This program calculates the lengths of the ties needed
and the frog angle and number needed to complete the switch.
Explanation of Input Boxes
Note: All dimensional units must be the same. Inches, meters, etc.
Radius of Diverging Branch
There are two boxes here. One for the radius and one for an optional
multiplier. The multiplier can be used to convert feet to inches,
meters to centimeters, metric to english, or whatever you like.
Normal Tie Length
The length of a normal track tie. Switch ties will progressively
The measurement from tie to tie, not the gap between them. It is the
center to center distance. The width of ties is not needed.
Snap to Nearest Unit
This allows you to select how much precision you need. The tie length
will be rounded to the nearest unit you select here.
This is only needed if you are using the optional frog angle and number
calculator. Enter the actual gauge-face dimension. The frog angle will
be calculated in degrees. The frog number is 1/2 the cotangent of 1/2
the frog angle. Both frog angle and number are rounded to .25.