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Unread 17-02-2013, 23:02
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Gregor Gregor is offline
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AKA: Gregor Browning
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Re: Pre-Stop Build Scrimmages - What Have We Learned So Far?

Quote:
Originally Posted by DELurker View Post
Can you give a little more detail on that? It sounds like a good learning moment ... and probably a really entertaining video or photo set...
First of all, excuse my typo of axle, which I can't edit now.

We are running a 6-wheel drive with a 1/8 drop on the centre wheel, with AM performance wheels geared quite aggressively for 15 and 7 ft/second (calculated including efficiency loss). Performance wheels are threaded for 10-32. Each wheel had 3 grade 8 10-32 bolts in them.

About 10 minutes into driving yesterday, we noticed VERY limp chain. Upon closer examination, we found that the entire sprocket assembly had sheared off of the middle wheel. All 3 bolts had sheared. We promptly replaced the wheel with the bolts ends lodged in with our spare, pulled all the wheels off, and added 3 more bolts to each wheel.

Today I drove just as aggressivly, and we haven't had any issues (at least not with the drivetrain ). I suspect they sheared when I was braking while downshifting, but I'm not sure.
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What are nationals? Sounds like a fun American party, can we Canadians come?
“For me, insanity is super sanity. The normal is psychotic. Normal means lack of imagination, lack of creativity.” -Jean Dubuffet
"Insanity is doing the same thing over and over again and expecting different results." -Albert Einstein
FLL 2011-2015 Glen Ames Robotics-Student, Mentor
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FRC 2014-2015 Team 1310-Mechanical, Electrical, Drive Captain
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