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A windmill is a machine operated by the force of wind acting on vanes or
sails A sail is a tensile structure, which is made from fabric or other membrane materials, that uses wind power to propel sailing craft, including sailing ships, sailboats, windsurfers, ice boats, and even sail-powered land vehicles. Sails may b ...
to
mill Mill may refer to: Science and technology * Factory * Mill (grinding) * Milling (machining) * Millwork * Paper mill * Steel mill, a factory for the manufacture of steel * Sugarcane mill * Textile mill * List of types of mill * Mill, the arithmetic ...
grain (
gristmill A gristmill (also: grist mill, corn mill, flour mill, feed mill or feedmill) grinds cereal grain into flour and Wheat middlings, middlings. The term can refer to either the grinding mechanism or the building that holds it. Grist is grain that h ...
s), pump water, generate electricity, or drive other machinery. Windmills were used throughout the
high medieval The High Middle Ages, or High Medieval Period, was the periodization, period of European history between and ; it was preceded by the Early Middle Ages and followed by the Late Middle Ages, which ended according to historiographical convention ...
and
early modern period The early modern period is a Periodization, historical period that is defined either as part of or as immediately preceding the modern period, with divisions based primarily on the history of Europe and the broader concept of modernity. There i ...
s; the horizontal or
panemone windmill A panemone windmill is a type of vertical-axis wind turbine. It has a rotating axis positioned vertically, while the wind-catching blades move parallel to the wind. By contrast, the shaft of a horizontal-axis wind turbine (HAWT) points into the ...
first appeared in
Persia Iran, officially the Islamic Republic of Iran (IRI) and also known as Persia, is a country in West Asia. It borders Iraq to the west, Turkey, Azerbaijan, and Armenia to the northwest, the Caspian Sea to the north, Turkmenistan to the nort ...
during the 9th century, and the vertical windmill first appeared in
northwestern Europe Northwestern Europe, or Northwest Europe, is a loosely defined subregion of Europe, overlapping Northern and Western Europe. The term is used in geographic, history, and military contexts. Geographic definitions Geographically, Northwestern ...
in the 12th century. Regarded as an icon of
Dutch culture Dutch culture may refer to: * used more narrowly, the Culture of the Netherlands * used more widely, the culture of Dutch-speaking Europe, including: **Dutch architecture **Dutch literature ** Dutch music ** Dutch festivities **Dutch folklore Se ...
, there are approximately 1,000 windmills in the
Netherlands , Terminology of the Low Countries, informally Holland, is a country in Northwestern Europe, with Caribbean Netherlands, overseas territories in the Caribbean. It is the largest of the four constituent countries of the Kingdom of the Nether ...
today.


Forerunners

Wind-powered Wind power is the use of wind energy to generate useful work. Historically, wind power was used by sails, windmills and windpumps, but today it is mostly used to generate electricity. This article deals only with wind power for electricity ge ...
machines have been known earlier, the
Babylonia Babylonia (; , ) was an Ancient history, ancient Akkadian language, Akkadian-speaking state and cultural area based in the city of Babylon in central-southern Mesopotamia (present-day Iraq and parts of Kuwait, Syria and Iran). It emerged as a ...
n emperor
Hammurabi Hammurabi (; ; ), also spelled Hammurapi, was the sixth Amorite king of the Old Babylonian Empire, reigning from to BC. He was preceded by his father, Sin-Muballit, who abdicated due to failing health. During his reign, he conquered the ci ...
had used
wind mill 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; ...
power for his irrigation project in
Mesopotamia Mesopotamia is a historical region of West Asia situated within the Tigris–Euphrates river system, in the northern part of the Fertile Crescent. Today, Mesopotamia is known as present-day Iraq and forms the eastern geographic boundary of ...
in the 17th century BC. Later,
Hero of Alexandria Hero of Alexandria (; , , also known as Heron of Alexandria ; probably 1st or 2nd century AD) was a Greek mathematician and engineer who was active in Alexandria in Egypt during the Roman era. He has been described as the greatest experimental ...
(Heron) in first-century
Roman Egypt Roman Egypt was an imperial province of the Roman Empire from 30 BC to AD 642. The province encompassed most of modern-day Egypt except for the Sinai. It was bordered by the provinces of Crete and Cyrenaica to the west and Judaea, ...
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.) A. G. Drachmann, "Hero's Windmill", ''Centaurus'', 7 (1961), pp. 145–151 His description of a wind-powered
organ Organ and organs may refer to: Biology * Organ (biology), a group of tissues organized to serve a common function * Organ system, a collection of organs that function together to carry out specific functions within the body. Musical instruments ...
is not a practical windmill but was either an early wind-powered toy or a design concept for a wind-powered machine that may or may not have been a working device, as there is ambiguity in the text and issues with the design. Another early example of a wind-driven wheel was the
prayer wheel A prayer wheel, or mani wheel, is a cylindrical wheel (, ) for Buddhist recitation. The wheel is installed on a spindle made from metal, wood, stone, leather, or coarse cotton. Prayer wheels are common in Tibet and areas where Tibetan culture ...
, which is believed to have been first used in
Tibet Tibet (; ''Böd''; ), or Greater Tibet, is a region in the western part of East Asia, covering much of the Tibetan Plateau and spanning about . It is the homeland of the Tibetan people. Also resident on the plateau are other ethnic groups s ...
and
China China, officially the People's Republic of China (PRC), is a country in East Asia. With population of China, a population exceeding 1.4 billion, it is the list of countries by population (United Nations), second-most populous country after ...
, though there is uncertainty over the date of its first appearance, which could have been either , the 7th century, or after the 9th century. One of the earliest recorded working windmill designs found was invented sometime around 700–900 AD in
Persia Iran, officially the Islamic Republic of Iran (IRI) and also known as Persia, is a country in West Asia. It borders Iraq to the west, Turkey, Azerbaijan, and Armenia to the northwest, the Caspian Sea to the north, Turkmenistan to the nort ...
. 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 A grain is a small, hard, dry fruit (caryopsis) – with or without an attached husk, hull layer – harvested for human or animal consumption. A grain crop is a grain-producing plant. The two main types of commercial grain crops are cereals and ...
as well.


