Originally Posted by Lars
Ya for the most part when fall line powder skiing but there are still times when I'm going really fast while skiing big powder lines that still has me weighting the downhill ski more. Actually needing to do so to crank out turns. Not to the degree as one would on the groomed but still to maintain balance throughout the turn and into transition of the next.
Hence the need for big fat skis so that you can ski across the top of powder the same way everyone does on groomers, with essentially the same technique. If you're making a high speed turn that way, on powder...then you will have short leg, long leg going on. The fat skis enable you to do that. Essentially carving a turn.
However, remember the physics. On harder surfaces you want to maximize the amount of edge grip you have. This boils down to getting maximum force per square nano-meter that your ski is touching the snow. There are a variety of reasons why standing on your outside ski will help make better carved turns, but one of the reasons is that it cuts in half the number of square nano-meters of metal that are touching the hard surface carrying the centripetal force and thus doubling the amount of force per square nano-meter that is pushing down on the snow and creating grip.
On powder its different. Now you want the opposite effect. You want the SMALLEST amount of force per square nano-meter of the bases in order to float and make your turns. Fatter skis spread the forces out to more square nano-meters, which reduces that force and gives the skis more turn holding power. Likewise, standing on both skis will also increase this effect even more.
Fatter skis do enable people to ski on powder without having to worry about it as much...including...they can stand more on the outside ski than we used to...and it will work. However, generally speaking....for most people on their all-mountain skis...that is not the best way to approach powder and deeper crud. A more even stance will make the skis perform to their optimal level.
In addition to all of that, going for more of a 50/50 stance on powder will able cause the two skis to bend more equally and follow more or less the same paths through the snow and when you are in crud you want them close together and weighted about the same so that they hit the same clumps of snow and are deflected in more or less the same directions at the same time.