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Unread 06-02-2012, 10:53
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Re: Forced needed to get on Bridge

Quote:
Originally Posted by jdunston94 View Post
instead of putting aton of uneeded weight on the underside of the bridge we just put surgical tubing


and it is right around 18lbs of force perpendicular to the bridge to push it down
This will not actually yield the competition bridge dynamics. How much it is off will be situation-dependent. In short though, you're now using spring force (F=-kx) rather than distributed bass to balance the moments. This means that, while you may pass the battery test, as your bridge moves, the moment caused by the spring force will not fully mimic what the simply heavier competition bridge would do. It probably won't affect your bridge lowering tests, but if you're practicing (much less autonomously programming) balancing on it, don't count on the results being the same unless you've tested it.
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