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Originally Posted by dradel

The portcullis managed to break the 3/16 polycarbonate rails we intended for it to slide on when our driver hit it at almost full speed. It went up, hit its stops hard and then Newton took over with one of those pesky laws. Snapped the poly right off.

We used what we called the plow on our robot to have the porticulus slide on. It was made out of 1"×1" with 1/8" wall square aluminum and that still bent and minimum speed. It wasn't major bending but that part of the arm bent roughly 1.5" back by the end of State.