Originally Posted by TheRusty
I can in my socks. YMMV (Your Movement May Vary)
When I up-unweight my turn initiation in the traditional way by up-extending, like in the Wedge to Parallel demo, I don't only turn my feet to pivot. Instead I just slightly extend my hips uphill to create a momentum going slightly to the side of where I'm heading and drag the skis off their edges. This is partly what is causing my skis to pivot in reference to the snow surface. Not purely a femur rotation action. Its more likely a combination of both. Point being that I don't have to think about how to pivot my skis in terms of having them perfectly flat or surface being smooth enough as in ideal conditions. I can do it in any kind of condition including powder or crud. Just add needed amount of momentum.
Like Jamt commented here below, by using the friction in both directions the feet can be pivoted when weighted but not necessarily in a skiing situation. If I have socks on and the surface being slippery I can pivot my feet up to 45 degrees in a very slow and easy manner by gently up-extending and turning my feet as the pressure decreases. I don't have to go up in the air. Just feel a little lighter under my feet. But as you say, MMMV.
Originally Posted by Jamt
About the floor thing first. Yes you can do that, but that is primarily because you can push one foot forward and the other one back and have friction in those directions. That does not work on skis.
With skis. Say that you are side slipping on the downhill ski and the uphill is lifted like in your demo above. If you now tip that uphill ski while the tip is still pressured you will get the moment you need to turn the skis. With short radius carving skis this works even if you are going straight ahead, but it is off course easier if you help that initiation with some rotary, like e.g. anticipation, but you don't need a lot.
Yes, any kind of movement creates a momentum. As it starts and as it stops. Tipping that inside leg probably also does so. However, to my experience the main part of the turning force still comes from the engaged LTE of the tip of the ski. That's why the tip is always on the snow in the Schrittbogen. If you lift the entire ski up in the air there will be no turning. If you tip the inside foot more than your outside foot, pointing the knee into the turn for an o-frame, then you get even more friction from that engaged tip of the ski because its edge angle is higher. As a result you turn much tighter. For the turns I did in the demo this was not needed. If I had done so I had probably made twice as many turns depending on the tipping angle offcourse. One important thing is also to not only lift the tail of the ski up in the air, you also need to press your lifted inside ski's ski boot towards your engaged outside ski's ski boot. If you don't do this then your inside ski will track to the inside while your outside ski continues forward.