Horizontal windmills

The first practical windmills were
panemone windmill A panemone windmill is a type of vertical-axis wind turbine. It has a rotating axis positioned vertically, while the wind-catching blades move parallel to the wind. By contrast, the shaft of a horizontal-axis wind turbine (HAWT) points into the ...
s, using sails that rotated in a horizontal plane, around a vertical axis. Made of six to 12 sails covered in reed matting or cloth material, these windmills were used to grind grain or draw up water.Wailes, R. Horizontal Windmills. London, Transactions of the Newcomen Society vol. XL 1967–68 pp 125–145 A medieval account reports that windmill technology was used in
Persia Iran, officially the Islamic Republic of Iran (IRI) and also known as Persia, is a country in West Asia. It borders Iraq to the west, Turkey, Azerbaijan, and Armenia to the northwest, the Caspian Sea to the north, Turkmenistan to the nort ...
and the Middle East during the reign of
Rashidun The Rashidun () are the first four caliphs () who led the Muslim community following the death of Muhammad: Abu Bakr (), Umar (), Uthman (), and Ali (). The reign of these caliphs, called the Rashidun Caliphate (632–661), is considered i ...
caliph
Umar ibn al-Khattab Umar ibn al-Khattab (; ), also spelled Omar, was the second Rashidun caliph, ruling from August 634 until his assassination in 644. He succeeded Abu Bakr () and is regarded as a senior companion and father-in-law of the Islamic prophet Muh ...
(), based on the caliph's conversation with a Persian builder slave. The authenticity of part of the anecdote involving the caliph Umar is questioned because it was recorded only in the 10th century. The
Persian geographer Persian may refer to: * People and things from Iran, historically called ''Persia'' in the English language ** Persians, the majority ethnic group in Iran, not to be conflated with the Iranic peoples ** Persian language, an Iranian language of the ...
Estakhri Abu Ishaq Ibrahim ibn Muhammad al-Farisi al-Istakhri () (also ''Estakhri'', , i.e. from the Iranian city of Istakhr, b. – d. 346 AH/AD 957) was a 10th-century travel author and Islamic geographer who wrote valuable accounts in Arabic of ...
reported windmills being operated in
Khorasan KhorasanDabeersiaghi, Commentary on Safarnâma-e Nâsir Khusraw, 6th Ed. Tehran, Zavvâr: 1375 (Solar Hijri Calendar) 235–236 (; , ) is a historical eastern region in the Iranian Plateau in West and Central Asia that encompasses western and no ...
(Eastern Iran and Western Afghanistan) already in the 9th century.Klaus Ferdinand, “The Horizontal Windmills of Western Afghanistan,” Folk 5, 1963, pp. 71–90..
Ahmad Y Hassan Ahmad Yousef Al-Hassan () (June 25, 1925 – April 28, 2012) was a Palestinian/Syrian/Canadian historian of Arabic and Islamic science and technology, educated in Jerusalem, Cairo, and London with a PhD in Mechanical engineering from University ...
,
Donald Routledge Hill Donald Routledge Hill (6 August 1922 – 30 May 1994)D. A. King, “In Memoriam: Donald Routledge Hill (1922-1994)”, ''Arabic Sciences and Philosophy,'' Volume 5 / Issue 02 / September 1995, pp 297-302 was a British engineer and historian of s ...
(1986). ''Islamic Technology: An illustrated history'', p. 54.
Cambridge University Press Cambridge University Press was the university press of the University of Cambridge. Granted a letters patent by King Henry VIII in 1534, it was the oldest university press in the world. Cambridge University Press merged with Cambridge Assessme ...
. .
Such windmills were in widespread use across the Middle East and Central Asia and later spread to Europe, China, and India from there.
Donald Routledge Hill Donald Routledge Hill (6 August 1922 – 30 May 1994)D. A. King, “In Memoriam: Donald Routledge Hill (1922-1994)”, ''Arabic Sciences and Philosophy,'' Volume 5 / Issue 02 / September 1995, pp 297-302 was a British engineer and historian of s ...
, "Mechanical Engineering in the Medieval Near East", ''Scientific American'', May 1991, p. 64–69. (cf.
Donald Routledge Hill Donald Routledge Hill (6 August 1922 – 30 May 1994)D. A. King, “In Memoriam: Donald Routledge Hill (1922-1994)”, ''Arabic Sciences and Philosophy,'' Volume 5 / Issue 02 / September 1995, pp 297-302 was a British engineer and historian of s ...

