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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 sails; these are full sail, dagger point, sword point and first reef. The mill must be stopped in order to adjust the reefing of the sail. [1]
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 ...
The mill was built for £529, 11s in 1775–1776, on land owned by the surgeon Herbert Jones. [1] [2] It is classified as a tower mill.The machinery is within a stone tower and the moving top, or cap cwch, turns so that the sails hwyliau catch the wind from any direction.
The mill was dismantled c1860, and the body was moved to the grounds of the medieval hall known as Houghton Park Farm, now The Old Hall. The Mill was part of the complex of outbuildings, which later became Alder Carr Farm. [2] The mill had Patent sails, which were transferred to a tower mill at Kersey when the mill was dismantled. [4]
To increase windmill efficiency millwrights experimented with different methods: automated patent-sails instead of cloth spread type sails didn't need the sail cross to be stopped to spread or remove the cloth sails because they altered the surface from inside the mill by means of a controlling gear.
No. of sails: Four sails: Type of sails: Common sails: Windshaft: cast iron and wood: Winding: Internal winding with medieval winding gears: No. of pairs of millstones: Two pairs: Size of millstones: 1,450 millimetres (4.76 ft) diameter: Other information: Uses a mound instead of stage to set the sails. Oldest existing windmill of the Netherlands.
Stembridge Mill is a tower mill, a type of windmill which consists of a brick or stone tower, on top of which sits a roof or cap which can be turned to bring the sails into the wind. [13] The advantage of the tower mill over the earlier post mill is that it is not necessary to turn the whole mill ("body", "buck") with all its machinery into the ...