Laxey Wheel

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The Laxey Wheel (also known as Lady Isabella) is built into the hillside above the village of Laxey in the Isle of Man. It is the largest surviving original working waterwheel in the world.<ref>The Great Laxey Wheel at Manx National Heritage. Retrieved 26 October 2022</ref> Designed by Robert Casement, the wheel has a Template:Convert diameter, is Template:Convert wide and revolves approximately three times per minute.

HistoryEdit

The wheel was built in 1854 to pump water from the Glen Mooar part of the Great Laxey Mines industrial complex. It was named Lady Isabella after the wife of Lieutenant Governor Charles Hope, who was the island's governor at that time.

The wheel is currently maintained by Manx National Heritage as part of the Great Laxey Wheel & Mines Trail.

The wheel features today on the reverse of the £20 notes issued by the Isle of Man Government.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

Technical detailsEdit

A water-powered wheel was used because the Isle of Man has no supply of coal for a steam-powered pump.

Water from the surrounding area – including a number of local springs and streams – is collected in a cistern, which is above the level of the top of the wheel. A closed pipe connects the cistern to the top of the wheel; thus the water flows up the tower as an inverted syphon. The water falls from the pipe into the buckets (formed from wooden slats on the circumference) and makes the wheel rotate in what is described as the 'reverse' direction: it is a backshot wheel. The crank has a throw of Template:Convert and connects to a counterweight and to a very long rod. This rod runs along the rod viaduct to the pumping shaft 200m away, where the Template:Convert stroke is converted by a T-rocker into a pumping action.

Most of the wheel and rod is made of wood; while key mechanical parts are metal to provide tension and bearing surfaces. The rod has wheels attached at intervals to permit the stroke's motion with minimal friction.

File:Laxey Wheel 08676u.jpg

A historical image from around 1900

File:Laxey wheel 1.JPG

The triskelion on the front of the wheel is backwards. This happened by accident when the image was being transferred onto the wall; they forgot to reverse it, so it is actually a mirror image of the symbol of Mann.

File:Pump mechanism operated by the Laxey Wheel - geograph.org.uk - 476326.jpg

The T-rocker, which transfers the horizontal motion of the crank on the waterwheel axle into a vertical motion to work the pumps in the mine.

DimensionsEdit

Diameter: 72 ft 6 in. (22.1 m)
Delivery: Template:Convert of water a minute from the Laxey mines some Template:Convert away and Template:Convert below ground

MineEdit

{{#invoke:Labelled list hatnote|labelledList|Main article|Main articles|Main page|Main pages}} The mine employed over 600 miners at its peak, producing lead, copper, silver and zinc until it closed in 1929. In 1965 the Manx Government bought the wheel and site. The wheel was restored; in 1989 it was put under the control of Manx National Heritage.