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Confusion Over Curve Radius
Dale has a question for experienced model railroaders and asks:
“Curve Radius – 15″ 18″ 22″ Is this radius measured from the inside of the curve; the center line of the curve; or, the outside of the curve? Does someone know?”















It’s the centre-line.
Curve radius is measured from the Center of the curve. Jay Nadkarni
Dale,
The Radius is measured at the CENTER LINE of the curve, Just as it is when spacing multipule tracks for a multi track line or yard.