Originally Posted by Ghost
I find that helpful axes of rotation to visualize include one aligned with the skier's spine, one with the ski's tip to tail direction and one perpendicular to top surface of the ski. I'm not sure which one your referring to, Could you elaborate?
1). The head and neck.
2). The spine from the hips to the shoulders
3 & 4) each leg (since they rotate independently.)
Turning each of the four has a greater or lesser effect on our skis (the farther away from the skis the less the effect. (rotating the head pretty much has zero effect on the skis...))
Edit: I don't think I answered your question did I?
EDIT2: So let me try this again. Both the Skis and the Body are both under the influence of 3 axis of rotation. For the skis, see the diagram below. The 3 axis of rotation also relate to the 3 fundamental skills. Rotation is a vertical axis through the center of the skis, Edging movements are a horizontal axis along the length of the skis, and Fore/Aft pressure control movements are a horizontal axis though the center of the ski base. (ignore the x,y and z, as I screwed those up...)
These 3 axis also exist through us, which are similar to the three axis that run through our skis. For simple assumption sake my center point will roughly be the hips. (Just thinking about this now, maybe the center point is the Center of Mass, but I want to reserve judgement on that statement until I think about it a bit more.) Anyway, there's a vertical axis that runs basically along our spine. There's an axis that basically shoots out of our belly button (and back). And there is an axis that through us horizontally though our hips. There are also several other joints that have axis of rotation as I mentioned above....
I hope that this is a bit more clear. I kinda got ahead of myself in my earlier reply.