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Starter motor | by Elsie esq.
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Starter motor

Between the spokes of this enormous mill engine is a small steam engine (the flywheel of which can be seen near the upper spoke of the large flywheel). The lever engages the large pinion with a toothed ring inside the flywheel . This enable the engine to be turned to a more advantageous position for starting. This is known as "barring" as iron bars were often used to lever engines into position for starting. The small engine is known as a barring engine and they may be seen on many large stationary steam engines.

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Taken on September 8, 2006