Showing posts with label Stem. Show all posts
Showing posts with label Stem. Show all posts
Friday, 2 September 2011
Making Stem Pieces Final Stitching
Here are some shots of making & stitching the ends of the canoe. First, some stem pieces were prepared from cedar stock that had been soaking in the lake overnight. One end was split carefully multiple times to about 80% of the length and then the cedar was wrapped in some leftover leather lace. With plenty of boiling water on hand, they were bent to form the modest curved end of the style of canoe I was aiming for. Even though I've used Adney's plan of the Attikamek Hunter's canoe, I've decided on a canoe with less sheer and stems with less curve, similar to the ends of a St.Francis Abenaki canoe also listed in Adney's book.

Starting the splits

Working the ends

Bending with hot water
My first attempt resulted in a cracked stem piece, but luckily I had prepared an extra bit of stock in anticipation of some mistakes. The next two stems didn't crack and were held in place in a jig I made with scrap pine board and some nails.


Broken attempt; 2 stem pieces drying on form
Once the items were dry a few days later and after most of the gunwale lashing was complete, I clamped the pieces into place and began stitching them into place.



Temporarily clamped; Hull inverted; Stitching into place
Once these were in place, I spent some more tedious time stitching the lap joints, gores, and any other minor cracks that appeared in the boat. For 2 large knotholes in the hull, I ended up stitching extra pieces from the inside that I'll end up gumming up tightly when the time comes.

The completed bark hull

Inside look
Even though canoe looks hogged at the moment, this is apparently normal after it comes off the building bed. There's a lot of "flex" in the bark at the centre of the canoe, so it'll pop into proper shape when the ribs are in.
Friday, 18 February 2011
Creating Stem Pieces and Headboards


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.


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.



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.



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.

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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