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 [...]

BeamBrackets and Cold Snap

15 March 2017 | St. Marys, GA
Capn Andy/mild winter
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 underside of the side deck, the top of the side deck is completely glassed.
The outboard side deck which ended fore and aft with a blunt square that was roughly finished with glass because I knew I would cut it back in some kind of curved shape. There was also a curved strip from the end of the coaming of the inboard side deck that would wrap around across to the outboard gunwale and continue as a facing on the end of the outboard side deck. This curved strip was made out of the crappy 1/8“ doorskin plywood. It was shaped and laminated from two layers. It ended up looking good, it doesn’t have to bear any weight unless someone sits on it.
The rudder gudgeons consist of the butt ends of the crossbeams which extend past the lee gunwale just enough to put a rudder there. The lower gudgeons are poplar 1X4 shaped identically to the butt ends of the crossbeams and situated below them just above the waterline. This hull design has little buoyancy in the ends, so when you are in the vicinity of the aft crossbeam, the water comes higher than the waterline and the lower gudgeon would drag in the water if it was not well above the waterline. The lower gudgeons pass right through the lee hull and are anchored inside the windward hull. The idea is to have them strongly mounted with a socket for the rudder pin, then put the rudder pin in place and attach the crossbeam above, with its own socket for the top of the rudder pin. The rudder pin is part of a cassette that holds the rudder but releases it when it strikes something hard, like a sand bar or a rock.
The crossbeam details get complicated because I want square edges where the crossbeam is in contact with part of the canoe, like at the gunwales, but want rounded edges everywhere else. It looks like we will have to add spacers to meet the bottom side of the crossbeams because the curve of the crossbeam doesn’t exactly match the points of the canoe that it contacts. It is my fault that I goofed when I calculated the amount of arch in the crossbeams, still can’t figure out how I came up with 11 inches as the distance between the main hull’s gunwales and the gunwales of the ama when the ama’s keel is just touching the water. Perhaps I doubled it from 5 1/2 inches, which is probably more correct, because I laminated the crossbeams face to face with a spacer holding them apart, the ama ends of the crossbeams clamped together, and the butt ends pulled toward each other to create the arch. So, if I forgot that I doubled 5 1/2 inches to 11 and then doubled 11 into 22 inches, that would account for the excessive arch of the crossbeams. Of course I will show them to people and say they are arched that way to clear the waves better.
I was going to make the crossbeam clamps, the brackets that hold the crossbeam to the boat, out of fiberglass and cast them in a mold. Then I decided to use hardwood and make them out of that. If the crossbeams had followed my original plan of laying directly on the gunwales of the main hull and ama, then the fiberglass route would have worked out, but with the increased arch in the beams, standoffs have to be made to follow the curve. Each attachment point has a slightly different profile and needs an individually constructed bracket.
A cold snap hit us and gave two days of very wet weather, then continued with the coldest days of the winter, which we had thought was over. Work with epoxy seemed to be out of the question due to the cold temperatures.
The crew from Bodkin Inlet came down to Florida to enjoy a spring break of mild weather. Sorry. Kaptain Kris and Cornelia Marie came down and Captain Neil and his co-captain Tess came up from Florida. We took a quick tour of the boatyard in between rain showers and headed to the local pub for burgers, etc. The photo is from that get together.
Gallery Error: Unknown Album [1:]:6137
Kaimu's Photos -

About & Links

SailBlogs Groups