Norm Stenzel knows that the track on his Brandywine and Benedictine model railroad is exactly 324.5 feet. How does he have such a specific number? He made an odometer car. Norm took a digital counter from RadioShack and mounted it in a 50 foot boxcar – something with double doors so the screen can be seen would also work.
Wiring it to one of the trucks was easy, the hard part was finding a wheel set that rotated a full 10th of an inch. This he just happened to be able to find in his junk pile. One revolution of the wheel needed to read one 10th of an inch. The odometer car is able to read off the exact number of inches when it is ran along the track. Simply by running the car around his railroad from point A and back to point A, Norm discovered that his track was exactly 324.5 feet. What a clever and easy way to determine track footage.