat is made by laminating two 1/4" pieces together. I have learned a bit at this point about what you can do with plywood and epoxy and it didn't take long to come up with a splicing solution...

Rear Seat Fix
The Splices

I cut the seats and put in two 2" wide strips at opposite ends and glued the whole thing together. I only fiberglassed the joint on the bottom side because that's the only place where a tension load will come on the joint when somebody sits on the seat. The seat also gets stiffeners on the bottom at the front and back edges. Then I cut the seat to the actual dimensions.  The front seat was also a poor fit. I cut another one to dimensions as constructed.

The middle bulkheads and rear transom get stiffeners. Cutting and installing them was straightforward.

Stiffeners Installed
Stiffeners Installed

The gunwales or rubrails of an FB11 are in two pieces. First a 1" x 1/2" strip is glued flush with the top of the side panel on each side. Then a 1/4" x 3/4" strip is glued on top. It took about all the clamps I owned plus what I could beg, borrow or steal to hold them in place.

No Spare Clamps
Not a Clamp to Spare

Up near the bow it was not possible to glue the rail on flush with the top edge to the side panel. At one point it was about 1.5" shy of a flush fit.

Gunwale Mismatch
Rail Mismatch

This was easy enough to fix with a little sawing and work with a rasp plane. I am wondering if the differences I have encountered are due to the plans being based on a fir plywood construction, and I have used Okoume here. There are lots of places to go wrong, transferring dimensions, cutting etc. But in the end what strikes me is how forgiving this construction method is.

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