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Unread 20-01-2012, 13:36
Cal578 Cal578 is offline
Passionate FIRST-er, CD donor
AKA: Gerry
FRC #0578 (Red Raider Robotics)
Team Role: Mentor
 
Join Date: Jan 2012
Rookie Year: 2008
Location: Rochester, NY
Posts: 262
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Re: Bumper question

The 1/13 update clarifies a few things about bumpers. The important thing is the new figure 4-3 for [R27]:


Note that the corner on the right side, a little lower than center, that was marked "NOT OK" is now not marked. Apparently, that marking was just a mistake in the original, so it's okay.

Quote:
Question - does the 8" measurement of the bumper segment mean the plywood backing has to be 8" or is it the overall length, including the overlap with the adjacent side, which would be pool noodle and fabric. If it is the overall length, you could have a chassis opening of about 19" on a conventional chassis?
My interpretation is that the minimum length IN CONTACT WITH THE FRAME is 8", so that doesn't count any plywood extending past the vertex and overlapping with another piece of bumper plywood. Figure 4-4 in [R28] shows that the overlapping plywood is ok, and [R33] with the 1/17 updates says that "each end of the Bumper must be rigidly attached to the Frame Perimeter", so the part extending past the bumper won't count towards the 8". Since this last part is my interpretation, I sure would like to see an update that has dimensions inside the figures showing where this 8" is measured.
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Cal
R3: Red Raider Robotics (FRC Team 578)
Fairport, NY, USA
www.FairportRobotics.org
2016 Finger Lakes Regional: Semifinalist on Alliance 7 (1128, 2010, 578)
2016 NYC Regional: Finalist on Alliance 3 (3419, 578, 3017), 4th seed team, Team Spirit Award
2015 Finger Lakes Regional: 8-3-0 in qualification, 7th seed, Quarterfinalist
2014 NY Tech Valley Regional: 8-4-0 in qualification, 13th seed, Semifinalist
2013 Finger Lakes Regional: 4-5-0 in qualification, 26th seed, Alliance 6, 1-2 in tournament
2012 Buckeye Regional: Gracious Professionalism Award, 7-3-0, 14th seed
2011 Finger Lakes Regional: Engineering Inspiration Award
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