Kaimusailing

s/v Kaimu Wharram Catamaran

Vessel Name: Kaimu
Vessel Make/Model: Wharram Custom
Hailing Port: Norwalk, CT
Crew: Andy and the Kaimu Crew
About: Sailors in the Baltimore, Annapolis, DC area.
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Tortured Ply Main Hull Pt. XV

24 October 2014 | Bodkin Inlet/Chesapeake Bay
Capn Andy/Indian Summer
The bulkheads that were cut out had a shape that was not just a random curve that looked good, the curve is calculated to allow the top tip of the bulkhead to flex just a little bit. That way, the bond of the bulkhead to the upper portion of the hull won't separate as easily.
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The gunwales are kind of floppy. Stiffening them will stiffen the hull. Inwales will stiffen the gunwales. They are lightened by blocking them inboard away from the gunwales. This is called a ladder inwale. It would be nice to round the edges of the gunwales and inwales. The trimmer router would do a good job, but it can't get everywhere, and not all the edges have to be rounded. We will have to dry assemble, mark, and then round off.
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A yacht designer named Ralph Munro developed proas on Biscayne Bay around 1900 or so. He stiffened the gunwales by adding a narrow side deck with coaming on the lee hull side, and a shelf outboard of the gunwale on the windward side. On the windward side, the shelf would deflect spray coming off the hull or coming up from the outrigger. On the lee side, the narrow side deck would help add buoyancy if the proa was knocked down in a gust.
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I was told what I was calling a ladder inwale is just an inwale.
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We had a rain event, so work had to stop with the inwales and blocks cut, but not yet marked. The next day they were marked as to where the blocks would go.
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In the tortured ply hull a spot near the bows was kind of dished in, so spacers were glued in to keep the hull shape fair and concave.
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The flat polyproplene webbing for the jack line for Kaimu came in and was delivered to the boat at anchor. We will be docking in a couple of weeks to provision for the cruise to the Florida Keys.
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Another rain delay came through and everything was covered again.
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Deck beams for the ends of the tortured ply hull were cut and test fit. I'm hoping they will prevent the cambered deck from dishing, keep a fair curve. The big glue up took place with the 4 inwale stringers and 56 little wooden blocks. The process was tedious but simple. Air nail the inwale stringer to the block while holding it in position against the inside edge of the gunwale, then do the next block, etc. The deck beams were also glued in place. The wave piercer hull is now almost complete, just needing crossbeam saddles and more epoxy and paint. The tortured ply hull needs a cockpit floor and decks along with the beam saddles.
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The picture is of the tortured ply hull after the glue up.
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