Originally Posted by khuon
It also looks like his plotting code may be slightly flawed because it generates some incorrect positioning. Here's the linear plot. Notice some of the cog positioning relationships have changed around the 60 to 65 gear-inch range.
Code:
Linear Graph
2 3 4 5 6 7 8 9 10 11 12 13
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I 1 2 3 4 5 6 7 8 9
M 1 2 3 4 5 6 7 8 9
O 1 2 3 4 5 6 7 8 9
I agree. I checked a few of his numbers and they were correct, but the plot is suspect. For example M-4 is 58.3 and O-2 is 59.6, putting the latter to the right of the former, on either plot, but those two points are in the reversed (wrong) order on the log plot. I'll write a little program to do the same calculations and plot. Stay tuned.