I have sixteen foot radius curves. I used #8 frog switches. They work
out to be about the same curve.
I believe that on prototype railroads the max speed through the diverting route is twice the frog # in MPH. So a #12 switch will give you about 24 MPH. That is why they are going to #20 and larger movable frog switches.
Robb in Michigan
Dave Cole wrote:
After drawing an arc for a wide curve (almost 12 feet) on the benchwork and using the bent-stick method of obtaining an easement (transition), I find that the curve appears to be 5 degrees off the tangent.
