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On plywood and glass
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Mixing ply and uni glass is not efficient. Ply has a stretch to failure of less than 1%. The uni is about 6%. So the ply has to fail completely before the glass is helping but about 17%. Better to use carbon with plywood in that case. Similar stretch to failure.
Something I had not thought about, but which explains my failed ply and glass foils <img src="<>/smile.gif" alt="smile" title="smile" height="15" width="15" />
Posted : May 27, 2009 2:23 pm


So, what about the design of these T-Foils?
1. Symetrical, can they be fairly flat?
2. Near the bottom of the rudder.
3. How much surface area?
4. Triangle shaped? Rectangular? High Aspect?
5. Zero angle of attack with boat level. When is the boat level? Or zero when the transom is just clear of the water?
Posted : May 28, 2009 5:16 pm
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