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Snapped core

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will_powder
Posts: 3194 - Karma: 5,445
I bought a pair of atomic patent's 09/10 185, at a ski swap for $15. One of the skis is mint, but the other one has a snapped core a fifth of the way up the ski from the tail. I bought the skis for use in my backyard and the toboggan hill. Is there any way to fix this?

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Oct 17 2010 3:44PM
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.cam.
Posts: 1852 - Karma: 48
*Disclaimer: I have never done this nor do I know if it works. I am only assuming it might.

If you were to epoxy it and clamp it together it might stay together for a little while but i am not sure how long it would last.
Oct 17 2010 3:50PM
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will_powder
Posts: 3194 - Karma: 5,445
Yeah i was sorta tinking that i could get some carbon strips and add epoxy to that...
Oct 17 2010 3:58PM
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.cam.
Posts: 1852 - Karma: 48
maybe even fiberglass
Oct 17 2010 5:21PM
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tomfallon.
Posts: 104 - Karma: 49

add a stringer made of a carbon/fibreglass stringer.

or maybe even dowel?

Oct 17 2010 6:48PM
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AlexF
Posts: 271 - Karma: 206
Sorry, these methods won't work. Adding stringers to the top of the ski or reattaching the top sheet with epoxy provide the ski with material to take the compressive loads when the ski bends. However, the core will still be broken and unable to carry the shear forces that arise during bending so the ski will buckle here.
Oct 18 2010 11:44AM
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.cam.
Posts: 1852 - Karma: 48
even if you were to almost fill the core with epoxy. i realize it wont be anything like new but still would it stay together?
Oct 18 2010 6:29PM
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rozboon
Posts: 1642 - Karma: 868
Depends how the core snapped.
Hard to say from the pics. If it's a long, layered break with lots of bits sticking out and you epoxy the hell out of it and clamp it then it may just act like a finger-jointed piece of wood (which cores often have anyway) and hold up for a while.
If it's a clean break through the core and has just caused the topsheet to buckle like that then I'd say the first time you ski it it will fold up again.
Oct 18 2010 7:12PM
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summersover
Posts: 5777 - Karma: 233
i may not be offering a fix but i know patents are known for having weak cores so there is a decent chance someone might have an extra un broken ski they might sell you cheap if you put up an WTB in B/S/T
Oct 18 2010 7:20PM
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will_powder
Posts: 3194 - Karma: 5,445
the brake is long and layered and not too deep, if you understand that. I'm going to fill the core with epoxy and clamp it like hell. Then I will put one layer of fiberglass on top, then some carbon strips, then another layer of fiberglass. Anyone have a good cold weather epoxy?
Oct 18 2010 7:46PM
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will_powder
Posts: 3194 - Karma: 5,445
also would wood filler work?
Oct 18 2010 8:56PM
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rozboon
Posts: 1642 - Karma: 868
Hell no. Wood filler is for doing exactly what the name suggests.

You want a good epoxy resin and some smallish flat bits of wood at the very least to spread the clamping force over the whole break. Just absolutely soak it in resin, make sure it gets into the core and all. Put tinfoil over the topsheet and base so your clamps don't stick to them then clamp the heck out of it. It'll be ugly as hell but it just might work.
Be careful with the resin, it's nasty stuff.Assume anything you get it on you'll never be able to get it off. And wear gloves.
Oct 19 2010 12:15AM
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RudyGarmisch
Posts: 25443 - Karma: 13,845
You can sand it off if you're careful. Wear a respirator.

Also, most resins will bond weakly to plastics... go check the scrap bin at a TAP plastics for some.
Oct 19 2010 12:18AM
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AlexF
Posts: 271 - Karma: 206
If the break is largely confined to one layer you may have a chance of getting some use out of it. However, this would require getting epoxy into all the gaps and most adhesive epoxy would be too thick. Normally the epoxy will become less viscous if you heat it up which will help get it into the gaps. The downside is that a 10 degree increase in temp will typically halve the cure time. If you can get some laminating resin you might have a shot but I wouldn't be too hopeful
Oct 20 2010 11:48AM
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will_powder
Posts: 3194 - Karma: 5,445
BUMP

I ended up putting some marine epoxy inside the ski and then some fiberglas mat on top of the ski. See crappy pics. The ski feels like it is pretty strong torsionally, and good enough for some backyard rails.

Patent's are symmetrical, so should I mount the skis backwards?
Nov 5 2010 12:49AM
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Bossgdi
Posts: 81 - Karma: 13
really really strong epoxy two plates and 3 really strong clamps. and set for 48 hours.
Nov 5 2010 2:12AM
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will_powder
Posts: 3194 - Karma: 5,445
bump, please read 2 up^^^^
Nov 13 2010 1:35PM
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a_pla5tic_bag
Posts: 9210 - Karma: 5,357
i'd think not. cause i figure you have more of a chance landing backseat and snapping them than you do landing to far forward.
Nov 13 2010 1:41PM
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Boggs
Posts: 1039 - Karma: 208
bahahahaha those are matts.
Nov 13 2010 1:55PM
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Willard
Posts: 5117 - Karma: 429
glad i didnt buy them this year
Nov 13 2010 9:31PM
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Yung_Gnarley
Posts: 9091 - Karma: 3,016
monoski
Nov 13 2010 9:37PM
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will_powder
Posts: 3194 - Karma: 5,445
the problem is in the tail......
Nov 14 2010 1:13PM
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will_powder
Posts: 3194 - Karma: 5,445
Yea i know. He said he thought that someone would make a chair out of them or something.
Nov 14 2010 1:13PM
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