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Unread 22-09-2003, 03:39
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ahecht ahecht is offline
'Luzer'
AKA: Zan
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Team Role: Alumni
 
Join Date: Dec 2001
Rookie Year: 2002
Location: Billerica, MA
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Quote:
Originally posted by Frank(Aflak)
What would work instead could be a wheel-switching mechanism (one wheel geared highs than the other, lower it using pneumatics).
Team 190 did this in 2001 and 2003 (although the two sets of wheels in 2k3 were at 90 degree angles to each other). The only problem with it is that is is much bulkier and heavier than a SotF transmission (which 190 had in 2000, IIRC). However, as we learned this past year, it can be really nice to have a backup driveline in case you pop a chain on your primary one.

Quote:
Originally posted by Jnadke
Actually the coefficient of friction of Cast Iron on Steel is 0.4. This is compared to the coeficient of friction of Steel on Steel which is 0.8.
Exactly. The only reason 190 didn't use steel on steel in 2002 was that it wasn't allowed. The CVT we started in 2003 (but never used) was designed to be steel on steel.
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Zan Hecht

Scorekeeper: '05 Championship DaVinci Field/'10 WPI Regional
Co-Founder: WPI-EBOT Educational Robotics Program
Alumnus: WPI/Mass Academy Team #190
Alumnus (and founder): Oakwood Robotics Team #992


"Life is an odd numbered problem the answer isn't in the back of the book." — Anonymous WPI Student

Last edited by ahecht : 22-09-2003 at 03:46.