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Old 02-02-2010
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What weight is the green code Divinylcell foam. I'd point out that you may want to weight the rudder so that it is neutrally buoyant or a bit heavier than water...so that it doesn't tend to float up.

I wouldn't use uni-glass in this application, since the loads are going to be multidirectional. Triaxial roving would be a good material to use...with some regular cloth or CSM over it to protect it from the fairing/sanding process.

I'd also recommend putting in a layer or two of kevlar, preferably under CSM/cloth but over the triaxial roving. The reason I'd add the kevlar is that it is highly abrasion and puncture resistant.

I wouldn't use Carbon fiber in a rudder, since the carbon fiber can cause galvanic issues with metal hardware, which the fiberglass and kevlar will not.

Hope that helps.
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You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
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