Building a small Mom and Pop coal distributor and need a ramp up to 9 scale feet. So in doing the calculations for the grade up to the 9 foot deck I came across a % grade calculator.
Rise over Run to Percent Calculator - Inch Calculator
Any way on with my question is 5% too much for a coal dump?
To obtain a 3% grade i will need 300 scale feet in HO. 200 ft is 4.5%.