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Which type of core is the flexiest?

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270on420out
Posts: 7494 - Karma: 50,825
?
Mar 25 2015 12:56PM
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-emile-
Posts: 6610 - Karma: 8,583
I'd be tempted to say bamboo but I really have no idea so don't take my word for it.

then again it might be sand, I heard the osama pros were flexy as fuck
Mar 25 2015 1:15PM
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last_tango
Posts: 2635 - Karma: 2,665
Sandcore in the osama pros
Mar 25 2015 1:18PM
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elcornholio
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The core has surprisingly little to do with the stiffness of the ski. The strength to weight ratio of fiberglass is stronger than steel, so I'd say the stiffest core would be no core/Solid fiberglass. The flexiest would be a ski layered with rubber and probably a pine core. Hope this helps.
Mar 25 2015 1:33PM
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Pmoore
Posts: 1802 - Karma: 1,246
elcornholioThe core has surprisingly little to do with the stiffness of the ski. The strength to weight ratio of fiberglass is stronger than steel, so I'd say the stiffest core would be no core/Solid fiberglass. The flexiest would be a ski layered with rubber and probably a pine core. Hope this helps.


Correctish. Only the thickness (profile) of the core really effects how stiff the ski is. An all fiberglass ski is completely irrelevant. That many layers of fiberglass or even carbon would be way too heavy to be even close to a relevant ski. You need a core of some sort.

Another way to look at it would be how you can build the ski around certain cores. For example Balsa core skis have to be fairly stiff because the core is not as strong where as a maple/poplar or bamboo core has more strength so you can have a softer ski without risking snapping the core.
Mar 25 2015 1:41PM
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John18_6
Posts: 7313 - Karma: 49,158
Balsa wood is where it's at Holmes
Mar 25 2015 1:48PM
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shin-bang
Posts: 4100 - Karma: 6,992
last_tangoSandcore in the osama pros


i rode the osama pros the other day. they were having a demo day. those things are superrrr butterrryyyyy. probly because of the sandcore technology
Mar 25 2015 4:47PM
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veng_m
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aspen
Mar 25 2015 5:30PM
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.lencon
Posts: 6753 - Karma: 17,178
-emile-I'd be tempted to say bamboo but I really have no idea so don't take my word for it.

then again it might be sand, I heard the osama pros were flexy as fuck


Bamboo varies. So many types of bamboo and factors with bamboo.

elcornholioThe core has surprisingly little to do with the stiffness of the ski. The strength to weight ratio of fiberglass is stronger than steel, so I'd say the stiffest core would be no core/Solid fiberglass. The flexiest would be a ski layered with rubber and probably a pine core. Hope this helps.


This is correct. You could have a core made out of titanium, but if its thin enough, you're going to butter. Thickness of core is a pretty good factor.

To try to answer your original question, paulownia is pretty soft.
Mar 25 2015 7:18PM
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RudyGarmisch
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Ya'll forgetting the power of foam core. Stiff on day one, but on day 20...
Mar 26 2015 1:21AM
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K.Breit
Posts: 211 - Karma: 143
RudyGarmischYa'll forgetting the power of foam core. Stiff on day one, but on day 20...


By far you'll end up with the softest ski if your core is foam.

Bamboo without carbon/kevlar reenforcing is fairly soft, but the amount of fiberglass also will effect it, more/heaving fiberglass means more epoxy in the ski which means added stiffness.

Here is a table of common woods used in cores (it doesn't cover bamboo) and their stiffness, strength, and relative weights from skibuilders.com





Along with that, if you are so inclined to read a report on cores:

http://www.skibuilders.com/articles/EffectsofCore.pdf
Mar 26 2015 6:54PM
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