Sidecut, mounting points, and profile
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Sidecut, mounting points, and profile
I am in the beginning stages of designing a ski for myself
While looking at other skis I have I've noticed a few things.
Some skis (park skis mainly) are mounted directly in the center. this is also right at the apex of the sidecut.
Other skis are mounted somewhat behind the centerline of the ski. I'm not able to determine whether the sidecut apexes at this point, or at the very center of the ski. Do you think there'd be any advantage to adjusting the apex of the sidecut arc to correspond to the center of the mount point rather than the center of the ski?
I know there's a book on the physics of skis, but it looks like a pretty involved read... I've only taken first year physics... I've always figured hell was something that *might* happen at the end of one's life. Not a self inflicted learning experience selected in one's prime.
While looking at other skis I have I've noticed a few things.
Some skis (park skis mainly) are mounted directly in the center. this is also right at the apex of the sidecut.
Other skis are mounted somewhat behind the centerline of the ski. I'm not able to determine whether the sidecut apexes at this point, or at the very center of the ski. Do you think there'd be any advantage to adjusting the apex of the sidecut arc to correspond to the center of the mount point rather than the center of the ski?
I know there's a book on the physics of skis, but it looks like a pretty involved read... I've only taken first year physics... I've always figured hell was something that *might* happen at the end of one's life. Not a self inflicted learning experience selected in one's prime.
I think it depends on the type of riding you'll be doing. From what I've noticed, most skis have the sidecut centered a bit ahead of the center of the mounting point. I think this was used more when skiers performed fewer switch maneuvers. If you've ever arced a turn switch on a pair of skis mounted center you can notice not only the increase in stability from the larger tail, but also the maneuverbility due to the sidecut being more centered, so to speak. Just my 2 cents.
I have read a little bit about how to determine exactly where to mount the bindings, and need some help in making sure I have this correct before finalizing my design.
My understanding is that the ball of the foot should be over the midpoint of the chord, and then the middle of the boot is estimated.
How are others determining this?
My understanding is that the ball of the foot should be over the midpoint of the chord, and then the middle of the boot is estimated.
How are others determining this?
I use a simple calculation of area for determining the mounting point. 42% of the area should be behind the boot center for powder skiing. On my Voelkl Gotama this is a bit to much forward for powder but you can carve it well on piste. With my reverse sidecut homebuild i can lean as much forward as possible without making the tip dive (it just slows down). I put the widest point (reverse sidecut) of the ski to the boot center.
There was a posting in another area of the forum that suggested a ratio of 200/250 for the area behind/above the binding. So the percent for the tail would be 200/450 = 44%, which is pretty close to the 42%.
hose-man....i sent you a few pm's re surplus fire hose you still may have for sale...can you let me know please. Thanks.
hose-man....i sent you a few pm's re surplus fire hose you still may have for sale...can you let me know please. Thanks.
There was an article in a freeskiers magazine some time ago. They said that 42% is the maximum you should go backwards to keep the ski still manageable on the slopes. A more versatile setup is 43-44% percent. We tested the 42% percent on some skis (Rossi B3, Atomic Sugar Daddy, Karhu Jill, Voelkl Gotama) and found that this is a good compromise for freeriding.
The min. width seems to be always a little bit 1-3cm in front of the boot center. But i'm not shure about this...
The min. width seems to be always a little bit 1-3cm in front of the boot center. But i'm not shure about this...