SD5705 : Trencherfield Mill - the barring engine

taken 12 years ago, near to Ince-in-Makerfield, Wigan, Great Britain

Trencherfield Mill - the barring engine
Trencherfield Mill - the barring engine
Small steam engines could be turned manually with a long 'bar' to carry out adjustments or move the crank to the starting position. Large engines could have over 100 tons of moving parts and be connected to thousands of feet of shafting. Moving an engine like this required mechanical 'horsepower' not just a man's musclepower. Therefore they were fitted with a steam powered 'barring' engine. This one has a pair of inverted vertical cylinders and drives a gear train that engages with the ring gear inside the flywheel's rim. The gear is self disengaging if the main engine should start running with the barring engine engaged (like the 'Bendix' on an aotomotive starter). The rope race extends to the left and a few ropes are still in situ.
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SD5705, 233 images   (more nearby )
Photographer
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Date Taken
Sunday, 22 May, 2005   (more nearby)
Submitted
Tuesday, 13 July, 2010
Category
Steam engines   (more nearby)
Subject Location
OSGB36: geotagged! SD 5786 0513 [10m precision]
WGS84: 53:32.4667N 2:38.2413W
Camera Location
OSGB36: geotagged! SD 5786 0513
View Direction
West-southwest (about 247 degrees)
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