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Re: pic: 604's Arm
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Looking at your arm; Assuming 1x1x1/8 AL, and that those patterns are 1/2" radius x 2" long, inventor says that each cutout weighs .01 lbs. So, the strength loss versus weight saved seems not worth it in my opinion. |
Re: pic: 604's Arm
When we rebuild the arm, I don't think we are hollowing it out again. The defense robots at SVR were really good.
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Re: pic: 604's Arm
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Re: pic: 604's Arm
yea i saw the arm after the quarter finals and it looked pretty bad. team 190 played the strongest defense against us i have ever seen so it left you guys to score everything. you guys did great and put up one heck of a fight. it was great playing with you guys. and 624 your elevator ramps were awesome. very clever. 604, hopefully you guys can get that stuff fixed by nationals. but i think SVR will be some of the toughest defense we will see this year. thanks for the great alliace 624, and 604, you guys were great.
-Chris Driver, 668 |
Re: pic: 604's Arm
SVR was brutal for us, once everyone saw us in action in the first match of the regional they always sent thier defense at us. We got tipped over 2 times and almost 2 more times. I hated that match when 253 tipped us over. My dad got great video and it's painfull to watch them tip us.
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Re: pic: 604's Arm
Quick Fix:
Buy a piece of channel with a 1" slot and 1/8" wall (they sell it at Allen Steel and other suppliers in the Bay Area). Unbend your arm and press-fit the channel onto it. You won't even need any bolts. It will be so tight it won't ever come off. That should get you into the first practice matches:D |
Re: pic: 604's Arm
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Re: pic: 604's Arm
Yet again, you guys were a great alliance, both 604 and 668. It is too bad about your arm. At least you only need to replace the tubing. And now you can take off the steel and add a beefier arm. Good luck.
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Re: pic: 604's Arm
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The hole is a "stress concentrator" - the 'lines' of stress (or force) cannot 'flow' through the hole, they must go through a solid, so all the stresses focused at the end of the hole, and that being a weaker point, it failed. As stated, it can be calculated with some reasonable assumptions. This is called "engineering" Of course, even with double the arm, there can always be a hit that'll bend it. I, too, hope that your repair efforst go smoothly and you whomp them all in competition... Don |
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