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Considering more than length

post #1 of 3
Thread Starter 
I spent last evening tuning Dynastar Legend 8000s and when I finished I stood them next to my SX:11s and immediately noticed how much further forward the bindings are mounted on the Legends. So this morning I got out a tape measure...I found this interesting though I'm not sure I understand all the implications.

The Dynastars are 172cm and the Atomics are 170

The first thing I did was to mark and measure each ski's "contact patch" as best I could. That is the area between where the tails and tips turn upward.

SX:11 148cm
8000 142cm

Then I measured how much of the contact patch was fore and aft of the midboot mark.

SX:11 84cm (fore) 64cm (aft)
8000 76cm (fore) 66cm (aft)

The tips and tails are as follows:

SX:11 16cm (tip) 6cm (tail)
8000 20cm (tip) 10cm (tail)

So the total ski for and aft of the midboot point is as follows:

SX:11 100cm (fore) 70cm (aft)
8000 96cm (fore) 76cm (aft)

So the 8000's have me 10cm further forward of center on a shorter contact patch and 6cm further forward on a longer ski.

All these measurments are rounded to the nearest cm.

Now, I'm trying to relate this information to what is known about the differences between the skis in terms of width, sidecut, weight, swing weight, flex and torsional rigidity. I haven't drawn any conclusions yet other than to observe that it's not surprising to notice the SX:11s like a lot more forward pressure than the 8000s do and that the 8000s seem to require more attention to holding the tails from washing out when completing a turn. All things being equal (which they are NOT), one ski simply has a lot more ski fore of the boot and less aft of it. I'm trying to understand how the differences in the skis may either exagerate or minimize these differences in longitudinal dimensions.
post #2 of 3
Out of interest...

If you were to suspend the skis between two chairs, tip on one chair tail on another, and press down with /without a boot in the ski, under what part of the boot is the lowest position of each ski?

I'd think the low point of the sx will be more towards the tips of the skis than the legend....which is why you need to press forwards more to balance.
post #3 of 3
Thread Starter 
Quote:
Originally Posted by BigE
Out of interest...

If you were to suspend the skis between two chairs, tip on one chair tail on another, and press down with /without a boot in the ski, under what part of the boot is the lowest position of each ski?

I'd think the low point of the sx will be more towards the tips of the skis than the legend....which is why you need to press forwards more to balance.

Vey likely but that's just another way of saying "one ski simply has a lot more ski fore of the boot and less aft of it."
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