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Click on any photo for larger imageHYDRA 300T
30 ton lift |
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| The Hydra 30 ton along with the smaller 15 ton were the main production cranes of the Sunderland factory where there was a quite an impressive production line. |
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The lifting capacity of the Hydra 300 was 30 tons, this is the maximum lift which can be made and is with the shortest reach. What was usually more important was the maximum reach. Charts and tables show how much the cane can lift at any particular reach, as the example below. |
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| The most significant thing about this generation of crane was the development of the stabilised telescopic arm. This could extend uniformly without affecting the position of the load being lifted. (Select here for details of how these telescopic arms work.) The hydraulic telescopic part of the crane arm was often supplemented a manual extension and by a fly jib. These extensions were used to extended reach of the crane. The fly jib was carried ether under or at the side of the normal jib. |
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Even while I was working there the 50 ton mobile crane was on the drawing board with a sixteen wheeled tractor unit. These models were often given to clients who were ordering a large number of the units. |
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