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Originally Posted by iCurtis
My interpretation has always been that an "exterior corner" is one with both both edges (aka sides of the corner) on the BUMPER PERIMETER. This interpretation would be consistent with the images and text in Update #2. I'm working on getting our password to post in the Q&A.
Does this interpretation seem reasonable to anyone else?
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While your interpretation sounds entirely reasonable, it can't be. That's not how BUMPER PERIMETER is defined:
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BUMPER PERIMETER – the polygon defined by the outer-most set of exterior vertices on the ROBOT (without the BUMPERS or Trailer Hitch attached) that are within the BUMPER ZONE. To determine the BUMPER PERIMETER, wrap a piece of string around the ROBOT at the level of the BUMPER ZONE - the string describes this polygon. The BUMPER PERIMETER may extend up to, but cannot exceed, the maximum ROBOT volume constraints defined in Rule <R11>.
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Carmen's front corners with the acute frame angles are outermost vertices, and so by definition are on the BUMPER PERIMETER.
An entirely reasonable interpretation, in my estimation, would be to allow 842 to mount non-standard bumpers on the angled pieces such that with the standard BUMPERS on the side the corners are fully protected. The angled pieces would have to count in the robot size and weight. Whether that reasonable (IMO) interpretation will pass, well I guess it's up to them to gamble or not.
And the GDC is fond of saying, "We do not comment on particular robot designs. Here's the rule."