Mechanical Engineering
By the 11th century, the vertical-axle windmill had reached parts of Southern Europe, including the
Iberian Peninsula The Iberian Peninsula ( ), also known as Iberia, is a peninsula in south-western Europe. Mostly separated from the rest of the European landmass by the Pyrenees, it includes the territories of peninsular Spain and Continental Portugal, comprisin ...
(via
Al-Andalus Al-Andalus () was the Muslim-ruled area of the Iberian Peninsula. The name refers to the different Muslim states that controlled these territories at various times between 711 and 1492. At its greatest geographical extent, it occupied most o ...
) and the
Aegean Sea The Aegean Sea is an elongated embayment of the Mediterranean Sea between Europe and Asia. It is located between the Balkans and Anatolia, and covers an area of some . In the north, the Aegean is connected to the Marmara Sea, which in turn con ...
(in the
Balkans The Balkans ( , ), corresponding partially with the Balkan Peninsula, is a geographical area in southeastern Europe with various geographical and historical definitions. The region takes its name from the Balkan Mountains that stretch throug ...
). A similar type of horizontal windmill with rectangular blades, used for irrigation, can also be found in thirteenth-century China (during the
Jurchen Jin dynasty Jurchen may refer to: * Jurchen people, Tungusic people who inhabited the region of Manchuria until the 17th century ** Haixi Jurchens, a grouping of the Jurchens as identified by the Chinese of the Ming Dynasty ** Jianzhou Jurchens, a grouping of ...
in the north), introduced by the travels of
Yelü Chucai Yelü Chucai (; "Longbeard", written in Chinese characters as "", July 24, 1190 – June 20, 1244), courtesy name Jinqing (), was a Khitan statesman from the imperial clan of the Liao dynasty, who became a vigorous adviser and administrator of ...
to
Turkestan Turkestan,; ; ; ; also spelled Turkistan, is a historical region in Central Asia corresponding to the regions of Transoxiana and East Turkestan (Xinjiang). The region is located in the northwest of modern day China and to the northwest of its ...
in 1219. Needham, Joseph (1986). ''Science and Civilization in China: Volume 4, Physics and Physical Technology, Part 2, Mechanical Engineering''. Taipei: Caves Books Ltd., p. 560. Vertical-axle windmills were built, in small numbers, in Europe during the 18th and nineteenth centuries, for example Fowler's Mill at
Battersea Battersea is a large district in southwest London, part of the London Borough of Wandsworth, England. It is centred southwest of Charing Cross and also extends along the south bank of the Thames Tideway. It includes the Battersea Park. Hist ...
in London, and Hooper's Mill at
Margate Margate is a seaside resort, seaside town in the Thanet District of Kent, England. It is located on the north coast of Kent and covers an area of long, north-east of Canterbury and includes Cliftonville, Garlinge, Palm Bay, UK, Palm Bay and W ...
in
Kent Kent is a Ceremonial counties of England, ceremonial county in South East England. It is bordered by Essex across the Thames Estuary to the north, the Strait of Dover to the south-east, East Sussex to the south-west, Surrey to the west, and Gr ...
. These early modern examples seem not to have been directly influenced by the vertical-axle windmills of the medieval period, but to have been independent inventions by 18th-century engineers.


Vertical windmills

The horizontal-axis or vertical windmill (so called due to the plane of the movement of its sails) is a development of the 12th century, first used in northwestern Europe, in the triangle of northern
France France, officially the French Republic, is a country located primarily in Western Europe. Overseas France, Its overseas regions and territories include French Guiana in South America, Saint Pierre and Miquelon in the Atlantic Ocean#North Atlan ...
,
eastern England Eastern or Easterns may refer to: Transportation Airlines *China Eastern Airlines, a current Chinese airline based in Shanghai * Eastern Air, former name of Zambia Skyways *Eastern Air Lines, a defunct American airline that operated from 192 ...
and
Flanders Flanders ( or ; ) is the Dutch language, Dutch-speaking northern portion of Belgium and one of the communities, regions and language areas of Belgium. However, there are several overlapping definitions, including ones related to culture, la ...
. It is unclear whether the vertical windmill was influenced by the introduction of the horizontal windmill from Persia-Middle East to Southern Europe in the preceding century. The earliest certain reference to a windmill in
Northern Europe The northern region of Europe has several definitions. A restrictive definition may describe northern Europe as being roughly north of the southern coast of the Baltic Sea, which is about 54th parallel north, 54°N, or may be based on other ge ...
(assumed to have been of the vertical type) dates from 1185, in the former village of Weedley in Yorkshire which was located at the southern tip of the Wold overlooking the
Humber Estuary The Humber is a large tidal estuary on the east coast of Northern England. It is formed at Trent Falls, Faxfleet, by the confluence of the tidal rivers River Ouse, Yorkshire, Ouse and River Trent, Trent. From there to the North Sea, it forms ...
. Several earlier, but less certainly dated, 12th-century European sources referring to windmills have also been found.Lynn White Jr., ''Medieval technology and social change'' (Oxford, 1962) p. 87. These earliest mills were used to grind cereals.


