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On plywood and glass

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(@Anonymous 13024)
Posts: 4319
Topic starter
 
[#25172]
Quote
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
pgp
 pgp
(@pgp48)
Posts: 4470
Member
 

I was thinking about foils for my Blade. Could you just make a

boot

? Slip on slip off?


 
Posted : May 27, 2009 2:34 pm
(@Anonymous 13024)
Posts: 4319
Topic starter
 

I did not quite understand the question. You consider new foils for your Blade, that I got. But where are the

boots

to go? Outside the current foils?


 
Posted : May 27, 2009 4:27 pm
pgp
 pgp
(@pgp48)
Posts: 4470
Member
 

Attached to the rudders, anti-pitch device.


 
Posted : May 27, 2009 4:53 pm
(@Anonymous 13024)
Posts: 4319
Topic starter
 

You could do it, but I think that would be more work than doing a custom set of rudders with the T foils.


 
Posted : May 28, 2009 1:39 am
(@Anonymous 12203)
Posts: 434
 

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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