I agree with Allen. The bumpers (or any attached bumper hardware) do not define the frame perimeter -- only what's on the robot defines the frame perimeter.
Quote:
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Originally Posted by Glossary of the FRC Manual
FRAME PERIMETER: the polygon defined by the outer-most set of exterior vertices on the ROBOT (without the BUMPERS attached) that are within the BUMPER ZONE. To determine the FRAME PERIMETER, wrap a piece of string around the ROBOT at the level of the BUMPER ZONE - the string describes this polygon.
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Since your wheels & axles define your perimeter, the plywood backing of the bumpers must butt up against them at every exterior vertex per R22.
Additionally, that is definitely a bit of stretch for the definition of "bumper mounting hardware" that I wouldn't stake my season on without a clearer definition from Q&A.
Fortunately, it looks like it's easy to accommodate hard mounts on the frame itself for bumpers & a frame perimeter everywhere except the front corners. Quite honestly, nothing defines what materials hard frame mount must be made out of, so it can technically be 1/32" sheet metal for the front corners.
The perimeter shape in a nice way of ensuring the 112" distance is met. Kudos to whomever thought of that idea on your team!
Tinkerer math = engineer - MikeE [more] 
31-01-2013, 09:47
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