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Estimating weight of fiberglass over foam core

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aeroallan

Active Member
Joined
Apr 3, 2008
Messages
26
Location
NE
Hi fiberglassers,

I am estimating the non-load-bearing weight of an enclosed wing and need the benefit of your experience.
(By non-load-bearing, I mean neglecting spars, sparcaps, and torsion boxes.) This is simply one or more layers of fiberglass epoxied over styrofoam core.


I understand the styrofoam weighs 2# per cubic foot. The S2 glass-woven 2533 weighs 5.4 oz. per sq. yd. dry. How much should I figure it weighs for 2 plies after epoxying ? What about 3 plies after epoxying ? I'm talking about cured weight.

I understand vacuum-bagging reduces the weight by 25%, but I don't plan on using that for my first attempt.

Allan
 
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