Post mill

The evidence at present is that the earliest type of European windmill was the post mill, so named because of the large upright post on which the mill's main structure (the "body" or "buck") is balanced. By mounting the body this way, the mill can rotate to face the wind direction; an essential requirement for windmills to operate economically in north-western Europe, where wind directions are variable. The body contains all the milling machinery. The first post mills were of the sunken type, where the post was buried in an earth mound to support it. Later, a wooden support was developed called the trestle. This was often covered over or surrounded by a roundhouse to protect the trestle from the weather and to provide storage space. This type of windmill was the most common in Europe until the 19th century when more powerful
tower A tower is a tall Nonbuilding structure, structure, taller than it is wide, often by a significant factor. Towers are distinguished from guyed mast, masts by their lack of guy-wires and are therefore, along with tall buildings, self-supporting ...
and
smock mill The smock mill is a type of windmill that consists of a sloping, horizontally weatherboarded, thatched, or shingled tower, usually with six or eight sides. It is topped with a roof or cap that rotates to bring the sails into the wind. This t ...
s replaced them.


Hollow-post mill

In a hollow-post mill, the post on which the body is mounted is hollowed out, to accommodate the drive shaft. This makes it possible to drive machinery below or outside the body while still being able to rotate the body into the wind. Hollow-post mills driving scoop wheels were used in the Netherlands to drain wetlands since the early 15th century onwards.


Tower mill

By the end of the 13th century, the masonry tower mill, on which only the cap is rotated rather than the whole body of the mill, had been introduced. The spread of tower mills came with a growing economy that called for larger and more stable sources of power, though they were more expensive to build. In contrast to the post mill, only the cap of the tower mill needs to be turned into the wind, so the main structure can be made much taller, allowing the sails to be made longer, which enables them to provide useful work even in low winds. The cap can be turned into the wind either by winches or gearing inside the cap or from a winch on the tail pole outside the mill. A method of keeping the cap and sails into the wind automatically is by using a
fantail Fantails are small insectivorous songbirds of the genus ''Rhipidura'' in the family Rhipiduridae, native to Australasia, Southeast Asia and the Indian subcontinent. Most of the species are about long, specialist aerial feeders, and named as "f ...
, a small windmill mounted at right angles to the sails, at the rear of the windmill. These are also fitted to tail poles of post mills and are common in Great Britain and English-speaking countries of the former British Empire, Denmark, and Germany but rare in other places. Around some parts of the Mediterranean Sea, tower mills with fixed caps were built because the wind's direction varied little most of the time.


Smock mill

The smock mill is a later development of the tower mill, where the masonry tower is replaced by a wooden framework, called the "smock", which is thatched, boarded, or covered by other materials, such as
slate Slate is a fine-grained, foliated, homogeneous, metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade, regional metamorphism. It is the finest-grained foliated metamorphic ro ...
,
sheet metal Sheet metal is metal formed into thin, flat pieces, usually by an industrial process. Thicknesses can vary significantly; extremely thin sheets are considered foil (metal), foil or Metal leaf, leaf, and pieces thicker than 6 mm (0.25  ...
, or
tar paper Tar paper, roofing paper, felt paper, underlayment, or roofing tar paper is a heavy-duty paper used in construction. Tar paper is made by impregnating paper with tar, producing a waterproof material useful for roof construction. Tar paper is ...
. The smock is commonly of octagonal plan, though there are examples with different numbers of sides. Smock windmills were introduced by the Dutch in the 17th century to overcome the limitations of tower windmills, which were expensive to build and could not be erected on wet surfaces. The lower half of the smock windmill was made of brick, while the upper half was made of wood, with a sloping tower shape that added structural strength to the design. This made them lightweight and able to be erected on unstable ground. The smock windmill design included a small turbine in the back that helped the main mill to face the direction of the wind.


