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Dragline excavator
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==Operation== [[File:Dragline excavator.png|upright=1.3|thumb|Dragline excavator]] In a typical cycle of excavation, the bucket is positioned above the material to be excavated.<ref>{{Cite journal|last1=Mirabediny|first1=H.|last2=Baafi|first2=E.|date=1998-01-01|title=Dragline Digging Methods in Australian Strip Mines β A Survey|url=https://ro.uow.edu.au/coal/278|journal=Coal Operators' Conference}}</ref> The bucket is then lowered and the [[Rope drag|dragrope]] is then drawn so that the bucket is dragged along the surface of the material. The bucket is then lifted by using the [[Hoist (mining)|hoist rope]]. A swing operation is then performed to move the bucket to the place where the material is to be dumped. The dragrope is then released causing the bucket to tilt and empty. This is called a dump operation. On crane-type draglines, the bucket can also be 'thrown' by [[winding]] up to the jib and then releasing a [[clutch]] on the drag cable. This would then swing the bucket like a [[pendulum]]. Once the bucket had passed the vertical, the hoist cable would be released thus throwing the bucket. On smaller draglines, a skilled operator could make the bucket land about one-half the length of the jib further away than if it had just been dropped. On larger draglines, this is not a common practice.
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