Whats your experience with your first few pair of skis/boards how did they turn out? Too soft or too stiff?
From what Ive read my guess is that alot of skis endup to stiff in the begining. Would be interesting to hear what you have experienced.
Tex
Too soft or too stiff?
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hugocacola
- Posts: 191
- Joined: Thu Mar 22, 2007 8:00 am
i had real luck on the first skis: their flex was just perfect.
then on the second pair, wich was actually 10cm shorter than the first, i really underestimated the effect of the shorter lenght in conjunction with a similar core thickness as on the first pari - they were too stiff.
then came the first rockered pair, which became a little too soft. it had about the same flex as the first one which was too soft for a rocker.
now i somehow found the balance and stiffness for my rockered construction...and they are pretty stiff so you can ski them quite hard
but for a ski around 170-175cm i think it`s good to start with a core thickness of about 11mm, 12cm platform in front of the middle and 20 in the back, tapering down to 2-3mm in tip and tail and to use one layer of 200oz triaxial on top and below it. or instead of triaxial you could use one layer of 308g biaxial on top and below plus 2 layers of unidirectional 220g below and one layer unidirectional 220g on top of it.
then on the second pair, wich was actually 10cm shorter than the first, i really underestimated the effect of the shorter lenght in conjunction with a similar core thickness as on the first pari - they were too stiff.
then came the first rockered pair, which became a little too soft. it had about the same flex as the first one which was too soft for a rocker.
now i somehow found the balance and stiffness for my rockered construction...and they are pretty stiff so you can ski them quite hard
but for a ski around 170-175cm i think it`s good to start with a core thickness of about 11mm, 12cm platform in front of the middle and 20 in the back, tapering down to 2-3mm in tip and tail and to use one layer of 200oz triaxial on top and below it. or instead of triaxial you could use one layer of 308g biaxial on top and below plus 2 layers of unidirectional 220g below and one layer unidirectional 220g on top of it.
plywood freeride industries - go ply, ride wood!
hello,
on the first pair of skis we made (you'll find them on the thread "FAT from Grenoble"), the flex was perfect...but it's a mix of different things : we used carbon and aramid fibers, and you should pay attention to the wood too.
We gathered data from the skibuilders guy models and ended up doing something similar to the "Bangers&Mash" (damn nice ski !).
Finally the flex was really good (pretty stiff), but we find it being too soft in torsion. Therefore this year we will use carbon crosses between center and tip & tails to try to solve this.
on the first pair of skis we made (you'll find them on the thread "FAT from Grenoble"), the flex was perfect...but it's a mix of different things : we used carbon and aramid fibers, and you should pay attention to the wood too.
We gathered data from the skibuilders guy models and ended up doing something similar to the "Bangers&Mash" (damn nice ski !).
Finally the flex was really good (pretty stiff), but we find it being too soft in torsion. Therefore this year we will use carbon crosses between center and tip & tails to try to solve this.
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thetradwoodboat
- Posts: 22
- Joined: Mon Mar 12, 2007 3:42 am
- Location: ports., nh
- Contact:
my first pair made at the beginning of '06 was too soft under foot and too stiff in the ends. a layer of woven glass then a layer of triax under the binding, about 2 feet long made the flex curve pretty nice, but too stiff overall.
since then i've been incrementally taking thickness out of the shovel profile and adding more under foot and in the tail. the skis are better and better. more lively and still seem to give nice lift in deeper snow.
so much to learn !
since then i've been incrementally taking thickness out of the shovel profile and adding more under foot and in the tail. the skis are better and better. more lively and still seem to give nice lift in deeper snow.
so much to learn !
My first pair, the Bremallows, was really soft. But, my second pair was really stiff. Most of my skis however, have come out about right for their skiing application. Good luck I guess.
The real difficulty though is when you start changing around the sidecut and ski widths. I suppose you could do beam calculations to figure out what different thickness/width configurations would produce the same strength/stiffness. But, that said, trial and error can be a lot more fun. And, if a ski is too stiff or soft for you, it isn't hard to find a friend who would be more than willing to ski your rejects.
The real difficulty though is when you start changing around the sidecut and ski widths. I suppose you could do beam calculations to figure out what different thickness/width configurations would produce the same strength/stiffness. But, that said, trial and error can be a lot more fun. And, if a ski is too stiff or soft for you, it isn't hard to find a friend who would be more than willing to ski your rejects.