Divalent wrote: kirkb wrote: ... I like Jan's new SafetyMax Box Collar idea ...
... there are still two limitation that make it just an incremental improvement: 1) most of the box surface is still exposed to a falling body part, and 2) there is still a elevation difference right next to the hard (although now minimally padded) corners along sides and (in particular) across the top of the back of the box. Particularly the back of the box, where the pad is merely flush, not overhanging. There is your back breaker point.
Agreed. What I like is its simplicity ... no moving parts ... no human intervention needed to toss a bean bag over the box ... and it covers MOST of the HARD CORNERS of the box.
Divalent wrote: ... A bean bag will fill the depression, and so (if in place) preventing backs and heads from contacting them. And if they land on their feet, its a thick soft yielding substrate, not a slick hard angular surface that twists and breaks ankles.
I also agree with this ... except that you ASSUME that the bean bag "will fill the depression". Remember that the pole will be in the way, preventing the bean bag from filling the ENTIRE box ... or the ENTIRE depression (including the area between the box and the pit.
If you throw it in from the takeoff point (on the runway), then the hole remaining is going to be at the back of the box ... right where the vaulter is most vulnerable (same as with the SafetyMax).
If you throw it in from the side ... with the spotter standing next to one of the standards, at right angles to the box ... then the bag will still be stopped by the pole ... but this time the "hole" will be to the side of the box. Ideally, if the spotter stands to the right of the right front bun for a right-handed vaulter ... or to the left for a lefty ... then the pole will already be more to the far side of the box, so more of the box will be filled by the bag. However, there will still be a corner of the box (and a corner of the flat area next to the box) left unprotected.
Divalent wrote: Whether a spotter could get it down in time is a valid question.
If the spotter must move onto the runway, then throw the loose bag into the box, then there MIGHT be enough time, but the timing would be challenging ... to not step onto the runway before the vaulter takes off ... and to not startle the vaulter ... and to not stand too close to the runway before stepping onto it (which might distract the vaulter from his vault).
HOWEVER, if the spotter is standing next to one of the front buns, he doesn't have to move at all. He can just throw the bag in "at the right time" ... without distracting or startling the vaulter.
Divalent wrote: If they changed the rules so that its not a foul if a released pole knocks the bar off, then it could be done every time without a concern that the bag would cause the pole to displace the bar.
Throwing the bag in from the side should NOT knock off the crossbar (as much), since it would be pushed to the other side. I don't think you should toss the bag in on EVERY jump ... only if the vaulter appears to be in trouble. In this case ... if it's a choice between saving an injury or saving a clearance ... the better decision is obvious.
Divalent wrote: ... another question is whether the impact of the bag on the base of the pole would be noticable enough to a vaulter to upset their technique? It would probably be hitting the base of the pole at about the moment vaulters body was half way over the bar. Not being a vaulter myself, I don't know what a slight jarring or pole movement would mean in terms of what happens from that point on.
If the pole is pushed into the crossbar, then this is a definite problem, as it would interfere with the vaulter going over the bar. There would be lots of disputes as to whether the vaulter knocked the bar off, or the bag knocked into the pole, which knocked the bar off.
If the pole is pushed to the side of the crossbar, then this shouldn't be as much of a problem ... altho the pole might still knock off the crossbar (near the standard). But by that time, it should be obvious to an official as to what knocked the crossbar off.
Divalent, thanks for your persistence in looking for a solution to this safety issue.
I have something in mind ... based on the spotter standing to the side of the box ... which I'll post later.
Kirk