Download - Steam Engines - Parts
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Parts of a Steam Engine
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Tender
Container holding water for the boiler and coal for the fire box.
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Cab
Compartment for the driver and fireman to control the engine and
tend the firebox.
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Whistle
Steam powered whistle, located on top of the boiler and used as a
signalling and warning device.
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Reach rod
Rod linking the reversing actuator in the cab (often a 'johnson bar')
to the valve gear.
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Safety valve
Pressure relief valve to stop the boiler exceeding the operating
limit.
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Generator
Steam powered electrical generator to power pumps, head lights etc, on later locomotives.
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Sand box / Sand dome
Holds sand that can be deposited on the rails to improve traction,
especially in wet or icy conditions.
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Throttle Lever / Regulator
Controls the supply of steam to the cylinders.
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Steam dome
Collects the steam at the top of the boiler so that it can be fed to the
engine via the regulator/throttle valve.
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Air pump
Provides air pressure for operating the brakes.
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