The Jubilee Crane.

Progress, Volume IV, Issue 8, 1 June 1909, Page 269

The Jubilee Crane.

In the accompanying illustration we show a "Jubilee" steam-crane navvy, built by Messrs. John H. Wilson and Co., Ltd., of Sandhills, Liverpool. This machine is of the latest pattern, and is stated to be considerably more powerful than the earlier

navvies. Its total weight is about 44 tons, exclusive of coal and water, and it is capable of working out a cutting 50ft. wide and 16ft. deep without dumping. The digging-bucket has a capacity of 2% cubic yards, and is fed direct up to its work by means of a steam racking cylinder bolted to - the bucket-arm and worked from the driver's platform. As a crane, the navvy will lift a load of 15 tons at 16ft. radius, and motions are provided for lifting and lowering, revolving, jib-adjusting, and travelling. The engine has two cylinders, and the boiler is of the marine type, for a working pressure of 1001b. per square inch.