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May 21, 2012, 04:02:58 PM
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Author Topic: WMD compsand forum  (Read 5880 times)
huie
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« Reply #30 on: November 11, 2008, 07:45:06 PM »

Not trying to be a pain but you have a couple of spelling errors there Huie. (4 i think)
And what does it say after "bottom skin balsa Huh"
                   (  P M I)   polymethacrylimide
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Steve Franklin
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« Reply #31 on: November 11, 2008, 09:46:08 PM »

Not trying to be a pain but you have a couple of spelling errors there Huie. (4 i think)
And what does it say after "bottom skin balsa Huh"
                   (  P M I)   polymethacrylimide

Hi Huie, you mean Rohacell right or is someone else making PMI foam? (and hopefully selling it cheaper than Degussa)
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huie
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« Reply #32 on: November 12, 2008, 01:27:47 AM »

steve it is a bit dearer than corcell but i am likeing what i am geting
 good is not always cheap  haa
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Bernhardt
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« Reply #33 on: November 14, 2008, 06:57:00 PM »

gary young doesn't use much fibreglass on his boards, only a small amount down the length of the rails. The bamboo is the predominant fibre in gary's construction
This does not make any sense, unless the load on the board sandwich is never stressed to the point where skin fail anyway. I've been playing with graphing the stiffness of sandwich panels in scilab and the things that strikes me is how little strength the laminate have vs. the strength of a sandwich at the thickness Greg is using. Basically with the layups used and thin skins there is very little load on the core. Even with the relatively stiff bamboo core and only 2oz cloth both sides, the bamboo core by it self would be considerably less than half the strength of the sandwich.
I'm just going on what the man himself told me!
Still, it doesn't make any sense  Wink

Gary uses multiple layers of "Epoxy Saturated" bamboo veneer inplace of fiberglass.. He calls it "fibergrass".
Epoxy saturation interacts with bamboo veneer for a covering that's as strong if not stronger than the man made fabric which is basically woven flexible glass(silica) fibers. He also uses many layers not just one or two and varies the amount of layers depending on their location on the board's structure. I posted a cutaway picture of Gary's composite technique away back than Paul said was not good to show you all.. Alot of technique all in one picture.  There's also a bulletproof/hurricane resistant film he applies to the finished surface for added protection. If you think of what it does for storm proofing glass windows and bulletproofing glass car windows you can see the benefits for the epoxied bamboo skin of a surfcraft.. Surprised no one has thought of that before.

Huie and Loehr are just getting the composite process closer to the needs of a production operation without losing any benefits of the composite design. Loehr has deep ties to Warvel(who he brought in to Firewire to Bert's protest) and Resin Research which is why Paul is trying to wipe some of the fog off everyone's goggles here. I guess Greg's due some reward for all the years he's put in to the tech.
 
Huie I found this stuff called "Last-a-Foam" 6lb density and way cheaper than corecell with a similar texture. Is that it or is it Rohacell which is notoriously expensive being that it's used for yahts, planes and F1 racers.
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huie
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« Reply #34 on: November 14, 2008, 08:36:36 PM »

bernie
            i am supplying  feed back to my man here in oz for rohacell
there interested in marketing a special 3mm sheet for the surfboard industry
& when they can run this one line the price will be right
remember the aero space guys are eating it all up  there got all the money
bern i have been using 55kg rohacell & i am thinking this is the wheight they should go whith
so the more we use it & give feed back the  the quicker it will come in to play

    p s
           c d d blank is nothing like what greg is doing
 lets put it this way  we could give one off these to griff& whith out any extra effort
 he could produce a higher performance board than he is doing now
plus we can build a blank to any type flex you would want

    we got the pros wanting it
its all geting to much for me?
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huie
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« Reply #35 on: November 14, 2008, 08:42:42 PM »

in case you have not seen thishttp://s537.photobucket.com/albums/ff336/HUIESHAPES/?action=view&current=P1020457.flv
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huie
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« Reply #36 on: November 14, 2008, 08:49:04 PM »

in case you have not seen this
http://s537.photobucket.com/albums/ff336/HUIESHAPES/?action=view&current=P1020457.flv
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paul cannon
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« Reply #37 on: November 15, 2008, 04:31:58 AM »

scored 1o, 3 meter  6 by 2s of cedar today
and some redwood
bernie i gotta apologize for some of the stuff ive been saying over at surfermag
i hope you know i got nothing against americans
its just the easiest way to have a dig Smiley
i figure some of them deserve a bit of a rark up
with all the crap they lay on roy
he really is a nice guy
of course my house is your if you ever land in town
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soulvoid
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« Reply #38 on: November 16, 2008, 04:47:12 PM »


Huie I found this stuff called "Last-a-Foam" 6lb density and way cheaper than corecell with a similar texture. Is that it or is it Rohacell which is notoriously expensive being that it's used for yahts, planes and F1 racers.
Last-a-foam is PU
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soulvoid
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« Reply #39 on: November 18, 2008, 06:46:48 AM »

Gary uses multiple layers of "Epoxy Saturated" bamboo veneer inplace of fiberglass.. He calls it "fibergrass".
Epoxy saturation interacts with bamboo veneer for a covering that's as strong if not stronger than the man made fabric which is basically woven flexible glass(silica) fibers. He also uses many layers not just one or two and varies the amount of layers depending on their location on the board's structure. I posted a cutaway picture of Gary's composite technique away back than Paul said was not good to show you all.. Alot of technique all in one picture.  There's also a bulletproof/hurricane resistant film he applies to the finished surface for added protection. If you think of what it does for storm proofing glass windows and bulletproofing glass car windows you can see the benefits for the epoxied bamboo skin of a surfcraft.. Surprised no one has thought of that before.

I think surftech uses a similar layer of plastic on some boards. I wonder if that qualifies as an outer laminate? Depending on the stiffness and thickness of the material it might create a sandwich effect. Sure better than the thick polyester layer on woodtech boards either way. 
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