Originally Posted by 800lbgorilla
Someone may have mentioned ... that a slightly different bump technique is required when riding the newer skis with deep sidecut and fat tails ... . With pivot-at-the-top technique, and a bit of a skid around the bump to control speed, it seems like you might hook the wide tails of these boards.
I don't think a 'different technique' is actually required
. More like desired
. Modern skies are not only more shapely, they're generally softer, shorter and far more torsionally rigid than their older counterparts. They're great for bump skiing.
Skiing bumps with skidded, twisty turns where we mostly pivot on top of bumps using the base of the skis, then use skidding to control speed doesn't make any real use of new-ski attributes mentioned above.
I'd agree we need slightly
more distance between our boots to accommodate a wider tip & tail but not very much. I too like both my skis to be working the same approximate surface. Too far apart and one ski is going up while the other is going down...
If the tails of these shorter modern skis are poking/snagging the bump behind us we're probably pivoting too quickly from a bump-side or perhaps a trough location. If ski-tail-edges are 'edging-into' the bump we're on (as we leave it) our CM is likely further back than desired, or possibly, we haven't continued to turn the ski far enough before the ski-tip encounters real support.
When we leave one bump toward another the ski-tip climbs up the new bump before the tail leaves the old bump - partially suspending our foot between tip & tail. This allows the pair of bumps to gain massive leverage on the ends of our ski and prevents further pivoting of the ski. The ski's rotation 'stalls' until the tail is dislodged from the old bump. Whether we are pivoting the ski more from the front (desired), the toe of the foot (OK) or pushing out our heels (undesired) we still sense this hinderance in the tail.
A better way to use shaped skis in the bumps is as SoftSnowGuy describes above and as Pierre has described in the past - more (tip) scarving, less skidding. With the skis moving far more forward than sideways, we make maximum use of a modern ski's properties and minimize any tail-trapping situations.
mattchuck2 - 'Medium Radius Turns through the Bumps' is one of the L3 Cert Tasks here in the PNW. Pretty fun(ny) too. Cert Prep groups should make videos. We could raise a lot of divisional dollars on 'em.