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Nigel: Thank you for the information. However, the turn out piece on a #6 'snap' turnout goes off at a curve. The curve is such that the length of a chord across the arc is ~ 7.5" and the height from chord to arc at center is ~ 0.3125. At one time I had the formula to calculate the radius from the above. If any one has it I would appreciate it. Also you mentioned Atlas to down load from. Is this their "free ware" 5.0? Ken
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