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Unread 14-02-2008, 08:11
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Brandon Holley Brandon Holley is offline
Chase perfection. Catch excellence.
AKA: Let's bring CD back to the way it used to be
FRC #0125 (NU-TRONs, Team #11 Alumni (GO MORT))
Team Role: Engineer
 
Join Date: Jan 2004
Rookie Year: 2001
Location: Boston, MA
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Re: pic: Team 125 sideplate close-up

Quote:
Originally Posted by s_forbes View Post
Looks good! Can't wait to see it up close in AZ. How much does the whole thing weigh? (and what kind of wheels are those?)
We started with a ~4 inch diameter piece of delrin. Brought it on the lathe and faced, put a 1/8" deep 3/4" wide (overall width is 1") groove into and counterbored a place for the hub to sit.

Then we made aluminum hubs that slide into the center of the wheel, and sit flush with the face because of the counterbore. Put a bolt hole pattern in there and hex broached the hubs.

Then we made a mold out of a white plastic, i believe UHMW. We made teh ID of the mold to be 4.25" (so enough for 1/8" of tread over the edge). Using a 2 part urethane as well as a very accurate scale we whipped up batches of wheel tread, and SLOWLY and CAREFULLY poured the urethane into the mold with the wheel in there already. After letting it sit for an hour or 2 you popped a wheel out and called it a day.
__________________
MORT (Team 11) '01-'05 :
-2005 New Jersey Regional Chairman's Award Winners
-2013 MORT Hall of Fame Inductee

NUTRONs (Team 125) '05-???
2007 Boston Regional Winners
2008 & 2009 Boston Regional Driving Tomorrow's Technology Award
2010 Boston Regional Creativity Award
2011 Bayou Regional Finalists, Innovation in Control Award, Boston Regional Finalists, Industrial Design Award
2012 New York City Regional Winners, Boston Regional Finalists, IRI Mentor of the Year
2013 Orlando Regional Finalists, Industrial Design Award, Boston Regional Winners, Pine Tree Regional Finalists
2014 Rhode Island District Winners, Excellence in Engineering Award, Northeastern University District Winners, Industrial Design Award, Pine Tree District Chairman's Award, Pine Tree District Winners
2015 South Florida Regional Chairman's Award, NU District Winners, NEDCMP Industrial Design Award, Hopper Division Finalists, Hopper/Newton Gracious Professionalism Award
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