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Weight of a Cowans 50 Ton Breakdown Crane http://www.bdca.org.uk/forumtwo/viewtopic.php?f=3&t=344 |
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Author: | Peter Jennings [ 20 Jan 2014, 16:39 ] |
Post subject: | Weight of a Cowans 50 Ton Breakdown Crane |
Does anyone know the weight of a Cowans 50 Ton Breakdown Crane? |
Author: | David Withers [ 20 Jan 2014, 19:03 ] |
Post subject: | Re: Weight of a Cowans 50 Ton Breakdown Crane |
It is recorded by Peter Tatlow that the total weight of the crane with jib runner was 111 tons 16 cwt prior to the 1938 uprating from 36 to 50 tons. I can find no reference to the additional mass brought about by the uprating but would imagine that it wasn't significant. As I expect you are aware, the uprating entailed an increase in the circumference of the hoist rope from 3.1/2 to 4 inches, with new sheaves profiled to match (but with the same diameter as before), presumably a new hoist drum to suit the larger rope, a larger ram's-horn, and the provision of screw jacks and ratchet gear for the girders. What would that add up to - an extra couple of tons at the most? Play safe at 114 tons all-in dry weight? It would be interesting to know the purpose behind your question. |
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