Fiberglassing the canoe ends

June 15, 2011 § Leave a comment

Someone recently asked how the ends are fiberglassed, so I thought I’d dedicate a post to that.

When I glass the hull, I cut back the cloth so that it follows the curve of the bow and stern but doesn’t quite go around. When the fiberglass has dried, I sand down the jagged ends so that the fiberglass is smooth where it meets the external stem.

To cover the bow and stern, I use the excess cloth that I trimmed off when I initially covered the canoe. I apply some epoxy to the area that I want to cover and position the cloth. The epoxy helps keep the cloth from sliding off the boat while I fiddle around with placement.

When the cloth is in place, I apply epoxy with a brush. I normally cut a slit in the cloth as I follow the curve to keep the cloth from bunching.

fiberglassing canoe ends

From this point, it’s just a case of wetting out the cloth and ensuring that it lies flat against the surface.

I then add a second, narrower strip over the first for added protection.

fiberglassing canoe ends

The end result looks a little Frankenstein-ish, but sanding the layers when they are dry renders the seams invisible.

The football filled

February 19, 2011 § Leave a comment

canoe widow [kuh-noo wid-oh]  -NOUN    The partner of a canoe builder whose recollection of his/her spouse is prompted by a whiff of sawdust that emanates from the garage.

___

After what seems like an eternity of stripping, the football is now filled. The children will now have to do without the tedious and vaguely distressing jokes (and associated mental pictures) of their father-as-stripper.

I got ahead of myself a little and started planing and sanding parts of the hull. The left side of the picture above shows how smooth the hull will eventually look against the roughness of the right side of the hull. There are minor gaps to be filled, but overall the strips are tight and level.

But there are a few details to complete before I turn my attention completely to planing and sanding. I’m using some of the off-cuts from the main portion of the hull to fill in the bow and stern of the canoe. These shorter pieces will be shaped after glassing the outside of the hull for form the upsweep of the bow and stern.

Once I have these pieces in place, I’ll be able to form the outer stems, but that’s a topic for another day.

Today, I’m taking out a canoe widow.

ca·noe

canoe pronunciation [kuhnoo]

Building the internal stem

January 21, 2011 § Leave a comment

Internal stems are what the strips are attached to at the bow and stern. They can be made out of a solid piece of wood, but it’s easier to laminate several strips. These strips are bent around the bow and stern forms. When you’re stripping the canoe, the stem gives you a good surface to glue the strips to at the ends. Internal stems are also important in terms of strength and helps the canoe better handle impact.

Because the internal stem is hidden within the boat, its appearance is less important than that of  the external stem. As a result, I’ve decided to experiment.

I had some strips of white cedar left from the previous build. The stock is perfect for the internal stem in that its soft and bends easily. I’ve also used pine in the past. I don’t have a steam box and don’t really feel like building one. That said, I know that cedar typically responds well to the heat gun. It’s still a little nerve-wracking to wrap the cedar around the bend of the form, expecting at any moment to hear the tell-tale crack of wood that has been overstressed.

For the first internal stem, I stack 3 knot-free strips of 1/4 inch white cedar. Instead of doing one strip at a time, I apply glue between all of the strips at once and apply heat. I gradually tighten the strips against the form, heating all the while.  Just as I tighten the final clamp, I hear the wood splintering. When I investigate, there are a series of small splits in the wood on the edge where material. Because the edges will be planed off anyway, I decide to leave it.

For the second stem, I soak 3 cedar strips in water overnight. The theory is that since it’s the dead of winter, the first strips have dried out somewhat. Soaking them will hopefully allow them to absorb moisture and make them easier to bend, particularly with the addition of heat. I apply glue (Gorilla Glue, in this case) to the strips and stack them. I clamp the stack to the end form as follows…

canoe building: bending the internal stem

…and add more clamps and pressure as I work around the curve. No splintering. In fact, the wood is bending smoothly and easily.

The final result looks pretty good.

canoe building: bending the internal stem

Note that I’ve taped the form. This is to prevent the stem from sticking to the form. Before I begin stripping (the canoe), I’ll tape the edges of the station forms as well.

I’ll let the stems dry before planing the edges and mounting the end forms to the strongback.

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