Thread: Bridge Mass Properties
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Unread 23-06-2002, 23:02
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#0047 (ChiefDelphi)
  
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Bridge Numbers PS
Posted by Dodd Stacy at 1/16/2001 12:16 AM EST


Engineer on team #95, Lebanon Robotics Team, from Lebanon High School and CRREL/CREARE.


In Reply to: Bridge Mass Properties
Posted by Dodd Stacy on 1/16/2001 12:02 AM EST:



I forgot to include, for the bridge tenders out there, we neasure a vertical force at the end lip of 9 lbf, +/- 1, to raise or lower the end of the bridge from the balanced position. From the totally tilted position, the force required to move the bridge is very small, 1 lbf or so, less than the accuracy of the crude spring scale we were using.

I personally hope that FIRST will apply some grease to the steel angles making up the "pivot" of the bridge. It is so crude and involves such significant sliding under heavy loads that I think it will start galling and sticking without lube and become very erratic in its friction and breakaway characteristics.

Dodd


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