Quote:
Originally Posted by Tim Walsh
I thought that might be the case, but then what about the left side main rail when it passes over/under the center rail?
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When the switch (in the photo, to the left) is thrown, the axle rotates (blue arrows). This causes the arm (red arrows) to shift the side rails to the left. At the same time, another arm causes the center rails (purple arrows) to shift to the right. This other arm is visible in the photo, but I forgot to tag it.
Since railroad wheels (bogeys) have the guide flange to the inside of the track, moving the track to the left (up at the red/green arrow area) will allow a gap to open up through which the flange will pass.
Below the foreground, not pictured, will be a crossway in the tracks through which the right rail of the main and the left rail of the spur will both pass. There will be gaps in the crossway for the flanges to pass through.
Does that help?
