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[quote user="spikejones52002"]Thank You Elisabeth Reymond.You are the first person to give me anything close to an intelligent explanation for a turnout number.Everyone else I questioned, would look at me like I should know exactly what is Small, Medium, and Large.Next I need to find out now they measure a curve by degree.[/quote] Hello again,Here's what our techie has in his library: Refers to curvature degrees used by the railroads They use a 100ft "cord" as the standard, lay that cord inside the radius of a curve. Run two tangents from where the end points of the cord are on the radius to the center point of the radius. The included angle between the tangents is the degree of curvature for that radius. Hope that helps ER
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