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.
12 January 2018 | st marys, ga
02 January 2018 | st marys, ga
01 January 2018 | st marys, ga
30 December 2017 | st marys, ga
26 December 2017 | st marys, ga
26 December 2017 | st marys, ga
23 December 2017 | st marys, ga
21 December 2017 | st marys, ga
20 December 2017 | st marys, ga
19 December 2017 | st marys, ga
13 December 2017 | st marys, ga
12 December 2017 | st marys, ga
03 December 2017 | st marys, ga
02 December 2017 | st marys, ga, earth
02 December 2017 | st marys, ga
01 December 2017 | st marys, ga
25 November 2017 | st marys, ga
20 November 2017 | Gulfport, Mississippi
18 November 2017 | Panama City Beach, FL
18 November 2017 | Panama City Beach, FL
Recent Blog Posts
12 January 2018 | st marys, ga

Bon Voyage Crawdad

The cold snap, which is the coldest weather I have experienced down here in St Marys seemed to persist longer than forecast, about a week. It has been freezing overnight and most of the mornings, temperature going down to 28 on successive nights. This is nothing compared to what people up North are [...]

02 January 2018 | st marys, ga

The Penguins Have Us

The coooold snap that is freezing us to death is only affecting the Keys a bit, maybe ten degrees less, so 50‘s and 60‘s instead of 60‘s and 70‘s, or 70‘s and 80‘s. The Keys and Bahamas are where to be in the dead of winter.

01 January 2018 | st marys, ga

Happy New Year Chart Wrap Up

It is Sunday, New Year's Eve Day, and I have come down with a cold. My chart work is finished. I can't imagine going outside to work on the hull bottoms now. I may run out of paper towels to sop up my runny nose.

30 December 2017 | st marys, ga


When THE COMPUTER GUY was talking to me about running shell scripts to convert old charts I had mentioned I liked to manually crop each chart and save it from the image manipulation program. Every chart. He looked at me funny. The shell scripts are ways to do a lot of that manual data processing and [...]

26 December 2017 | st marys, ga

Sir, Render

The procedure to convert old electronic charts in the tiled .pcx format to charts that newer nav programs can use involves bulk processing with shell scripts. The shell scripts I needed to use are located in a compressed archive called pcx2tif.

26 December 2017 | st marys, ga

A Walk in the Park

I had a couple of negative shopping experiences for the holiday season, both involved long waits for ordinary products. I wasn’t looking for quick shipping this time of year, but please, Amazon waited a week to finally ship a box of grinding discs and a roll of Gorilla tape. And that is just to ship [...]

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.
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.
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.
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.
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.
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.
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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