If it's fast and dangerous then Jeremy Clarkson has included it in this programme of balloons, helicopters, fighter planes, jet boats and more.

Extreme Machines - Netflix

Type: Documentary

Languages: English

Status: Ended

Runtime: 30 minutes

Premier: 1998-01-08

Extreme Machines - Bucket-wheel excavator - Netflix

Bucket-wheel excavators (BWEs) are heavy equipment used in surface mining. The primary function of BWEs is to act as a continuous digging machine in large-scale open-pit mining operations. What sets BWEs apart from other large-scale mining equipment, such as bucket chain excavators, is their use of a large wheel consisting of a continuous pattern of buckets used to scoop material as the wheel turns. They are among the largest vehicles ever constructed, and the biggest bucket-wheel excavator ever built, Bagger 293, is the largest terrestrial (land) vehicle in history by weight (14,200 tonnes), according to the Guinness Book of World Records.

Extreme Machines - Operation - Netflix

BWEs are used for continuous overburden removal in surface mining applications. They use their cutting wheels to strip away a section of earth (the working block) dictated by the size of the excavator. Through hoisting, the working block can include area both above and below the level of the machine (the bench level). By slewing, the excavator can reach through a horizontal range. The overburden is then delivered to the discharge boom, which transfers the cut earth to another machine for transfer to a spreader. This may be a fixed belt conveyor system or a mobile conveyor with crawlers similar to those found on the BWE. Mobile conveyors permanently attached to the excavator take the burden of directing the material off of the operator. The overburden can also be transferred directly to cross-pit Spreader, which reaches across the pit and scatters overburden at the dumping ground.

Extreme Machines - References - Netflix