NZFMM 1993 Auckland Convention page 9 of 17

Railway Station & Stock by Don Blakeborough

Don built this model so the train would run out of the station for a short distance and stop.  The train would stay stationary until the motor on the timer reversed the movement.  This would set the engine going and the train would reverse back to the station.  The third rail at each end, was electrically broken, to stop current to the engine.

The current was controlled by a timer and ran through relays which also electrically connected the break under the engine. Don had to experiment with the timing.   If set too fast the train might not reach the station when suddenly the direction would be reversed.  If set too slow the train would stop when it ran over the break, but would have to sit a long time before movement would begin again.

The sequence to control the direction of the engine is shown in the table below.