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        Discussion wing vaccum bagging and fiberglass

#1 le fou Dec 31, 2012 07:59 AM

wing vaccum bagging and fiberglass
 
Hi,

I am going to sheet my foam cores with balsa but I was wondering if anybody has ever used fiberglass fabric between the foam cores and the sheeting for added strength. I was thinking of using 3/4 oz weight for the fiber glass fabric and to either use epoxy resin or something like gorilla glue. The wings are for a laser 200 25%

Thanks for your inputs,

Le fou

#2 ScorpionRacing Dec 31, 2012 10:25 AM

Le Fou,
I do it all the time for my 424 & 426 class pylon racer wings. I do the very thin v-tails (http://sempra.org/phpBB3/viewtopic.php?f=8&t=35) and the main wing (http://sempra.org/phpBB3/viewtopic.php?f=8&t=34) very similarly. By adding some fiberglass cloth in the trailing edges, it allows me to really thin the TE and have it remain very stiff.

I do not like using the polyurethane glues however; it is no where near the stiffness of the laminating resin wings.

Best wishes,

Scott Smith
NMPRA district 7 VP
SEMPRA President


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