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The common sail is the simplest form of sail. In medieval mills, the sailcloth was wound in and out of a ladder-type arrangement of sails. Medieval sails could be constructed with or without outer sailbars. Post-medieval mill sails have a lattice framework over which the sailcloth is spread. There are various "reefs" for the different spread of ...
The windmills at Kinderdijk in the village of Kinderdijk, Netherlands is a UNESCO World Heritage Site. A windmill is a structure that converts wind power into rotational energy using vanes called sails or blades, by tradition specifically to mill grain (), but in some parts of the English-speaking world, the term has also been extended to encompass windpumps, wind turbines, and other applications.
The body of the windmill can be turned around the central post to bring the sails into the wind. All post mills have an arm projecting from them on the side opposite the sails and reaching down to near ground level. With some, as at Saxtead Green, the arm carries a fantail to turn the mill automatically. With the others the arm serves to rotate ...
Download QR code; Print/export Download as PDF; Printable version; In other projects Wikimedia Commons; Wikidata item; Appearance. ... Windmill sail; Windmills of Corvo;
The windmill has a pair of common sails and a pair of spring sails, carried by a wooden windshaft with a cast iron poll end. The mill has two pairs of millstones , arranged head and tail. The head stones are Derbyshire Peak stones are used for rough grinding, while the tail stones are made from pieces of French Burrstone , embedded in plaster ...
Early medieval post mills had their trestles partly buried in the ground. This gave the mill stability, but had the disadvantage that the trestle would rot where it met the ground. This type of mill was called the Sunk post mill. [1] By making the mill bigger, it was possible to raise the trestle out of the ground. [2]
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Lowfield Heath Windmill is a post mill with a single storey roundhouse. Winding is by tailpole. It originally had four Common sails, and was last worked with four Patent sails carried on a cast iron Windshaft. The mill drives two pairs of millstones arranged Head and Tail. The Head Wheel is 9 feet (2.74 m) diameter with 111 cogs and the Tail ...