Mechanics


Sails

Common sails consist of a lattice framework on which the sailcloth is spread. The miller can adjust the amount of cloth spread according to the wind and the power needed. In medieval mills, the sailcloth was wound in and out of a ladder-type arrangement of sails. Later mill sails had a lattice framework over which the sailcloth was spread, while in colder climates, the cloth was replaced by wooden slats, which were easier to handle in freezing conditions. The jib sail is commonly found in Mediterranean countries and consists of a simple triangle of cloth wound round a spar. In all cases, the mill needs to be stopped to adjust the sails. Inventions in Great Britain in the late eighteenth and nineteenth centuries led to sails that automatically adjust to the wind speed without the need for the miller to intervene, culminating in patent sails invented by
William Cubitt Sir William Cubitt FRS (bapt. 9 October 1785 – 13 October 1861) was an English civil engineer and millwright. Born in Norfolk, England, he was employed in many of the great engineering undertakings of his time. He invented a type of windmil ...
in 1807. In these sails, the cloth is replaced by a mechanism of connected shutters. In France, Pierre-Théophile Berton invented a system consisting of longitudinal wooden slats connected by a mechanism that lets the miller open them while the mill is turning. In the twentieth century, increased knowledge of aerodynamics from the development of the airplane led to further improvements in efficiency by German engineer Bilau and several Dutch millwrights. The majority of windmills have four sails. Multiple-sailed mills, with five, six, or eight sails, were built in Great Britain (especially in and around the counties of
Lincolnshire Lincolnshire (), abbreviated ''Lincs'', is a Ceremonial counties of England, ceremonial county in the East Midlands and Yorkshire and the Humber regions of England. It is bordered by the East Riding of Yorkshire across the Humber estuary to th ...
and
Yorkshire Yorkshire ( ) is an area of Northern England which was History of Yorkshire, historically a county. Despite no longer being used for administration, Yorkshire retains a strong regional identity. The county was named after its county town, the ...
), Germany, and less commonly elsewhere. Earlier multiple-sailed mills are found in Spain, Portugal, Greece, parts of Romania, Bulgaria, and Russia. A mill with an even number of sails has the advantage of being able to run with a damaged sail by removing both the damaged sail and the one opposite, which does not unbalance the mill. In the Netherlands, the stationary position of the sails, i.e. when the mill is not working, has long been used to give signals. If the blades are stopped in a "+" sign (3-6-9-12 o'clock), the windmill is open for business. When the blades are stopped in an "X" configuration, the windmill is closed or not functional. A slight tilt of the sails (top blade at 1 o'clock) signals joy, such as the birth of a healthy baby. A tilt of the blades to 11-2-5-8 o'clock signals mourning, or warning. It was used to signal the local region during Nazi operations in
World War II World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
, such as searches for Jews. Across the Netherlands, windmills were placed in mourning positions in honor of the Dutch victims of the 2014 Malaysian Airlines Flight 17 shootdown.


Machinery

Gears inside a windmill convey power from the rotary motion of the sails to a mechanical device. The sails are carried on the horizontal windshaft. Windshafts can be wholly made of wood, wood with a cast iron pole end (where the sails are mounted), or entirely of cast iron. The brake wheel is fitted onto the windshaft between the front and rear bearings. It has the brake around the outside of the rim and teeth in the side of the rim which drives the horizontal gearwheel called wallower on the top end of the vertical upright shaft. In
grist mill A gristmill (also: grist mill, corn mill, flour mill, feed mill or feedmill) grinds cereal grain into flour and Wheat middlings, middlings. The term can refer to either the grinding mechanism or the building that holds it. Grist is grain that h ...
s, the great spur wheel, lower down the upright shaft, drives one or more stone nuts on the shafts driving each
millstone Millstones or mill stones are stones used in gristmills, used for triturating, crushing or, more specifically, grinding wheat or other grains. They are sometimes referred to as grindstones or grinding stones. Millstones come in pairs: a s ...
. Post mills sometimes have a head and/or tail wheel driving the stone nuts directly, instead of the spur gear arrangement. Additional gear wheels drive a sack hoist or other machinery. The machinery differs if the windmill is used for other applications than milling grain. A drainage mill uses another set of gear wheels on the bottom end of the upright shaft to drive a scoop wheel or
Archimedes' screw The Archimedes' screw, also known as the Archimedean screw, hydrodynamic screw, water screw or Egyptian screw, is one of the earliest documented hydraulic machines. It was so-named after the Greek mathematician Archimedes who first described it ...
.
Sawmill A sawmill (saw mill, saw-mill) or lumber mill is a facility where logging, logs are cut into lumber. Modern sawmills use a motorized saw to cut logs lengthwise to make long pieces, and crosswise to length depending on standard or custom sizes ...
s uses a crankshaft to provide a reciprocating motion to the saws. Windmills have been used to power many other industrial processes, including
papermill A paper mill is a factory devoted to making paper from vegetable fibres such as wood pulp, old rags, and other ingredients. Prior to the invention and adoption of the Fourdrinier machine and other types of paper machine that use an endless belt ...
s,
threshing Threshing or thrashing is the process of loosening the edible part of grain (or other crop) from the straw to which it is attached. It is the step in grain preparation after reaping. Threshing does not remove the bran from the grain. History of ...
mills, and to process oil seeds, wool, paints, and stone products.Gregory, R. The Industrial Windmill in Britain. Phillimore, 2005 File:Beebe Windmill Isometric of Machinery Long Island NY.jpg, An isometric drawing of the machinery of the
Beebe Windmill Beebe Windmill is a historic mill located at the southeast corner of Ocean Road and Hildreth Avenue in Bridgehampton, New York. an''Accompanying one photo from 1977''/ref> History Beebe windmill was built in 1820 at Sag Harbor for Lester Beebe. ...
File:MeophamGreen.svg, Diagram of the
smock mill The smock mill is a type of windmill that consists of a sloping, horizontally weatherboarded, thatched, or shingled tower, usually with six or eight sides. It is topped with a roof or cap that rotates to bring the sails into the wind. This t ...
at
Meopham Meopham is a large linear village and civil parish in the Gravesham, Borough of Gravesham in north-west Kent, England, lying to the south of Gravesend. The parish covers , and comprises two villages and two smaller settlements; it had a popula ...
,
Kent Kent is a Ceremonial counties of England, ceremonial county in South East England. It is bordered by Essex across the Thames Estuary to the north, the Strait of Dover to the south-east, East Sussex to the south-west, Surrey to the west, and Gr ...
File:Encyclopedie volume 1-040.png, Cross section of a post mill File:Molen d'Admiraal bovenwiel.jpg, Windshaft, brake wheel, and brake blocks in smock mill d'Admiraal in
Amsterdam Amsterdam ( , ; ; ) is the capital of the Netherlands, capital and Municipalities of the Netherlands, largest city of the Kingdom of the Netherlands. It has a population of 933,680 in June 2024 within the city proper, 1,457,018 in the City Re ...
File:Interior view Pantigo Windmill East Hampton Suffolk County New York(2).png, Interior view, Pantigo windmill,
East Hampton, New York East Hampton is a Administrative divisions of New York#Town, town in southeastern Suffolk County, New York United States. It is located at the eastern end of the South Shore (Long Island), South Shore of Long Island. It is the easternmost town i ...
Historic American Buildings Survey The asterisk ( ), from Late Latin , from Ancient Greek , , "little star", is a Typography, typographical symbol. It is so called because it resembles a conventional image of a star (heraldry), heraldic star. Computer scientists and Mathematici ...
File:Netherlands, Zoetermeer, wind mill, 1793.jpg, Technical drawing of a 1793 Dutch
smock mill The smock mill is a type of windmill that consists of a sloping, horizontally weatherboarded, thatched, or shingled tower, usually with six or eight sides. It is topped with a roof or cap that rotates to bring the sails into the wind. This t ...
for land drainage File:1813 Windmill.jpg, 1813 technical drawing


