319 hasn't made a chain-in-tube drivetrain yet, but what I find attractive about the design is it's simplicity and the volume savings. It may be a little less easy to work on, but due to the protected nature of the chain, the odds of you having to work on it are smaller.
Mounting gearboxes becomes much easier as well.
Quote:
Originally Posted by Cash4587
I could be wrong, but I am pretty certain chain definitely does stretch over time, more so than belts. Due to the fact roller chain has metal pins and bushings that all see general wear and tear, I think chain elongates the more use it sees.
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Under the forces it'll see in FRC, chain cannot stretch. It can wear, however.