Chain Length Calculation: Difference between revisions
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==Understanding the Problem== | |||
[[Image:Chain-layout-model.gif]] | [[Image:Chain-layout-model.gif]] | ||
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This makes for some interesting math. | This makes for some interesting math. | ||
==The most accurate math== | |||
[[Image:Chain-length-math.gif]] | [[Image:Chain-length-math.gif]] | ||
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==Some Approximations== | |||
I'm not a big fan of approximations. Spreadsheets exist for a reason. | I'm not a big fan of approximations. Spreadsheets exist for a reason. | ||
I will add some though, just for comparison. | I will add some though, just for comparison. | ||
==Some Data== | |||
[[Image:Chain-data.png]] | [[Image:Chain-data.png]] | ||
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<br> | <br> | ||
==Considerations for Motorcycles (Simple Swingarm)== | |||
[[Image:Center-to-center-table.png]] | [[Image:Center-to-center-table.png]] | ||
Latest revision as of 11:15, 29 January 2008
Understanding the Problem
A chainwheel is not round. Rather, it is a polygon with facet lenth of the chain pitch. The chain leaves the chainwheel, at maximum, tangent to the pitch diameter. The chain then travels in a (theoretically) straight line to the other chainwheel, meeting it in a similar fashion.
This makes for some interesting math.
The most accurate math
Here are some quick facts:
Some Approximations
I'm not a big fan of approximations. Spreadsheets exist for a reason.
I will add some though, just for comparison.
Some Data
Considerations for Motorcycles (Simple Swingarm)
For Single Speed Mountain Bikes
Theoretical center distance. Alfa = 1. For a good chain alfa can be in the range of 1.001 and 1.005.
