Hi Mark, something that might be useful, if you multiple half the width by the tangent of the angle it will give you the sheer. So for a 20 inch wide boat, with a 20 degree flare (tan .363) you'd times 10 x .363 giving you a sheer of 3.6 inches. Interestingly if you look at a lot of historic boats their sheer minus any obvious wedge additions nearly matches this, but often not quite. I am convinced that this is because wood milled from driftwood always springs badly due to the fact that driftwood often used to be curved trees with much tension that overhung on cliffs before meeting it's demise. (I know this from experience milling exactly these types of logs) It was this realization that led to me laminating gunnels. The Tahe is a different story however, the reason people like it is because it has a stability that no boat of a natural sheer curve would. It's not a real Greenland boat in this sense, which is why it paddles much better, and you correctly surmise that the only way to get this shape is to curve the gunwales somehow. Hope that formula helps. You do great work, love the models.
That's very interesting Brian. I generally chuck my calculator and tape measure out the door when I start doing any kayak building.I like to fully embrace the anthropometric and sculptural approach. I especially like to do this whenever an engineering oriented customer comes along. It makes them kind of uncomfortable at first but they tend to relax pretty quickly and give themselves over to this organic approach. I'll have to bust out the calculator on the next one. Thanks for your input. Much respect for your work as well. We'll have to get together some day.
I'm probably the least mathematically inclined person there is, but I like to keep this one in my back pocket because it's so handy for what we do. @@Nomadboatbuilding
Hi Mark, love your channel and workmanship. Is the Softahe series still available, the link in the description just refers back to this one video, thanks!
While that might be the best way to replicate the sweep of the sheer, I try to stick to traditional methods of construction as much as possible for these kayaks. It’s both for reasons of time management as well as the challenge of working within the confines of the methods and materials. I’m building another one of these Tahe interpretations right now and went with a sawn lamination glued to one side if the gunnel. Basically ripped a wedge off one side and glued it back on the other.
Saved to playlist. I want to build one of these👍
You've certainly got the skills Ray. And, I imagine, the scraps.
Still today
I really like these videos.
Great channel
Glad to hear it!
Hi Mark, something that might be useful, if you multiple half the width by the tangent of the angle it will give you the sheer. So for a 20 inch wide boat, with a 20 degree flare (tan .363) you'd times 10 x .363 giving you a sheer of 3.6 inches. Interestingly if you look at a lot of historic boats their sheer minus any obvious wedge additions nearly matches this, but often not quite. I am convinced that this is because wood milled from driftwood always springs badly due to the fact that driftwood often used to be curved trees with much tension that overhung on cliffs before meeting it's demise. (I know this from experience milling exactly these types of logs) It was this realization that led to me laminating gunnels. The Tahe is a different story however, the reason people like it is because it has a stability that no boat of a natural sheer curve would. It's not a real Greenland boat in this sense, which is why it paddles much better, and you correctly surmise that the only way to get this shape is to curve the gunwales somehow. Hope that formula helps. You do great work, love the models.
That's very interesting Brian. I generally chuck my calculator and tape measure out the door when I start doing any kayak building.I like to fully embrace the anthropometric and sculptural approach. I especially like to do this whenever an engineering oriented customer comes along. It makes them kind of uncomfortable at first but they tend to relax pretty quickly and give themselves over to this organic approach. I'll have to bust out the calculator on the next one. Thanks for your input. Much respect for your work as well. We'll have to get together some day.
I'm probably the least mathematically inclined person there is, but I like to keep this one in my back pocket because it's so handy for what we do. @@Nomadboatbuilding
Cape Falcon Kayak I'll be sure to stuff it into my back pocket as well. Definitely going to play around with that math.
You just have to go down to my local big-box store to find wood with that amount of shear 🤣
Timesaver!
Hi Mark, love your channel and workmanship. Is the Softahe series still available, the link in the description just refers back to this one video, thanks!
There is no series in that one. Just this little discussion on the design process.
The best option might be to laminate the sheer, that way you can build all the bending you want
While that might be the best way to replicate the sweep of the sheer, I try to stick to traditional methods of construction as much as possible for these kayaks. It’s both for reasons of time management as well as the challenge of working within the confines of the methods and materials. I’m building another one of these Tahe interpretations right now and went with a sawn lamination glued to one side if the gunnel. Basically ripped a wedge off one side and glued it back on the other.
Well done
Now I understand very well. I wish I had access to this wood...
Jean-José Tritz it’s lovely stuff. Try calling Stone and Sons boatyard in England. They were importing a lot of it for a while there.
Jean-José Tritz it’s lovely stuff. Try calling Stone and Sons boatyard in England. They were importing a lot of it for a while there.
Nomad Boatbuilding Thank you! When the time comes I will have a look. I'm still busy with earning money for the roof over my sof canoe...