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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 ...
Dutch windmill Dutch: De Noord, Schiedam. 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 wind; this allows more space for the machinery as well as for storage.
Medieval technology is the technology in medieval Europe under Christian rule.After the Renaissance of the 12th century, medieval Europe saw a radical change in the rate of new inventions, innovations in the ways of managing traditional means of production, and economic growth. [2]
The earliest recorded windmill design found was Persian in origin, and was invented sometime around 700–900 AD. [3] [4] This design was the panemone, with vertical lightweight wooden sails attached by horizontal struts to a central vertical shaft. It was first built to pump water, and subsequently modified to grind grain as well. [1]
St Margaret's Bay Windmill is a three-storey smock mill on a single-storey brick base. It has four patent sails and is winded by a fantail. [ 2 ] The mill generated electricity via a dynamo and is now used as residential accommodation, a use it has always had.
Medieval ships were the vessels used in Europe during the Middle Ages. Like ships from antiquity , they were moved by sails , oars , or a combination of the two. There was a large variety, mostly based on much older, conservative designs.