Monday, September 30, 2013

Clamps and lumber

I spent a lot of time, way too much time, looking into lumber for the gunwales. Every canoe building website I looked at suggested ash. Nowhere in Boulder sells ash, and after dismissing all the alternatives for one reason or another, I decided to buy lumber online. Choosing gunwales is tricky because you need wood that is strong yet pliable. The thinner you make the gunwales, the lighter the boat will be, but it won't be as robust. I need thick gunwales on the inside so that I can attach seats and portage yoke. I ended up buying 4 - 1"x4" boards of ash, each 8 feet long. It would have been nice to use one long piece of wood for the gunwale, but it's just not feasible. The dimensions I am going with are symmetrical inwales and outwales, each 13/16" in width and 1 1/4" in depth. These gunwales will be attached with epoxy and clamped on. I had to make a lot of C clamps for this purpose, so I cut a 3" PCV pipe into a bunch of pieces and cut a notch out of them.  I now have 20 C clamps to hold the gunnel onto my boat. While this is a cheap and easy way to make clamps, it was also terribly messy. The plastic sawdust sticks to everything and will be around for a very long time. 

Finishing the inside seams


I spent a lot of time working on the inside seams. Mostly because I was busy with other things, but also because I didn't want the epoxy to run too much. So, I would tilt the canoe to the side I was working on so that any epoxy would run into the seam. At left, you can see a close up of the seam filler, which is epoxy and wood flour. I referred to it as 'baby poop', but it's consistency was more like chunky peanut butter.


Despite my hard efforts to be gentle with the canoe, my roommate decided trip over something and test the hulls structural capabilities. The hull failed the test. I patched the ~20" crack with a strip of fiberglass cloth and epoxy, but I'm not sure how well I did. Hopefully the fiberglass cloth laid on the outside will be enough. I am a bit worried about bubbles of air in the cloth leading to leaks.

I finished the inside seams. The color difference in the main seam is due to a change in wood flour. Not the most aesthetically pleasing, but now my canoe is not symmetrical, so it should be easier keeping track of which way is front. Although I haven't yet decided which is the front.



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