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Grand Scales General Code of Operating Rules First Edition January 1, 2007

Helper engines 4.25 Trains with multiple engines must work together. The lead engine will control the entire train brakes with the helper engines’ train brake control valves cut out. The lead engine must communicate the required whistle signals to the helper engines (starting and stopping). All helper engines must repeat the whistle signal starting from the front in succession before the train can be moved. Only after all engines have repeated the signal may the train’s brakes be released and the train moved. Example

Lead engine #1 judging speed and distance engine #1 spots for water and gives one long sound of the whistle applying the train brakes and engine brakes. The second engine #2 stops and gives one long sound of the whistle applying its brakes signaling to stop. The third engine #3 stops and gives one long sound of the whistle applying its brakes signaling to stop. When the lead engine #1 is ready to move forward it gives two long sounds of the whistle. Engine #2 must repeat two long sounds of the whistle and be ready to move forward. Engine #3 must repeat two long sounds of the whistle and be ready to move forward. Only then may engine #1, #2, and #3 release the brakes and move forward.

Engine #2 Judging speed and distance, engine #2 spots for water and stops giving one long sound of the whistle applying its brakes. Engine #1 must apply the train brakes, and engine brakes, and repeat one long whistle sound signaling to stop. Engine #3 must apply its brakes and signal the other engines it has stopped. When the #2 engine is ready to move forward, it gives two long sounds of the whistle. Engine #1 must repeat two long sounds of the whistle and be ready to move forward. Engine #3 must repeat two long sounds of the whistle and be ready to move forward. Only then may engine #1, #2, and #3 release brakes and move forward.

Engine #3 must judge the speed and distance to spot for water and stop giving one long sound of the whistle applying its brakes. Engine #1 must apply the train brakes, engine brakes and repeat one long sound of the whistle signaling to stop. Engine #2 must repeat one long whistle sound and apply its brakes. When engine #3 is ready to move forward it gives two long sounds of the whistle. Engine #1 must repeat two long sounds of the whistle and be ready to move forward. Engine #2 must repeat two long sounds of the whistle and be ready to move forward. Only then may engine #1, #2, and #3 release the brakes and move forward.

Engines that are spotting for water should carry the majority of the load.

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