Spread and decline

In the 14th century, windmills became popular in Europe; the total number of wind-powered mills is estimated to have been around 200,000 at the peak in 1850, which is close to half of the some 500,000
water wheel A water wheel is a machine for converting the kinetic energy of flowing or falling water into useful forms of power, often in a watermill. A water wheel consists of a large wheel (usually constructed from wood or metal), with numerous b ...
s. Windmills were applied in regions where there was too little water, where rivers freeze in winter and in flat lands where the flow of the river was too slow to provide the required power. With the coming of the
Industrial Revolution The Industrial Revolution, sometimes divided into the First Industrial Revolution and Second Industrial Revolution, was a transitional period of the global economy toward more widespread, efficient and stable manufacturing processes, succee ...
, the importance of wind and water as primary industrial energy sources declined, and they were eventually replaced by steam (in
steam mill A steam mill is a type of Mill (grinding), grinding mill using a stationary steam engine to power its mechanism. * Albion Mills, Southwark, Albion Flour Mills, first steam mill in London from around 1790 * Aurora Steam Grist Mill, a historic gr ...
s) and
internal combustion An internal combustion engine (ICE or IC engine) is a heat engine in which the combustion of a fuel occurs with an oxidizer (usually air) in a combustion chamber that is an integral part of the working fluid flow circuit. In an internal comb ...
engines, although windmills continued to be built in large numbers until late in the nineteenth century. More recently, windmills have been preserved for their historic value, in some cases as static exhibits when the antique machinery is too fragile to be put in motion, and other cases as fully working mills.''Victorian Farm'', Episode 1. Directed and produced by Naomi Benson. BBC Television Of the 10,000 windmills in use in the Netherlands around 1850,Endedijk, L and others. Molens, De Nieuwe Stockhuyzen. Wanders. 2007. about 1,000 are still standing. Most of these are being run by volunteers, though some grist mills are still operating commercially. Many of the drainage mills have been appointed as a backup to the modern pumping stations. The Zaan district has been said to have been the first industrialized region of the world with around 600 operating wind-powered industries by the end of the eighteenth century. Economic fluctuations and the industrial revolution had a much greater impact on these industries than on grain and drainage mills, so only very few are left. Construction of mills spread to the
Cape Colony The Cape Colony (), also known as the Cape of Good Hope, was a British Empire, British colony in present-day South Africa named after the Cape of Good Hope. It existed from 1795 to 1802, and again from 1806 to 1910, when it united with three ...
in the seventeenth century. The early tower mills did not survive the gales of the
Cape Peninsula The Cape Peninsula () of South Africa is a generally mountainous peninsula that juts out into the Atlantic Ocean at the south-western extremity of the African continent. At the southern end of the peninsula are Cape Point and the Cape of Good ...
, so in 1717 the Heeren XVII sent carpenters, masons, and materials to construct a durable mill. The mill, completed in 1718, became known as the ''Oude Molen'' and was located between Pinelands Station and the Black River. Long since demolished, its name lives on as that of a Technical school in Pinelands. By 1863, Cape Town had 11 mills stretching from Paarden Eiland to Mowbray.


