Critique My Layup....

For discussions related to ski/snowboard construction/design methods and techniques.

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MontuckyMadman
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Post by MontuckyMadman »

yeah the core has a big swollen spot, and that ash is stiff, I flexed the core again today and its pretty stout.
I think I'm going naked and if its fuct I can drop some heavier uni on top and repress with the topsheet.
I just have to experiment. I cant make the same thing twice.
sammer wrote: I'm still a tang on top guy.
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falls
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Location: Wangaratta, Australia

Post by falls »

Sorry SHIF, it must (might?) be the Dr that uses the heat to create camber.
I have been heating only from above and leaving to cool under pressure overnight also and I think my skis pretty well reflect the molds I have.
I also haven't had any problems with screw retention in my bamboo cores without any binding area reinforcement. I'm not dropping 100 footers, but think I give the skis a decent workout.
The skis I ski now have a 12.5mm bamboo core at centre, no carbon. I might take your idea of dropping core dim by 1mm and adding carbon to try and reduce weight a little.
The carbon I have is 65mm wide unidirectional. It is 200g/metre squared which I think is about 6 0z/square yard.
Don't wait up, I'm off to kill Summer....
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Brazen
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Post by Brazen »

I can reduce the camber in my molds 50% by heating top only under pressure. Try bottom next time falls and see...
"86% of the time it works 100% of the time".
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MontuckyMadman
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Post by MontuckyMadman »

what about triax on the bottom and carbon on top?
sammer wrote: I'm still a tang on top guy.
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falls
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Post by falls »

no reason why not
top layer is more in compression than tension (although every layer experiences tension and compression). Is carbon better in compression or tension? Engineer.....
Don't wait up, I'm off to kill Summer....
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MontuckyMadman
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Post by MontuckyMadman »

I understand carbon to be more effective in compression. Hence my choice for this uni weave and on top of the core maybe. We shall see tonight!!
sammer wrote: I'm still a tang on top guy.
Richuk
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Post by Richuk »

The papers I have found point to CF being weaker in compression, not by a sizeable amount. Arguably the CF is not in compression.

The thing to worry about it whether the CF is kept straight and thus able to support the load
Richuk
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Post by Richuk »

The papers I have found point to CF being weaker in compression, not by a sizeable amount. Arguably the CF is not in compression.

The thing to worry about it whether the CF is kept straight and thus able to support the load.

Good luck!
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