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ok here is what we have - we have 2 drill motors moving a 4 wheel system. we doubled the 8'' wheels in the front so that the front of the robot has 2 wheels on each side and single 8'' wheels on the back. we use our drills in trans 1 and have a 1:4 ratio , being 18 tooth from the drill to a 48 tooth on the wheels. We never have a problem turning on any surface and can pull over 30 lbs. maybe this can help some people out there.
Team 28 -Mission Imposible- Drive system operator
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