pic: How?
 

Re: pic: How?
 

Well that's fun. I'm guessing something got jammed between the spokes while the motors were at full rev? That takes talent, my friends.

Re: pic: How?
 

how? observe the following formula:

rim = not moving + hub = moving = no more hub on wheel

Re: pic: How?
 

I'm calling shenanigans. :yikes:

Re: pic: How?
 

The spokes look too sharp for it to be a spinning motor. It looks like someone took a hammer to the hub of the wheel, perhaps to get a hub out that was stuck? That would be likely if someone threaded #10 bolts into the holes, which would make it hard to unbolt (heh, we have experience with this one:o) ... so plan B was a hammer.

Re: pic: How?
 

hmmm...that looks familiar...

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Oh my...

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I haven't done since 2005.
We had too much weight on the rear of the robot and if it slammed down hard after placing a tetra the skyway wheels could shatter near the hub.

It was the last year we used kit wheels or 6" wheels until this year...

Re: pic: How?
 

gnomes stole it

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By any chance did a robot slam into the side of your robot where this wheel was located, such as at practice while bumpers were missing?

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GAAA!! why won't they leave me alone?!:ahh:

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Because they need wheel hubs. They're building...

A 100 WHEEL DRIVE

Re: pic: How?
 

Hahaha, that's cool :D intresting breaks in the wheel. Was it spinning when it broke?

Re: pic: How?
 

We had the pictured failure happen to us at least three times during competition in 2007 with the kit wheels. If I recall correctly, we thought the problem was mostly getting pushed sideways by defending robots. We didn't have serious troubles until the off-season tournaments, when a combination of more aggressive defense and the accumulation of lots of matches took its toll. The A/M wheels were strengthened for 2008. We didn't have any failures in 2008, but the game didn't involve as much defense, either.

Re: pic: How?
 

469 and 330 reported the same, 469 on a crab and 330 on a 6WD drop center. The suspicion was that it was side loads. And yes, the wheels were strengthened after 2007.