File:Trencherfield Mill - the barring engine - geograph.org.uk - 1960306.jpg
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English: Trencherfield Mill - the barring engine, near to Ince-in-Makerfield, Wigan, Great Britain.
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. |
| Date | |
| Source | From geograph.org.uk; transferred by User:Andy Dingley using geograph_org2commons. |
| Author | Chris Allen |
| Permission (Reusing this file) |
Creative Commons Attribution Share-alike license 2.0 |
| Attribution (required by the license) | Chris Allen / Trencherfield Mill - the barring engine / |
| Camera location |   | View this and other nearby images on: OpenStreetMap |  |
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| Object location | | View this and other nearby images on: OpenStreetMap | |
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_region:GB-GBN_heading:247.00&language=en){kind=link}
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This image was taken from the Geograph project collection. See this photograph's page on the Geograph website for the photographer's contact details. The copyright on this image is owned by Chris Allen and is licensed for reuse under the Creative Commons Attribution-ShareAlike 2.0 license.
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This file is licensed under the Creative Commons Attribution-Share Alike 2.0 Generic license.
Attribution: Chris Allen
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 02:36, 5 January 2011 | | 408 × 640 (78 KB) | File Upload Bot (Magnus Manske) (talk | contribs) |
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