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måndag 4 maj 2015

Ten paddles project part three (last)

So, time for the last update on the project.The paddles are hanging from the roof and waiting for the oil to dry. And I'm even too tired to enjoy being done with them. But I think it's nice to get some distance now, then I'll enjoy them much more later.

Since my last post I've formed the grips, smoothed the surface and oiled them. And I've learned a lot from this. Especially how to make, prepare and use cabinet scrapers. But let's take the grips first.
I did most of the forming using spokeshave, knife and gouge. I used the spokeshave where I could then used the knife in the notches and the gouge for wide concave surfaces, like the fat part you grab on the grip.


Roughly forming the grip went really fast, much quicker than I had thought it would. But in return the fine tuning of everything took longer. I saved the shaft for last since a square shaft makes it much easier to clamp the paddle to the workbench.
As I mentioned I used a cabinet scraper to smooth the blade. I made this myself from an old felling saw. I used an angle grinder to cut it out roughly then fine tuned it on the bench grinder. Then just followed the standard sharpening procedure for cabinet scrapers. It worked very well, I gave it a slightly convex edge on one side and a concave on the other. And after using it and playing around a bit I found that I could attach it to an old felling saw handle for much more comfortable and effective use.



For rounding the shaft I made and used a tool described in Graham Warrens's book Canoe paddles - a complete guide to making your own. It's a small plank with two pegs sticking down and between them pencils marking the lines. The proportions should be 7:10:7 to get the lines in the right place. Then I just held it angled and drew the lines on the shaft. I also added one pencil in the middle to mark the middle line at the same time. But in the end it didn't work very well to draw all three lines at the same time so I just knocked down the pencil I wanted to draw with and repeated for each line.


Another very useful tool I made for the rounding of the shaft was a cabinet scraper shaped after the shaft. After 8-siding and 16-siding the shaft I just used this scraper to get it round. Unfortunately I didn't make this until after I finished half of the paddles. So the first ones didn't get the same perfect roundness.


I used sandpaper on the modern design ones. I started with 120 grit, then 240 and finally 600. I wet them to raise the fibers then repeated with 240 and 600 grit a few times.
Finally I oiled them with cold pressed raw oxidized linseed oil, just rubbing it in with my hand, then did a few strokes with 600 to remove any raised grains and wiped them off as much as I could with paper towels.

Cozy workplace. The blanket helps to protect the paddle when it's clamped.






onsdag 8 april 2015

Ten paddles project part one

I'm now nearing the end of my woodworking education and to sum it all up each student gets to make a final project. Some make spoons, others make bowls, a cabinet or wood burning. For me it came quite natural to make canoe paddles. And thinking practically I saw the chance to both make my paddle making more effective and hopefully make some money at the same time. So I decided to make this a serial production project. All in all I have a little less than 5 weeks. I calculated that I can carve a paddle from an ash plank in one day. So 10 paddles would be 2 weeks of carving. That gives 3 weeks for drawing the designs, writing the documentation and oiling and varnishing.
But the school I'm attending is not just a woodworking school. It's all about traditional woodworking (but they do let us use some machines). So I wanted some kind of twist and decided to make half of the paddles in a more native design aimed at deep water paddling and half in a more modern design aimed at whitewater. Though both are compromises of what I personally think is good.

I'm now at the second week, I have decided on 2 designs. The native one is an ottertail with a grip which is something like a merge between a pear grip and a northwoods grip. The modern one is a wide and short Sugar island with a T-grip. I differ the construction in them a bit. The native one is a one piece paddle which I will not sand and for finish I'll only use raw oxidated linseed oil. The modern one has a 3-piece grip and 5-piece blade to save material and lessen the chance for warping. I'll sand them till my hands bleed and give them an oil finish with a varnished blade. I'm gluing with polyurethane, I considered using epoxy but it blunts the tools really fast.

My paddle-forms with adjustable shaft length.
I made the designs in Adobe Illustrator as described in a previous post. I printed them and taped the papers together then glued them onto plywood. I was very careful here to get the forms completely symmetrical. I saw a track for the shaft in the blade to make them easily adjustable on the wood. I still needed a straightedge to keep them completely in line but it works very well and made the marking out much easier.

My initial idea was to make the modern blades in 3 pieces. But my planks were too narrow to get out 2 such wide pieces in one length so I decided to make it 5 pieces. But just gluing 5 pieces of ash together felt like it would look boring and amateurish so I wanted to make 2 small dark stripes along the center. But I didn't have any dark wood. But then I remembered something I learned a few weeks ago. Thermally modified wood. What I did was take the pieces and put them in the oven at 200 degrees for 1-2 hours. This makes them dark, a lot darker actually, and not just on the surface... all the way through. I'm not sure exactly how it affects the strength of the wood. But as they will be laminated in the middle of the blade I don't think it's a problem.

Barely fitting in the oven....
Before and after being in the oven. The dark one in the middle was on top and got a little too much heat. Also the side closer to the door is a bit brighter due to lower temperature.
So a summary of where I am right now: I've planed and marked out the 5 native designs. One of them is a stand up paddle I intend to use for myself. It feels insanely long... I give that one a thicker shaft to lessen the flex a bit.
I have cut out and planed all the pieces for the modern ones and glued one of them.
By the end of this week I intend to have glued up all paddles and cut them out.

My feelings so far for this project is that it's fun and I'm learning a lot. But I've used machines a lot this first week which is a bit depressing. I kind of regret not making the paddles by hand instead. Cutting my own tree, splitting it and carving it with an axe and crooked knife would feel much more satisfying and result in much stronger paddles. At least after I cut out the forms it's hand tools all the way till the end!

torsdag 19 februari 2015

Paddle project: Spear (pointy) blade paddle


The idea for this paddle came from a blog post on another blog. What really caught me attention was the grip, I wanted to make something similar. But the end result actually isn't very similar at all. I got a lot of new ideas along the way. The slight difference in the wood color is because I finished the shaft and blade with a tar and oil mix. And the Grip with just raw pre-oxidated linseed oil.
The reason for the spear blade was mainly because I had never paddled with one before. From what I have heard they were used for spearing fish and as weapons against other tribes. Murat, the owner of the paddle making blog told me they were used in Africa and Amazonia where the bottom is often muddy. If the blade gets stuck in the mud you just have to flip it and it gets loose. A normal blade is too wide to flip when it gets stuck.
I have a theory as well, that by putting all the impacts in the middle, where the paddle is as thickest and where the fibers go all the way through the paddle, it won't breat as easily. A wide blade can get stuck between stones and split the blade.
The shaft length is 64 cm (25") and the paddles overall length is 130cm (51"). The shaft tapers from a round shape by the grip to an oval shape towards the blade, for a good grip and better balance.
The surface is not sanded. I will go deeper into this in another blog post.