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Does detuning prevent edge delamination?

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Rice
Posts: 311 - Karma: 2,228
Last year my chronics delaminated heaps.

Luckily, I got it warranted and got a new pair.

I was thinking of detuning underfoot, but will this actually prevent edge delamination? Or is it just bad construction which contributed to it delaminating.

Below is a picture of the ski after 3 days of use, with delam already starting to happen.


Jun 30 2016 9:35PM
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hot.pocket
Posts: 4197 - Karma: 10,366
Detuning park skis underfoot is to help prevent your edge from cracking, whereas this is a bad bond.

Good thing you warrantied them, 95% of the time this is a construction issue and falls under a companies warranty.
Jul 1 2016 12:05AM
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DominatorJacques
Posts: 11228 - Karma: 76,274
A long base bevel on the base edge will help a bit, but nothing will hold out to heavy banging. Learn to be as smooth as possible!
Jul 1 2016 11:16AM
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Dddsz
Posts: 3042 - Karma: 7,328
Nah line skis are just ass.
Jul 2 2016 12:23PM
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rozboon
Posts: 1642 - Karma: 868
It does help, somewhat. Some delamination is just from a crap batch of epoxy or poor spread in the layup resulting in a weak section, in which case warranty all day.

But thinking about the forces when you're sliding a rail, if your downhill edge catches even slightly then the edge is trying to flip your ski up on it's side whereas your weight is forcing the ski flat which will apply a significant twisting force to the edge, which can result in it pulling away from the layer above. Edges aren't really made to take a downward force.

If you detune the edge underfoot then there's less chance of this happening.
Jul 6 2016 4:09PM
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DominatorJacques
Posts: 11228 - Karma: 76,274
rozboonIt does help, somewhat. Some delamination is just from a crap batch of epoxy or poor spread in the layup resulting in a weak section, in which case warranty all day.

But thinking about the forces when you're sliding a rail, if your downhill edge catches even slightly then the edge is trying to flip your ski up on it's side whereas your weight is forcing the ski flat which will apply a significant twisting force to the edge, which can result in it pulling away from the layer above. Edges aren't really made to take a downward force.

If you detune the edge underfoot then there's less chance of this happening.


I agree. I mentioned doing a "long base bevel" prior. One may not know WTF I'm talking about so here is a link that will take you to the point in one of my videos so you can understand what a "long bevel" is.


https://youtu.be/H96_dAgeHRs?t=1m16s
Jul 7 2016 6:56PM
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brett_fisher
Posts: 2417 - Karma: 10,493
any decent shop detunes edges when they mount i alway ask mine to be extra de tuned so they don't crack and like a duller edge and edge detune has nothing to do with your problem
Jul 8 2016 10:25PM
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