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Mellemolen, Akkrum
Mellemolen, formerly known as the Polslootpoldermolen (English: ''Polsloot Polder Mill'') or Spookmolen (English: ''Ghost Mill'') is a hollow post mill in Akkrum, Friesland, Netherlands which has been restored to working order. The mill is listed as a Rijksmonument, number 35937. History ''De Polslpootpoldermolen'' was marked on a map of Utingeradeel dated 1849. The mill was then known as the Spookmolen. In 1947 it was decided to replace the mill with an electrically powered pump. Permission was sought to demolish the mill but this was denied, as it was again in 1952. The mill was repaired in 1961 and 1971. On 13 November 1972 the mill was blown down in a storm. It was restored in 1976 at a cost of f80,000. At this time it was owned by the Gemeente Boarnsterhim and stood at Ulbe Twijnstrawel 21, 8491 CD, Akkrum. The mill's condition again deteriorated under the ownership of the Gemeente Boarnsterhim. Concern was expressed about its condition by the Monumentenzorg and De Holland ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Post Mill
The post mill is the earliest type of European windmill. Its defining feature is that the whole body of the mill that houses the machinery is mounted on a single vertical post, around which it can be turned 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 into the wind by hand. The earliest post mills in England are thought to have been built in the 12th century. The earliest working post mill in England still used today is to be found at Outwood, Surrey. It was built in 1665. The earliest remaining example of a non-operational mill can be found in Great Gransden in Cambridgeshire, built in 1612.Windmills in Huntingdon and Peterborough. p. 3. Their design and usage peaked in the 18th and 19th centuries and then declined after the introdu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Windmills Completed In 2004
A windmill is a structure that converts wind power into rotational energy using vanes called sails or blades, specifically to mill grain (gristmills), but the term is also extended to windpumps, wind turbines, and other applications, in some parts of the English speaking world. The term wind engine is sometimes used to describe such devices. Windmills were used throughout the high medieval and early modern periods; the horizontal or panemone windmill first appeared in Persia during the 9th century, and the vertical windmill first appeared in northwestern Europe in the 12th century. Regarded as an icon of Dutch culture, there are approximately 1,000 windmills in the Netherlands today. Forerunners Wind-powered machines may have been known earlier, but there is no clear evidence of windmills before the 9th century. Hero of Alexandria (Heron) in first-century Roman Egypt described what appears to be a wind-driven wheel to power a machine.Dietrich Lohrmann, "Von der östlichen z ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Windmills In Friesland
A windmill is a structure that converts wind power into rotational energy using vanes called sails or blades, specifically to mill grain (gristmills), but the term is also extended to windpumps, wind turbines, and other applications, in some parts of the English speaking world. The term wind engine is sometimes used to describe such devices. Windmills were used throughout the high medieval and early modern periods; the horizontal or panemone windmill first appeared in Persia during the 9th century, and the vertical windmill first appeared in northwestern Europe in the 12th century. Regarded as an icon of Dutch culture, there are approximately 1,000 windmills in the Netherlands today. Forerunners Wind-powered machines may have been known earlier, but there is no clear evidence of windmills before the 9th century. Hero of Alexandria (Heron) in first-century Roman Egypt described what appears to be a wind-driven wheel to power a machine.Dietrich Lohrmann, "Von der östlichen z ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trestle (mill)
The trestle of a post mill is the arrangement of the ''main post'', ''crosstrees'' and ''quarterbars'' that form the substructure of this type of windmill. It may or may not be surrounded by a '' roundhouse''. Post mills without a roundhouse are known as ''open trestle post mills''. A trestle mill is a variety of smock mill, usually without weatherboards, formerly used for drainage in the Norfolk Broads. Examples can be found at Horning, Ludham and St Olaves St Olaves is a village in the English county of Norfolk. The village is situated on the River Waveney, south-west of the town of Great Yarmouth and the same distance north-west of the Suffolk town of Lowestoft. It is within The Broads nation .... A well preserved example of a timber crosstree, from the trestle of a medieval windmill, was excavated by archaeologists at Humberstone, near Leicester, in 2007. References ;Sources * * * * {{Renewable-energy-stub Post mills Smock mills ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Millwright
A millwright is a craftsperson or skilled tradesperson who installs, dismantles, maintains, repairs, reassembles, and moves machinery in factories, power plants, and construction sites. The term ''millwright'' (also known as ''industrial mechanic'') is mainly used in the United States, Canada and South Africa to describe members belonging to a particular trade. Other countries use different terms to describe tradesmen engaging in similar activities. Related but distinct crafts include machinists, mechanics and mechanical fitters . As the name suggests, the original function of a millwright was the construction of flour mills, sawmills, paper mills and fulling mills powered by water or wind, made mostly of wood with a limited number of metal parts. Since the use of these structures originates in antiquity, millwrighting could arguably be considered one of the oldest engineering trades and the forerunner of modern mechanical engineering. In modern usage, a millwright is engaged ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Octagon
