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Unread 23-01-2011, 01:16
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Tristan Lall Tristan Lall is offline
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FRC #0188 (Woburn Robotics)
 
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Re: Are extensions with bumpers after the start of the game legal

Quote:
Originally Posted by EricH View Post
You need a 3/4" thick x 5" tall piece of plywood as bumper backing (<R07-F>).
Quoting for emphasis and great justice.

Quote:
Originally Posted by EricH View Post
I'd also be cautious about the plywood in the corners--because you're changing segments, you may run afoul of <R07-C>'s corner/segment joint-filling rules. In the past, it's been much clearer about whether or not hard parts in corners is prohibited (it was in the past, not sure about this year).
Some years it was allowed, some years it wasn't. It's been quite inconsistent historically.

This year, a fully overlapped 90° corner with 0.750 in plywood would have a dimension of approximately 1.060 in between the outermost extent of the "hard part" of the bumper (the plywood corner) and the corner of the frame perimeter. That violates <R07L>, which stipulates a maximum of 1 in.

What makes this really insidious is that not every corner that overlaps would run afoul of this rule. Other angles or incomplete overlap might still satisfy <R07L>.