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Originally Posted by mechanicalbrain
I'm curious about the actual benefit of dual wheels. Also what material are your rollers and how well do they work. If anyone has ideas for good materials for rollers that can be easily shopped i would really appreciate you sending me a message. I need something with a fair amount of traction on carpet but wont cause enough friction to cause trouble with rolling.
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931 used 60A polyurethane rollers to make larger diameter (9") omniwheels for our 2003 'bot. Traction was good. Dual wheels improve smoothness, limit slip, and also provide some redundancy in case a roller gets knocked out or chewed up. Single wheels would save about 0.7 lb (2.8 for the four-wheel drivetrain) but all things considered I think the benefits are worth the extra weight.
__________________
Richard Wallace
Mentor since 2011 for FRC 3620 Average Joes (St. Joseph, Michigan)
Mentor 2002-10 for FRC 931 Perpetual Chaos (St. Louis, Missouri)
since 2003
I believe in intuition and inspiration. Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world, stimulating progress, giving birth to evolution. It is, strictly speaking, a real factor in scientific research.
(Cosmic Religion : With Other Opinions and Aphorisms (1931) by Albert Einstein, p. 97)
There's no feeling quite like that one you get when you're behind the diamond plate controlling a metal beast that you've put your blood (literally), sweat (more literally), and tears (probably literally) into, and it working. Undescribable. - scali [more] 
04-08-2005, 20:53
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