Just looking fo people's thoughts on how they design the transition from the cambered section to the up curve in the tip.
Two ways I figure to do it:
1. The camber section is simply an arc and the tip arc meets it tangentially (so the tip actually goes down a bit further before it starts going back up - if that makes sense).
2. The camber section is more like a sine wave so it's ends go back to being parallel to the ground at the contact point. The tip arc stil meets it tangentially, but immediately begins to rise from the transition point.
Some exagerated drawing examples
1.
2.
Any opinions and thoughts on how (or even if) this affects the ride. Thanks
I've also struggled with this "theory" and didn't really come to any conclusion. But I decided that the transition point should be the lowest point on a (my)cambered ski. And it should strive to touch the snow "first".
That would be your number 2.
I use Sno-Cadx so it does it for me. I still use the traditional design, the camber ends at the transition point which is the point where the tip begins and is the same point that touches the ground, which is the same point where the running length starts. It would be your diagram 2.
FWIW, I've been doing something more like the second method. I run the camber arc to the ends of the running length and start the tip arc at the end of the camber arc with a horizontal tangent. I then draw a spline starting 2 cm before the end of the camber arc, going through the end of the camber/start of the tip point and ending 2 cm into the tip arc to smooth it all out.
TS, using your method, do you compensate for the increase in camber height and/or running length? Or, is it not significant enough to worry about?
twizzstyle wrote:I do your method one. My camber section is a circular arc that meets tangentially with the tip, also a circular arc.
+1 for diagram #1.
When you de-camber the ski (by standing on it) the transition point naturally becomes the contact point and the tip rise also increases by several millimeters.
I've always designed skis using tangent arcs but my latest creation will have elliptical rocker profiles and a low cambered arc in the middle.
I have been experimenting with how long to make the effective edge relative to the running length. My next pair will have its turning edge running well past both contact points up into the rockers.
I can't imagine creating patterns without a real CAD program.
On my Piggy Sticks, there was a section of zero camber in the center, then a large radius arc for the rocker, which transitioned to a tighter radius for the tip. Still all circular arcs though.
