divinycell question

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nordmann
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divinycell question

Post by nordmann » Tue Oct 10, 2006 3:22 pm

Hi


What thickness/quality on the foamcore material, on a boat like the cs25 or the TW28?

Thanks


building gv17, D4

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jacquesmm
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Post by jacquesmm » Tue Oct 10, 2006 3:33 pm

It depends . . .
Usually, I would specify around 5/8 for the hull.
BUT there is much more to it than foam thickness.
Much much more, don't take any chances.
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nordmann
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Post by nordmann » Tue Oct 10, 2006 3:48 pm

It depends . . .
Usually, I would specify around 5/8 for the hull.
BUT there is much more to it than foam thickness.
Much much more, don't take any chances.

Yes I understand that, but if I choose divinycell, should I ask for, lets say H80 or H130?
Reason for my question is that plywood is very expensive in Norway, but I don't know the prices on divinycell yet. If the difference is low, I think foam maybe suits me better.
building gv17, D4

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Post by jacquesmm » Tue Oct 10, 2006 3:56 pm

As I wrote, it is very different and it will cost more, guaranteed.
You can not substitute foam for plywood. If you build from foam sandwich, you will have to use much more fiberglass. In some cases more than twice the amount fo fiberglass.
We specify H80 but that's irrelevant.
You need ac omplet lamination schedule.
If you want to estimate cost, double the amount of glass and resin.
Jacques Mertens - Designer
http://bateau.com

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Post by nordmann » Tue Oct 10, 2006 4:05 pm

Ok, thanks. Didn't think of the extra resin and fiberglass. Think I better stick to the plywood then. :)
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Post by nordmann » Fri Jan 26, 2007 8:54 am

Is all the instructions, lamination schedules, etc for foam, included in the TW28 plans?
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Post by nordmann » Wed Jan 31, 2007 7:49 am

hmm. The study plans for the TW 28 says: Material: Composite plywood or foam.
It maybe seem like a stupid or unnecessary question, but to avoid misunderstandings before I buy the plans, I ask again: Does the plan include everything I need for the foam version?
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Post by jacquesmm » Wed Jan 31, 2007 8:54 am

Right now, the foam sandwich specifications are a separate file but I will include it in the notes.
There isn't much to it: just the scantlings, that means the material specifications, the lamination schedule.
Nothing elses changes. The final weigth will be a little bit less but that is compensated by a little bit more trim ballast.
Jacques Mertens - Designer
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Post by nordmann » Wed Jan 31, 2007 9:14 am

Ok thanks. Ordered the plans two seconds ago! 8)
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Post by nordmann » Tue Feb 13, 2007 5:42 am

jacquesmm wrote:Right now, the foam sandwich specifications are a separate file but I will include it in the notes.
There isn't much to it: just the scantlings, that means the material specifications, the lamination schedule.
Nothing elses changes. The final weigth will be a little bit less but that is compensated by a little bit more trim ballast.

Hi jacquesmm

I have received the plans, and it looks excellent. The foam sandwich spesifications wasn't there, but could you send it to me like a pdf file when it's ready?
I will not start the building before late summer, so there is no hurry..
building gv17, D4

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