TDK6, I will admit that I did not have the audio on the first time I watched the video. Now that I have gone back & listened to the description, at no time does he say anything about up unweighting. In fact, he says the same thing that I said! One can either change edges on a flexion or extension, in this case he is flattening/un-edging the skis through an extension movement.
I understand exactly what I said, but I am having difficulty understanding what you are saying! All I am saying is that extension is not necessarily up unweighting... but whatever.
I don't believe you need to up unweight to make a turn, I think you need to release/change edges. Even though some pressure will be released, merely tipping the feet from one direction to the other can accomplish this. For the turn to be parallel the edges need to be changed simultaneously, that is all.
I keep coming back & editing:
In the gray box I have highlighted your use of "up-extension" do they use that term in the video, because I never said it? I agree that extension can be in different directions (to the side, down the hill, etc., or even "up"), but I think "up" would be away from the direction of the turn. I do not believe that is what is being demonstrated in the video.
I dont know why he did not use the word up-unweight. Maybe he did now want to assosiate himself with a polished mahogany table . But every skier should know that such an extention results in unweighting. Its the good old up-unweighing movement that has been used for ever and ever. Still valid IMO. You are right. An extention is not necessarily up-unweighting. Actually its the total opposite. But it results in unweighting once the up-move stops. I tried to explain that earlier. Look at my earlier postings. So all up-movements that are fast enough ends up unweighting you.
You dont need to be unweighted at turn initiation since you can just roll your skis onto their new edges and carve away but if you dont want to carve you need to establishe that skidding angle. And that you cannot do if you are not unweighted. You talk about a relese. That is correct but you are forgetting one thing. If you are skiing across the slope in a traverse and "relese" the edges. What happens?
If you are skiing straight across the slope your edge is already partly released; if it wasn't you would be turning up hill. Flatten your ski a little more and you will turn downhill as in a purely gravity and friction controlled pivot slip.