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Originally Posted by philso
In your latest renderings, it looks like the pulleys on the two middle wheels on each side will have two belts on them. Will there be any problems with the edges of the two belts rubbing against each other and causing wear of some sort?
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Provided proper tension or exact spacing is used, nope, teams have done this for years without issue. Remember, the belts are not in motion relative to each other when they're on the pulley.
Quote:
Originally Posted by Oblarg
Re: 9mm versus 15mm belts, it's worth noting when calculating the loading that in a 6-wheel drive train, the center wheels are taking far more load than the front and back ones. I'm much more comfortable running 9mm from a center wheel to the outer wheels in a 6WD than I would be going between center wheels on an 8WD.
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Many teams with similar setups are doing the exact same thing, actually. I wouldn't use six wheel drop alone as a reason to go to 9mm. 42T pulleys are more than big enough.
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4464's current preseason design uses 9mm belts, simply because it's extremely convenient to be able to only have one pulley on the center wheel. We're also using 42-tooth pulleys.
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IMO this is a really bad reason to pick a profile - you can just buy two 7mm slices with your pulleys to make them 32mm wide. That said, 9mm belts on 42T pulleys doesn't sound too bad.