Engine 107's Parts/Air Compressor

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This is the steam powered Air Compressor. Most people do not get to see
the Air Compressor because it is on the opposite side of the train when it is
in the station. If you listen closely when the train is in the station will hear a
"Chuffing" sound every few seconds.This is the sound of the Air Compressor
compressing air for the Air Brakes. The Fireman controls the Air Compressor
and maintains between 100 and 110 pounds of air pressure in the reserve
air tanks located under both sides of the Cab.