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Delta vx. Binding Position vs. ??

post #1 of 3
Thread Starter 
In assessing someones alignment how do you differentiate between delta, binding mount position, forward lean, etc. It seems to me that these are all somewhat interactive variables. As such, do you address one first and then another, or do you interactively work between these?

I would guess that even alignment specialist don't always consider or address all of the factors but I would guess that there are skiers out there looking to get aligned for optimal performance that would find the answer to the question informative.
post #2 of 3
This is a great question Si! and you are right. The fore/aft alignment has more variables than the lateral and is just as, if not more important, than lateral alignment. There are actually even more considerations in this plane. Ankle ROM, length of foot vs. tip fib length, boot flex, and ramp come to mind.

Without going into great detail, getting it close in the shop and then testing dynamically on hill will yield the best results IMO. This is a topic which I hope a small group of bootfitters, who plan to get together in Big Sky this Spring, will explore in more detail and hopefully agree on some specific protocols.

The Campbell balancer assessment does not take into consideration any Delta angle in it's evaluation. This is another area that needs more testing in my mind. The other pitfall I see here is that the Campbell balancer is not readily available any longer making it difficult to bring mainstream. Another interesting tool, the "Tek Scan" may have some viable use in fore/aft alignment too?

Though we alignment guys may not adjust all these areas with each skier, it is important to understand their affects and have the knowledge to use each facet to find the optimal position for each skier.
post #3 of 3
Although we've taken a bit of a vow to not air disagreements in public I am going to reply to some of Bud's statements here. Although I'll somewhat disagree the purpose of doing it here it to point out just how difficult and uncharted some of what we do is.

Certainly among the group here you will find different rules for alignment and different methods of setting it, but most of the time we'll get good results. I think the reason is that as Bud said and as you intimated everything is related and many times things are so far off that any changes in the right direction can have dramatic effects. What we don't know is the relation of all different angles and how to absolutely set them optimally for all people.

Bud said Tekscan has some interesting capabilities and as I use it in my store I'll agree, but admit I may use it seuperficially compared to what it may be able to provide. I'll agree with Bud on Campbell Balancer but with some caveats.

First the purpose of the balancer is not to assess ramp, so the fact that it doesn't is not a drawback. It is simply a tool with specific purposes. That said I have found that there is a relation between ramp and results from the balancer. Not everyone can get results from the balancer. It requires a certain understanding of motion in order to move properly on it to get reliable results. But many times when I can't get results it is due to excessive ramp that makes it difficult for skiers to pressure their boot front. Often when ramp is decreased balancer results improve.

Either way there is a lot to learn and hopefully we'll have more knowledge following our meeting this spring.

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EpicSki › The Barking Bear Forums › On the Snow (Skiing Forums) › Ask the Boot Guys › Delta vx. Binding Position vs. ??