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The Beardmore Crane was a giant cantilever crane at the William Beardmore and Company yard. ==Design== The Beardmore Crane had two opposite cantilevered jibs, both equipped with moving winches, for a total length of .〔 From the job to the ground extended a tapering lattice, which was enclosed by a lattice tower. The jib was slewed by a mechanism on the ground, and bearings at the top of the tower and where the extension met the ground allowed it to turn.〔 The winch on each arm was powered by two electric motors for hoisting and two motors for slewing, and a motor for slewing.〔 The tower took eight minutes to make a full revolution.〔 The height of the rail on which the winches ran was , and communication with the operator was by speaking tube.〔 The total weight of the structure was over .〔 Upon completion, the shorter arm was tested to lift at a radius of and the longer arm could lift at a radius of .〔 Railway tracks running beneath the crane allowed material to be moved from the workshops. It was used for fitting out ships, installing very heavy items such as boilers, armour and guns. The basin it served was the largest in the world at the time of its completion. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Beardmore Crane」の詳細全文を読む スポンサード リンク
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