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.
24 March 2017 | St. Marys, GA
23 March 2017 | St. Marys, GA
20 March 2017 | St. Marys, GA
15 March 2017 | St. Marys, GA
05 March 2017 | St. Marys, GA
28 February 2017 | St. Marys, GA
24 February 2017 | St. Marys, GA
24 February 2017 | St. Marys, GA
24 February 2017 | St. Marys, GA
18 February 2017 | St. Marys, GA
11 February 2017 | St. Marys, GA
11 February 2017 | St. Marys, GA
09 February 2017 | St. Marys, GA
06 February 2017 | St. Marys, GA
31 January 2017 | St. Marys, GA
22 January 2017 | St. Marys, GA
12 January 2017 | St. Marys, GA
04 January 2017 | St Marys, GA
29 December 2016 | St. Marys, GA
26 December 2016 | St. Marys, GA
Recent Blog Posts
24 March 2017 | St. Marys, GA

French Toggles

The goal is to refinish the foredecks and the rest of the cabin sides by the end of the month. Some work on the outrigger canoe is being done at the same time.

23 March 2017 | St. Marys, GA

24 In. Multipurpose Trim Guard

I can tell when I have undesirable work ahead of me, I start doing everything else that I can think of. The hatch installation job was set aside so I could do something else, which turned out to be the proa, outrigger canoe, project. Now I had to get back to the hatches, but I still found other things [...]

20 March 2017 | St. Marys, GA

Birdseye View

It was time to return to working on the big catamaran and the installation of the new large Bomar hatches. I had cut out the hatch coamings to accept the new hatches and added new wood to the perimeter of the coamings to compensate for the wood removed. In order to get a perfect fit, I taped off the [...]

15 March 2017 | St. Marys, GA

BeamBrackets and Cold Snap

The remaining fiberglass work on the outrigger canoe included the underside of the inboard side deck and the bottom of the main hull. The inboard side deck already received a 3 foot wide fiberglass belt amidships and now only needed two 3 1/2 foot sections fore and aft to be completed. These are the [...]

05 March 2017 | St. Marys, GA

BFB Test Fit

The epoxy order was on its way so I used up the last little bit I had, priming the main hull’s decks and the bow compartments. The ama deck was primed and then I was out of epoxy.

28 February 2017 | St. Marys, GA

Side Deck Trouble

I had to order more epoxy, I was using it like a fiend. Laminating the hiking seat took 900 ml, about a quart, and that was only for the core. The two layers of fiberglass that wrap it will take as much or even more.

Ama Sutra

11 February 2017 | St. Marys, GA
Capn Andy/mild winter
Webb Chiles is off at sea again, rounding the Cape of Good Hope in Africa and heading up North. Here is his yellowbrick tracking site: https://my.yb.tl/gannet. I noticed that he has fired right out of the gate with a couple postings of 8 knots plus, in a 24 foot boat.
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I made a jig out of a short piece of cedar stringer stock, about 4 inches long. I cut a rabbet and drilled a couple of holes in it to use as a drilling guide. The rabbet holds the jig against the edge of plywood, and the holes, 3 inches apart and 5/16“ from the edge, are used to drill the holes for stitch and glue construction. One hole has a sheet rock screw partially threaded, so after you drill the first hole in the plywood, the tip of the screw is centered in the hole and the remaining hole in the jig lines up your drill for the next hole in the plywood.
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After drilling the holes (50), I used some donated solid copper wire, about 18 gauge, to twist and tie the panels together. Only the keel edges were tied, the bows will be done later. I used 5mm ply to cut out three bulkheads, one for amidships and two 3 feet forward and aft of amidships. The bulkheads were temporarily pushed down into position, forcing the hull into shape. I had to get a look at it.
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Next I cut out butt blocks, more like butt plates, 4 inches wide and extending from gunwale to keel. Two plates to each bulkhead. They serve to spread out the pressure of the bulkhead against the hull side so that the hull side doesn’t have its ribs showing. At the amidships bulkhead I added 3mm thick hardwood splines that ran fore and aft across the edge of the bulkhead to keep the hull sides fair. They were about 8 inches long and bisected the butt plate into two smaller plates on each side of the bulkhead.
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The whole shooting match was dry fitted with a hole drilled just under the gunwale on each side of each bulkhead, dynema string threaded through the holes and over the top of the bulkhead in a figure 8 loop, and the loop tightened with a spanish windlass, forcing the bulkhead downwards, and pulling the gunwales up tight against the bulkhead edge. The positions of the butt plates, splines, and bulkheads were marked and labeled so that they could be reassembled for the final gluing.
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I had expected the seam at the amidships bulkhead to need trimming, but it wasn’t necessary. A mix of epoxy was brushed onto the gluing surfaces, then mixed with “glue strong” filler and applied to one side of each glue joint. My mix for “glue strong” is 4 parts of colloidal silica to one part of milled glass fibers. The pieces were assembled again and the spanish windlasses were wound up. The pieces were finally tapped into position with a small hammer. The joint between the bulkheads and the butt plates was filled with the epoxy mixture. Later they will get filleted when the keel and bows are filleted.
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The photo is of the midships bulkhead. It has the spanish windlass of blue dynema line over its top and the white piece of wood used as a handle to wind it up is there with a clamp to keep it from unwinding. The butt plates and spline can be seen jammed against the hull side by the edge of the bulkhead. The pencil line across the bulkhead is the normal gunwale height and it intersects with the gunwale on the right. The gunwale on the left is higher, raised so that the deck will have an angle to match the crossbeams, which curve downwards to the ama. This picture was taken while dry fitting the bulkheads. Later they were glued in permanently.
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