Foam Sandwich

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Old E.
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Foam Sandwich

Post by Old E. » Fri Jan 13, 2006 10:02 am

Hi,
Recently I have been reading about the use of "foam sandwich" to build these boats. I just don't under stand how. Are you supposed to take the prefinished panels and stitch them together like you would the plywood, or are you supposed to use regular (unfinished) Divinicell around a mold like the Phoam Phantom?
:doh:
How different is the building process when using foam?

Thanks



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tech_support
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Post by tech_support » Fri Jan 13, 2006 10:10 am

See my gallery of buildign a ph16 from foam sandwich.....

http://gallery.bateau2.com/thumbnails.php?album=164

Joel

Old E.
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Post by Old E. » Fri Jan 13, 2006 11:18 am

That link isn't working for me.

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UncleRalph
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Post by UncleRalph » Fri Jan 13, 2006 11:23 am

Old E. wrote:That link isn't working for me.
Take the [/url] off the end.

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Post by Old E. » Fri Jan 13, 2006 11:42 am

Thanks, that worked.

So you build a mold ant bend the foam around it. Was there a separate set of plans for the male mold? Not sure I understand how that was made.

Is there a substantial weight savings?

here is a strange question. Why were the "spot welds" and seams pink? It looks like polyester resin.

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tech_support
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Post by tech_support » Fri Jan 13, 2006 11:51 am

spot welds are epoxy and micro balloons. I used the regular plans, but you have to take into account the thickness of the foam and offset accordingly.

There have been several posts on how much weight you can save. Basically the best way is to have a hull of plywood sandwich, and the insides foam core and/or nida-core. Try a search.

anonymous

foam core

Post by anonymous » Fri Jan 20, 2006 8:52 pm

Hey Shine,

Did you use polyester or epoxy? Also did you vacum bag the glas to the core?

Regards,
Niels
Jax, FL

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tech_support
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Post by tech_support » Fri Jan 20, 2006 9:51 pm

I vacuum bagged all the inside parts (flat parts are easy). I used all epoxy.

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Post by jacquesmm » Sat Jan 21, 2006 10:10 am

In the plans for all foam sandwich boats, we include drawings showing how to use the existing dimensions to build the jig, it is just an offset.
We also include the foam and fiberglass specifications, different from the plywood version and details drawings showing how to bond frames, attach hardware etc.
Jacques Mertens - Designer
http://bateau.com

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Mike Adams
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Post by Mike Adams » Sat Jan 21, 2006 7:15 pm

I've read a lot of comments on this forum about vacuum bagging of foam . The idea intrigues me, especially for cabin sides/roof, etc., but I must admit to being a bit nervous about trying something that seems so very different to any other building techniques I've ever experienced.

I know Joel does it all the time at Vero Beach, but how easy is it for someone with absolutely no experience to do? What equipment do you need to have for this process and how do you get started?

Any advice or pointers to useful info on the subject would be appreciated.
Thanks,
Mike
FL14 "Lake Dreamer" built.

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