Specialized windmills


Wind turbines

A
wind turbine A wind turbine is a device that wind power, converts the kinetic energy of wind into electrical energy. , hundreds of thousands of list of most powerful wind turbines, large turbines, in installations known as wind farms, were generating over ...
is a windmill-like structure specifically developed to generate electricity. They can be seen as the next step in the development of the windmill. The first wind turbines were built by the end of the nineteenth century by James Blyth in
Scotland Scotland is a Countries of the United Kingdom, country that is part of the United Kingdom. It contains nearly one-third of the United Kingdom's land area, consisting of the northern part of the island of Great Britain and more than 790 adjac ...
(1887),
Charles F. Brush Charles Francis Brush (March 17, 1849June 15, 1929) was an American engineer, inventor, entrepreneur, and philanthropist. Biography Brush was born in Euclid Township, Ohio, to Isaac Elbert Brush and Delia Williams Phillips. Isaac Brush was a d ...
in
Cleveland, Ohio Cleveland is a city in the U.S. state of Ohio and the county seat of Cuyahoga County, Ohio, Cuyahoga County. Located along the southern shore of Lake Erie, it is situated across the Canada–United States border, Canada–U.S. maritime border ...
(1887–1888) and
Poul la Cour Poul la Cour (13 April 1846 – 24 April 1908) was a Denmark, Danish scientist, inventor and educationalist. Today la Cour is especially recognized for his early work on wind power, both experimental work on aerodynamics and practical implementat ...
in Denmark (1890s). La Cour's mill from 1896 later became the local power of the village of Askov. By 1908, there were 72 wind-driven electric generators in Denmark, ranging from 5 to 25 kW. By the 1930s, windmills were widely used to generate electricity on farms in the United States where distribution systems had not yet been installed, built by companies such as Jacobs Wind, Wincharger, Miller Airlite, Universal Aeroelectric, Paris-Dunn, Airline, and Winpower. The Dunlite Corporation produced turbines for similar locations in Australia. Forerunners of modern horizontal-axis utility-scale wind generators were the WIME-3D in service in
Balaklava Balaklava ( Ukrainian and , , ) is a settlement on the Crimean Peninsula and part of the city of Sevastopol. It is an administrative center of Balaklavsky District that used to be part of the Crimean Oblast before it was transferred to Sevast ...
,
USSR The Union of Soviet Socialist Republics. (USSR), commonly known as the Soviet Union, was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 until Dissolution of the Soviet ...
, from 1931 until 1942, a 100 kW generator on a tower, the
Smith–Putnam wind turbine The Smith–Putnam wind turbine was the world's first megawatt-size wind turbine. In 1941 it was connected to the local electrical distribution system on Grandpa's Knob in Castleton, Vermont, US. It was designed by Palmer Cosslett Putnam and ma ...
built in 1941 on the mountain known as Grandpa's Knob in
Castleton, Vermont Castleton is a town in Rutland County, Vermont, United States. Castleton is about to the west of Rutland, the county's seat and most populous city, and about east of the New York/Vermont state border. The town had a population of 4,458 at the ...
, United States, of 1.25 MW,The Return of Windpower to Grandpa's Knob and Rutland County
, Noble Environmental Power, LLC, 12 November 2007. Retrieved from Noblepower.com website 10 January 2010. Comment: this is the real nam
for the mountain
the turbine was built, in case you wondered.
and the NASA wind turbines developed from 1974 through the mid-1980s. The development of these 13 experimental wind turbines pioneered many of the
wind turbine design Wind turbine design is the process of defining the form and configuration of a wind turbine to extract energy from the wind. An installation consists of the systems needed to capture the wind's energy, point the turbine into the wind, convert ...
technologies in use today, including steel tube towers, variable-speed generators, composite blade materials, and partial-span pitch control, as well as aerodynamic, structural, and acoustic engineering design capabilities. The modern
wind power industry The wind power industry is involved with the design, manufacture, construction, and maintenance of wind turbines. The modern wind power industry began in 1979 with the serial production of wind turbines by Danish manufacturers. The industry is un ...
began in 1979 with the serial production of wind turbines by Danish manufacturers Kuriant,
Vestas Vestas Wind Systems A/S is a Danish manufacturer, seller, installer, and servicer of wind turbines that was founded in 1945. The company operates manufacturing plants in Denmark, Germany, the Netherlands, Taiwan, India, Italy, Romania, the Un ...
, Nordtank, and
Bonus Bonus commonly means: * Bonus, a Commonwealth term for a distribution of profits to a with-profits insurance policy * Bonus payment, an extra payment received as a reward for doing one's job well or as an incentive Bonus may also refer to: Place ...
. These early turbines were small by today's standards, with capacities of 20–30 kW each. Since then, commercial turbines have increased greatly in size, with the
Enercon E-126 The Enercon E-126 is an onshore wind turbine model manufactured by the German company Enercon. With a hub height of , rotor diameter of and a total height of , the turbine can generate up to of power, making it the largest wind turbine in the ...
capable of delivering up to 7 MW, while wind turbine production has expanded to many countries. As the 21st century began, rising concerns over
energy security Energy security is the association between national security and the availability of natural resources for energy consumption (as opposed to household energy insecurity). Access to cheaper energy has become essential to the functioning of modern ...
,
global warming Present-day climate change includes both global warming—the ongoing increase in global average temperature—and its wider effects on Earth's climate system. Climate change in a broader sense also includes previous long-term changes ...
, and eventual
fossil fuel depletion A fossil fuel is a flammable carbon compound- or hydrocarbon-containing material formed naturally in the Earth's crust from the buried remains of prehistoric organisms (animals, plants or microplanktons), a process that occurs within geologica ...
led to an expansion of interest in all available forms of
renewable energy Renewable energy (also called green energy) is energy made from renewable resource, renewable natural resources that are replenished on a human lifetime, human timescale. The most widely used renewable energy types are solar energy, wind pow ...
. Worldwide, many thousands of wind turbines are now operating, with a total
nameplate capacity Nameplate capacity, also known as the rated capacity, nominal capacity, installed capacity, maximum effect or gross capacity,Young's modulus Young's modulus (or the Young modulus) is a mechanical property of solid materials that measures the tensile or compressive stiffness when the force is applied lengthwise. It is the modulus of elasticity for tension or axial compression. Youn ...
and rho is the density. The best blade materials are
carbon fiber Carbon fiber-reinforced polymers (American English), carbon-fibre-reinforced polymers ( Commonwealth English), carbon-fiber-reinforced plastics, carbon-fiber reinforced-thermoplastic (CFRP, CRP, CFRTP), also known as carbon fiber, carbon comp ...
and
glass fiber Glass fiber ( or glass fibre) is a material consisting of numerous extremely fine fibers of glass. Glassmakers throughout history have experimented with glass fibers, but mass manufacture of glass fiber was only made possible with the inventio ...
reinforced
polymer A polymer () is a chemical substance, substance or material that consists of very large molecules, or macromolecules, that are constituted by many repeat unit, repeating subunits derived from one or more species of monomers. Due to their br ...
s ( CFRP and GFRP). Currently, GFRP materials are chosen for their lower cost, despite the much greater figure of merit of CFRP.


