Gore wood canoe construction

[Jim Dodd]

Saw this on Youtube, and had to share.
https://youtu.be/_3dsSCrxnAE

I think this method could be adapted to use foam.

What do you think Stripperguy ?

 

[deerfly]

interesting, I wonder how he keeps it from wanting to twist without a female mold.

This guy appears to at least have a bit of a form.
http://flo-mo.weebly.com/gorewood-14-solo-canoe.html

looks like the same guy...

https://plus.google.com/photos/110113600099233990156/albums/6028954635110595585?banner=pwa

 

[stripperguy]

I'm shocked that the dude could get such a uniform shape!!
The initial layout reminds me of my early years on a drafting board, man I disliked those projections. I suppose any modern 3D modeling program solves those issues, as long as you can print full sized drawings. (I recently bought an ancient HP DesignJet for just that purpose)
Thinking about the layout and those relief cuts, I don't know if my 3D modeling can develop them. A flat pattern layout might need to be made first, then hand calculated relief cuts based on the variations in stem to stem distance at multiple waterlines...hmmmm, gotta think about that a bit.

Not sure how the Divinycell would like being contorted like that. When I was gathering stuff to send to you, I accidentally snapped a piece that I flexed too far.
Strategically placed heat could certainly help the foam to submit to your will, but I'm thinking female forms, and narrower pieces of foam would be more reliable.

Pretty sure you're gonna be lead on this, I'm expecting to be homeless soon and all the fun will be on hold for a while.

 

[deerfly]

ok, its looks like the tension of the inwale glued up with the reliief cuts bowed up at the ends before the big fold over first provides some of that stability and form.

I've done a little work with divinycell and agree it would be difficult. The relieve cut sheets normally used in a mold wouldn't be as stable as the full Okoume sheets and divinycell board without the relief cuts would be difficult to progressively form like that without constant heat and given the time it appears to take to progressively coach the hull into shape here means you'd be basically have to work in an oven.

I would think a female mold and heat would be a must to do this with foam and an expensive experiment. Frankly the Okoume may actually be a better solution structurally and weight wise after coating in glass anyway. Other than eliminating wood for the sake of eliminating wood I'm not sure you end up with a better product.

 

[Muskrat]

He posts over on the woodenboat forum and boatdesign.net. All your questions can be answered over there. Username is flo-mo. I printed out some full size patterns of his when I had access to a very large format printer. Never built one, more of a just in case. It's not perfectly fair where the relief cuts are. It's actually the same concept as a birch bark canoe, but he plans out his relief cuts instead of doing it on the fly.