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Windmill Fantail
A fantail is a small windmill mounted at right angles to the sails, at the rear of the windmill, and which turns the cap automatically to bring it into the wind. The fantail was patented in 1745 by Edmund Lee, a blacksmith working at Brockmill Forge near Wigan, England, and was perfected on mills around Leeds and Hull towards the end of the 18th century. Fantails are found on all types of traditional windmills and are especially useful where changes in wind direction are frequent. They are more common in England, Denmark and Germany than in other parts of Europe, and are little-known on windmills elsewhere except where English millwrighting traditions were in evidence. The rotating fantail turns the cap of the windmill via a system of gearing to a toothed rack around the top of the mill tower, or to wheels running on the ground in the case of a 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DK Fanoe Windmill01
DK (or variants) may refer to: In arts and entertainment Film and television * ''DK'' (film), a 2015 Indian film * Derek "DK" Kitson, a character in the television series ''Third Watch'', played by Derek Kelly * Dark Kingdom (professional wrestling), a professional wrestling stable * Discovery Kids Music * DK (band), a Soviet rock band * DK (singer), South Korean singer and member of Seventeen * Deekay, a music production team * Danity Kane, an American female music group * Darren Knott, British disc jockey and record producer * Dave Koz, American saxophonist * Dead Kennedys, American punk band Other media * Diels–Kranz numbering, a standard system for referencing the works of the pre-Socratic philosophers * Donkey Kong (character), a video game character * Diddy Kong, a video game character * Dixie Kong, a video game character * DistroKid, an American independent digital music service Businesses and organizations * DK (publisher) (Dorling Kindersley), an internatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Right Angle
In geometry and trigonometry, a right angle is an angle of exactly 90 Degree (angle), degrees or radians corresponding to a quarter turn (geometry), turn. If a Line (mathematics)#Ray, ray is placed so that its endpoint is on a line and the adjacent angles are equal, then they are right angles. The term is a calque of Latin ''angulus rectus''; here ''rectus'' means "upright", referring to the vertical perpendicular to a horizontal base line. Closely related and important geometrical concepts are perpendicular lines, meaning lines that form right angles at their point of intersection, and orthogonality, which is the property of forming right angles, usually applied to Euclidean vector, vectors. The presence of a right angle in a triangle is the defining factor for right triangles, making the right angle basic to trigonometry. Etymology The meaning of ''right'' in ''right angle'' possibly refers to the Classical Latin, Latin adjective ''rectus'' 'erect, straight, upright, perp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Windmill
A windmill is a machine operated by the force of wind acting on vanes or sails to mill grain (gristmills), pump water, generate electricity, or drive other machinery. 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 have been known earlier, the Babylonian emperor Hammurabi had used wind mill power for his irrigation project in Mesopotamia in the 17th century BC. Later, 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 zur westlichen Windmühle", ''Archiv für Kulturgeschichte'', Vol. 77, Issue 1 (1995), pp. 1–30 (10f.) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wigan
Wigan ( ) is a town in Greater Manchester, England. The town is midway between the two cities of Manchester, to the south-east, and Liverpool, to the south-west. It is the largest settlement in the Metropolitan Borough of Wigan and is its administrative centre. The town has a population of 107,732 and the wider borough of 330,714. Wigan is part of the Historic counties of England, historic county of Lancashire. Wigan was in the territory of the Brigantes, an ancient List of ancient Celtic peoples and tribes, Celtic tribe that ruled much of what is now Northern England. The Brigantes were subjugated in the Roman conquest of Britain and the Roman settlement of was established where Wigan lies. Wigan was incorporated as a Borough status in the United Kingdom, borough in 1246, following the issue of a charter by Henry III of England, King Henry III of England. At the end of the Middle Ages, it was one of four boroughs in Lancashire established by royal charter. The Industrial Re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leeds
Leeds is a city in West Yorkshire, England. It is the largest settlement in Yorkshire and the administrative centre of the City of Leeds Metropolitan Borough, which is the second most populous district in the United Kingdom. It is built around the River Aire and is in the eastern foothills of the Pennines. The city was a small manorial borough in the 13th century and a market town in the 16th century. It expanded by becoming a major production and trading centre (mainly with wool) in the 17th and 18th centuries. Leeds developed as a mill town during the Industrial Revolution alongside other surrounding villages and towns in the West Riding of Yorkshire. It was also known for its flax industry, iron foundries, engineering and printing, as well as shopping, with several surviving Victorian era arcades, such as Kirkgate Market. City status was awarded in 1893, and a populous urban centre formed in the following century which absorbed surrounding villages and overtook t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kingston Upon Hull
Kingston upon Hull, usually shortened to Hull, is a historic maritime city and unitary authorities of England, unitary authority area in the East Riding of Yorkshire, England. It lies upon the River Hull at its confluence with the Humber Estuary, inland from the North Sea. It is a tightly bounded city which excludes the majority of its suburbs, with a population of (), it is the fourth-largest city in the Yorkshire and the Humber region. The built-up area has a population of 436,300. Hull has more than 800 years of seafaring history and is known as Yorkshire's maritime city. The town of Wyke on Hull was founded late in the 12th century by the monks of Meaux Abbey as a port from which to export their wool. Renamed ''Kings-town upon Hull'' in 1299, Hull had been a market town, military supply port, trading centre, fishing and whaling centre and industrial metropolis. Hull was an early theatre of battle in the First English Civil War, English Civil Wars. Its 18th-century ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gear
A gear or gearwheel is a rotating machine part typically used to transmit rotational motion and/or torque by means of a series of teeth that engage with compatible teeth of another gear or other part. The teeth can be integral saliences or cavities machined on the part, or separate pegs inserted into it. In the latter case, the gear is usually called a cogwheel. A cog may be one of those pegsDefinition of "cog" in the ''Oxford Learner's Dictionary'' online. Accessed on 2024-07-29.Definition of "cog" in the ''Merriam-Webster Dictionary'' online. Accessed on 2024-07-29. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rack And Pinion
rack and pinion is a type of linear actuator that comprises a circular gear (the '' pinion'') engaging a linear gear (the ''rack''). Together, they convert between rotational motion and linear motion: rotating the pinion causes the rack to be driven in a line. Conversely, moving the rack linearly will cause the pinion to rotate. The rack and pinion mechanism is used in rack railways, where the pinion mounted on a locomotive or a railroad car engages a rack usually placed between the rails, and helps to move the train up a steep gradient. It is also used in arbor presses and drill presses, where the pinion is connected to a lever and displaces a vertical rack (the ram). In pipelines and other industrial piping systems, a rack displaced by a linear actuator turns a pinion to open or close a valve. Stairlifts, lock gates, electric gates, and the mechanical steering mechanism of cars are other notable applications. The term "rack and pinion" may be used also when the rac ... [...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 central vertical post. The vertical post is supported by four quarter bars. These are struts that steady the central post. 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 :File:Saxtead Green Post Mill - geograph.org.uk - 514428.jpg, Saxtead Green, the arm carries a windmill fantail, 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. Outwood Windmill, 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 exam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
