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 Post subject: Re: Cedar Board Layup Advice
PostPosted: Thu Aug 30, 2012 9:09 pm 
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Joined: Tue Aug 21, 2012 2:03 pm
Posts: 6
Well that makes things more confusing!?!
What if I induce rocker by weighting the board on the rocker table for a few weeks to create all nearly all of the rocker I desire, then say increase the rocker the final 25% or so under vacuum to set the final shape give or take.
This should reduce the spring back and thus the shear stress on the composite reducing potential of future twisting or delamination under riding stresses. Any thoughts?


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 Post subject: Re: Cedar Board Layup Advice
PostPosted: Thu Aug 30, 2012 9:43 pm 
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Joined: Thu Jun 05, 2003 3:37 am
Posts: 2320
Take the thickness down by 1-2mm overall esp. at tips, glass with 2x 6oz on deck or 6oz + some unis or warp cloth. Plan to lose lots of rocker off the table, don't worry it will work out. And if not, curved base fins are always good for an extra mm or two of rocker.


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 Post subject: Re: Cedar Board Layup Advice
PostPosted: Thu Aug 30, 2012 9:59 pm 
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Joined: Tue Aug 21, 2012 2:03 pm
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Cheers BWD, I'll get busy with the planer and sander and reduce the core to 9/10mm thinning to 3mm at the tips, set the rocker table to 80mm and see what happens


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