Firstly, I am very sorry to hear that TooSteep's child was hurt so very badly. I wish him a most speedy full recovery and return. Good luck.
Now on with it...
|Originally posted by Lew Black:
Binding manufacturers have been working on upward release at the toe for decades. The problem is retention and possibly elasticity. Hard skiing will put upward force on the toe that the knee can handle in some positions, but not in others.
But won't bindings which release due to a purely vertical force cause your skis to fly off when landing a jump on the tails of your skis....on the race course?... in the bumps?....in bumps in the trees?.....
I can't imagine a decent time that a purely vertical force should cause release.
I also don't understand how a spiral fracture should arise from a force that would pull the shovel of the ski down/tail up. Such a force would be push down on the toe, so the boot cuff would be forced into the calf, giving a bad bruise at most.
I don't think a vertical force is the culprit. Here's a demo of making a spiral fracture:http://www.fas.harvard.edu/~scdiroff...lFracture.html
As stated earlier, the lateral movement of the bindings seemed to work. So why did it fail?
Assuming it's set properly and is functional, a compressive force could do the trick. Perhaps the break actually occurred when he hit into the pile of slush, prior to actually falling? The binding might not have released because the boot did not slip on the anti-friction plate -- it stuck, with the help of the compressive force and the lateral force was not sufficient to move the toe piece.
Unfortunately, all a lawyer has to say was that the boot or binding surface was dirty or damaged and the lawsuit is over...Manufacturer is innocent due to reasonable doubt.
Which is another reason why one should never carry skis in a roof-rack with bindings exposed....or even walk with boots across the parking lot, potentially damaging the soles or colecting grit which could make them grip and not slip...
Sorry, but I can't see how the binding mfg is at fault through failure to provide upwards release.