Thread: Position idlers to get better chain wrap -- a question about good practices.
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Unread 06-12-2007, 13:21
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Re: Position idlers to get better chain wrap -- a question about good practices.
If you can mount the drive motor/trans assembly midway between the wheels AND have it mount such that it can be moved vertically slightly, you could use a double-row drive sprocket and two independent chains. Each chain run is shorter, which seems to reduce tensioning problems. To tension it, just loosen the drive assembly and shim it up slightly. Team 975 has done this a couple of years. Tensioning with #35 chain was rarely required, and slipping a thin washer or two between the drive mounting plate and the frame seemed to take up more slack than you'd imagine.

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Richard Linn

Proud father of Marine LCpl. Karl R. Linn
Co-founder Team 975
KIA, Iraq 1/26/2005