(This was first posted on the Instruction Forum.)
I've been thinking quite a bit about stated Turn Radii as it's on most skis now. I have both 16m and 13m skis. As I've found this is NOT the turning radius of the skis. Think about it. that's 40-50 feet, (and if that's the radius, then the diameter of the circle is 80-100 feet!) Slalom skis have a turn radius of much less than that.
What this metric is, as the link below explains, is the radius of a circle that the sidecut would be a part of with the ski layed flat. The turn radius of a ski is a completely different thing, created by 3 elements; the sidecut, the amount the ski is pressured and thus decambered, and the edge angle. This makes perfect sense as you can tighten up a ski's turning radius by pressing down hard on it and bending it into a tighter arc. There is no "natural" turn radius of a ski, only a range.
So all this hooey about turning radius is flawed, as it is only one component of the turn size that a ski makes. My Atomic SX:11's are stiffer, and don't tighten up their turns as much as my Fischer RX8's thus making the difference between them much more than the numbers reflect.
See this great piece on the physics of it. http://www.math.utah.edu/~eyre/rsbfaq/physics.html
I've been thinking quite a bit about stated Turn Radii as it's on most skis now. I have both 16m and 13m skis. As I've found this is NOT the turning radius of the skis. Think about it. that's 40-50 feet, (and if that's the radius, then the diameter of the circle is 80-100 feet!) Slalom skis have a turn radius of much less than that.
What this metric is, as the link below explains, is the radius of a circle that the sidecut would be a part of with the ski layed flat. The turn radius of a ski is a completely different thing, created by 3 elements; the sidecut, the amount the ski is pressured and thus decambered, and the edge angle. This makes perfect sense as you can tighten up a ski's turning radius by pressing down hard on it and bending it into a tighter arc. There is no "natural" turn radius of a ski, only a range.
So all this hooey about turning radius is flawed, as it is only one component of the turn size that a ski makes. My Atomic SX:11's are stiffer, and don't tighten up their turns as much as my Fischer RX8's thus making the difference between them much more than the numbers reflect.
See this great piece on the physics of it. http://www.math.utah.edu/~eyre/rsbfaq/physics.html