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Old Feb 12, 2004, 06:44 AM
CDignition is offline
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Hollow Molded are they made??

I have a has hollow is this done??...the edges are so sharp and straight, it is amazing....
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Old Feb 12, 2004, 12:03 PM
marctrudeau is offline
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Dear CD,

From what I understand, the glass/balsa/glass/carbon-spar-cap-and-leading-and-trailing-edges wet (with epoxy resin) layup is put into a precise female mold, then either vacuum-bagged or pressed together with a matching male mold, and allowed to cure. This makes one half. The two halves and glass/balsa/glass laminated spar and root rib are then jigged together and glued along the edges, like a molded plastic model, forming the finished wing.

Some of that is conjecture, but I think it's more or less correct.

Old Feb 12, 2004, 12:35 PM
SoarNeck is offline
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That's about right, but I don't think many are done with a matching male mold. You'd never be able to play with different thicknesses of skin/layup, or at the minimum you'd need a bunch of male forms. Some use foam bagged into the female mold (Prodij, new Encore etc), but it's not quite the same.

For exact details of F5B models, wander over to the High Performance electric forum.
Old Feb 13, 2004, 04:17 PM
jofo1 is offline
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there is a great thread illustrating the entire process in the High Performance Forum of Ezone, it is an F5B project.

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