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PostPosted: 20 Jan 2014, 16:39 
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Joined: 29 Dec 2010, 13:10
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Does anyone know the weight of a Cowans 50 Ton Breakdown Crane?


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PostPosted: 20 Jan 2014, 19:03 
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Joined: 15 Dec 2010, 22:30
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Location: North Cambridgeshire, UK
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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