Chain C-C Add Amount

[Nate_Laverdure]

@Nate_Laverdure

The thing we learned is that the extra amount of c-c you add depends on the type, brand, and manufacturer of the chain and sprockets you use.

If we need to do exact C-C design again in the future, we will measure the correct center distance needed for the specific parts chosen rather than use the adder number we previously advocated.

Here is a measuring procedure:

Chain Tensioning

This summer we are experimenting with non-adjustable wheel positions, and chains inside our side rails. The first rail we made had nominal C2C distances. While it is functional, the chains sag enough to touch the inside of the rail tube, making the drive assembly noisy when running. For the second tube, we took a WAG (embarrassing to admit, for engineers), and increased the C2C distance about .008". This resulted in saggy chains again. After that, we did what we should have done from the st…