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In doing my own homework on grades, I've come accross a lot of posts from people trying to figure out how to calculate them. I've made so many calculations myself I finally just created an Excel spreedsheet to do the math for me.

20 inches at 1%, then 24 inches at 2% for an easement. Then 110 inches at 3% then back off to 2% for another 18 inches and finally 1% for the last 40 inches. And how high will that get me? Hang on while I figure this out. Hmmm maybe a spread sheet might be useful after all. Ah yes, there we go: Just shy of 5 inches.

But now suppose I have 130 inches of distance and I need to climb 5 1/4 inches to clear my highest husky? Hmmm, at that rate I need a 3.9% average grade. Might need to take that one back to the drawing board.

Anyone can figure a 2% grade at a quarter inch rise per ft. It's the harder problems I made this for. Use it if you need it. Leave it if you don't.

Nice work with the spread sheet.
I was wondering if you found out how to calculate grade on when a curve is present.
My dilemma is this:
I have (essentially) 22" curves making a bit more than a half circle. The TOTAL linear length as the crow flies would be 44 inches. The rise is ab out 3.5 inches.
This would indicate an aprox grade of 8 percent.
However, if the linear meausrement as the train rolls it is closer to aprox 80 inches, which would be about 4.4 percent.

I have (essentially) 22" curves making a bit more than a half circle. The TOTAL linear length as the crow flies would be 44 inches. The rise is ab out 3.5 inches.
This would indicate an aprox grade of 8 percent.
However, if the linear meausrement as the train rolls it is closer to aprox 80 inches, which would be about 4.4 percent.

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