In geometry, an octagon (from the Greek ὀκτάγωνον ''oktágōnon'', "eight angles") is an eight-sided polygon or 8-gon. A '' regular octagon'' has Schläfli symbol and can also be constructed as a quasiregular truncated square, t, which alternates two types of edges. A truncated octagon, t is a hexadecagon, . A 3D analog of the octagon can be the rhombicuboctahedron with the triangular faces on it like the replaced edges, if one considers the octagon to be a truncated square. Properties of the general octagon The sum of all the internal angles of any octagon is 1080°. As with all polygons, the external angles total 360°. If squares are constructed all internally or all externally on the sides of an octagon, then the midpoints of the segments connecting the centers of opposite squares form a quadrilateral that is both equidiagonal and orthodiagonal (that is, whose diagonals are equal in length and at right angles to each other).Dao Thanh Oai (2015), "Equilatera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tzummarum
Tzummarum ( fry, Tsjummearum) is a village in Waadhoeke municipality in the province of Friesland, the Netherlands. It had a population of around 1,414 in January 2014. History The village was first mentioned in the 13th century as de Thumarentum, and means "settlement of Tyedmar (person)". Tzummarum is a ''dorp'' (artificial living hill) village which developed in the 8th century along the Wadden Sea. It was mainly a fishing village. In 1861, the road to Minnertsga was built and village expanded along the road. The Dutch Reformed church dates from the early-16th century. In 1876 or 1877, the church was replaced, but as a copy of the previous church except for a new spire. Tzummarum was home to 1,079 people in 1840. Het Wapen van Barradeel was the former town hall and pub. It is a neoclassic building constructed around 1860 and served as town hall until 1903. A railway station was located in Tzummarum between 1902 and 1936. In 1991, the , a hoard containing 2,800 silver coins ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
De Hollandsche Molen
Vereniging De Hollandsche Molen () ( en, Dutch Windmill Association) is a Dutch organization founded in 1923 to preserve windmills in the Netherlands, to document them, and to restore them. Financial support comes from members and from grants by organizations such as the (a Dutch lottery). Their website provides access to a database which documents some 1400 mills in the Netherlands; "Het Nederlands Molenbestand" is authoritative on the topic. The organization is often given credit for organizing a powerful and effective lobby aimed at procuring money from Dutch government institutions to fund restoration projects. Its former president Frederik Stokhuyzen was one of the foremost scholars on Dutch windmills; a recently revised edition of his 1961 book ''Molens'' is still the standard book on the topic. In 1981, Prince Claus of the Netherlands became the organization's patron, and attended ten ceremonies at which windmills were reopened; at his death in 2002 the 12 windmills owned ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boarnsterhim
Boarnsterhim (; nl, Boornsterhem ) was a municipality in the northern Netherlands. On 1 January 2014, the municipality was dissolved and its territory was split between four other municipalities: De Friese Meren, which was established that day, Leeuwarden, Heerenveen and Súdwest-Fryslân. Population centres Akkrum, Aldeboarn (''Oldeboorn''), Dearsum (''Deersum''), Eagum (''Aegum''), Friens, Grou (''Grouw''), Idaerd (''Idaard''), Jirnsum (''Irnsum''), Nes, Poppenwier (''Poppingawier''), Raerd (''Rauwerd''), Reduzum (''Roordahuizum''), Sibrandabuorren (''Sijbrandaburen''), Terherne (''Terhorne''), Tersoal (''Terzool''), Warstiens, Warten (''Wartena''), Wergea (''Warga''). (Dutch names) Transportation Railway stations * Akkrum Akkrum is a village in the Dutch province of Friesland. It is located in the municipality Heerenveen, about 17 km south of the city of Leeuwarden. Akkrum had about 3,395 inhabitants in 2017. History The village was first mentioned in 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Windmill Sail
Windmills are powered by their sails. Sails are found in different designs, from primitive common sails to the advanced patent sails. Jib sails The jib sail is found in Mediterranean countries and consists of a simple triangle of cloth wound round a spar. The mill must be stopped in order to adjust the reefing of the sail. Though rare in the UK, at least two windmills are known to have had jib sails (St Mary's, Isle of Scilly and Cann Mills, Melbury Abbas). Image:Windmill Antimahia Kos.jpg, Jib sails Image:Sobreiro.jpg, More fully spread Image:Spanish Mill, St Mary's.jpg, St Mary's, Isles of Scilly File:Cann Mill, Melbury Abbas.jpg, Cann Mills, Melbury Abbas Common sails 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 variou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gemeente
As of 24 March 2022, there are 344 municipalities ( nl, gemeenten) and three Caribbean Netherlands, special municipalities () in the Netherlands. The latter is the status of three of the six island territories that make up the Dutch Caribbean. Municipalities are the second-level administrative division, or Public body (Netherlands), public bodies (), in the Netherlands and are subdivisions of their respective Provinces of the Netherlands, provinces. Their duties are delegated to them by the Cabinet of the Netherlands, central government and they are ruled by a Municipal council (Netherlands), municipal council that is elected every four years. Municipal Merger (politics), mergers have reduced the total number of municipalities by two-thirds since the first official boundaries were created in the mid 19th century. Municipalities themselves are informally subdivided into districts and neighbourhoods for administrative and statistical purposes. These municipalities come in a wide r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
