... dimension is, as shown, 594 ft, or 9 chains The question is, would that dimension shown be for the centre line of the turnout track, or would it be for the curve of the crossing rail only as shown? I know in most cases, the turnout radius, when related to the turnout as a whole, is referred to as the centre line radius, but this one has me guessing (which is something I don't want to do when inputting data). All the best, Brian Nicholls. 1853_151110_270000000.png posted: 15 Sep 2011 17:26 from: Martin Wynne Hi Brian, It's the radius in the rail, which Templot matches exactly: gauge> other gauges...> set exact scale...> 4mm/ft geometry> straight template> switch settings...> 12ft straight heel switch template> V-crossing settings... generic crossing, 1:8 do> convert RAM to CLM The result shows the turnout radius is 2376.32mm. Dividing by 4mm/ft= 594.08 ft. ...