Friday, 18 February 2011
Creating Stem Pieces and Headboards
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The process started by using my poster-sized, quarter scale bluprint from Adney's book and crudely tracing the image of the stem piece on paper. This was then transfered to a corner of the building bed with transer paper and ¼" holes were drilled around the shape to fit some spare dowels provided by the kit. This would be the "form" around which the stem pieces were bent into shape.
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Marking the dowel holes; Completed bending form
The stem pieces were scavenged from strips of broken gunwale stock that snaped during the early carving process. I was able to use a piece of appropriate dimension & horizontal grain to make 4 stem pieces in case any broke during bending. Each would be split nearly 2/3rd of its length into 4 laminations to accomodate the curve. Once these were done they were soaked in boling water to soften the wood and begin the bending.
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Scavenged gunwale piece; Near horizontal grain; Split stem pieces in boiling water
Carefully, a selected piece was bent around the frame and the bottom tied off. In a full sized model, the traditional material for this is basswood bark. Since this wasn't provided by the kit and I didn't want to use any split spruce root (in case I ran out for lashing), I ended up using non-traditional waxed linen thread from left over leather-craft projects. It worked perfectly and helds its knots easily without slippage.
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Wrapping the stems and bending on the form
With the two stem pieces drying out I turned my attention to making other structure - the headboards (aka manboards, shoulderboards, struts). Various styles exist, some straight, some curved. I wanted to keep mine simple so carved a basic vertical structure similar to most old style Algonquin canoes. The bottom has a rectangular "legs" that fits over the stem piece tightly while the top has "shoulders" and a round "head" to squeeze under the inwales. The whole structure gives the ends a rigid structure while also helping to lift the gunwales at the ends. I decided to try a practice one first in case I had more cedar distasters. With that ok, two more quality blanks (1/8" thick) were prepared and carved out.
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Practice headboard and two cedar blanks
I won't be able to insert the stems pieces or headboards for a while (at least until the bulk of the canoe a sewn up with spruce root), so in the meantime I'll be carving other parts like the permanent thwarts and sheathing.
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