Recycling and waste problems with polymers blades

When the Vindeby Offshore Wind Farm was taken down in
Denmark Denmark is a Nordic countries, Nordic country in Northern Europe. It is the metropole and most populous constituent of the Kingdom of Denmark,, . also known as the Danish Realm, a constitutionally unitary state that includes the Autonomous a ...
in 2017, 99% of the not- degradable
fiberglass Fiberglass (American English) or fibreglass (English in the Commonwealth of Nations, Commonwealth English) is a common type of fibre-reinforced plastic, fiber-reinforced plastic using glass fiber. The fibers may be randomly arranged, flattened i ...
from 33 wind turbine blades ended as cut up at the Rærup Controlled
Landfill A landfill is a site for the disposal of waste materials. It is the oldest and most common form of waste disposal, although the systematic burial of waste with daily, intermediate and final covers only began in the 1940s. In the past, waste was ...
near
Aalborg Aalborg or Ålborg ( , , ) is Denmark's List of cities and towns in Denmark, fourth largest urban settlement (behind Copenhagen, Aarhus, and Odense) with a population of 119,862 (1 July 2022) in the town proper and an Urban area, urban populati ...
and in 2020, with considerably larger fiberglass quantities, even though it is the least environmentally friendly way of handling
waste Waste are unwanted or unusable materials. Waste is any substance discarded after primary use, or is worthless, defective and of no use. A by-product, by contrast is a joint product of relatively minor Value (economics), economic value. A wast ...
. Scrapped wind turbine blades are set to become a huge waste problem in Denmark and countries Denmark, to a greater and greater extent,
export An export in international trade is a good produced in one country that is sold into another country or a service provided in one country for a national or resident of another country. The seller of such goods or the service provider is a ...
its many produced wind turbines. "The reason why many wings end up in landfill is that they are incredibly difficult to separate from each other, which you will have to do if you hope to be able to
recycle ReCycle is a music loop editor designed and developed by Sweden, Swedish software developers Propellerhead Software. It runs on Microsoft Windows and Apple Macintosh based Personal Computer, PCs. The software debuted in 1994. The principal idea ...
the fiberglass", says Lykke Margot Ricard,
Associate Professor Associate professor is an academic title with two principal meanings: in the North American system and that of the ''Commonwealth system''. In the ''North American system'', used in the United States and many other countries, it is a position ...
in Innovation and Technological Foresight and education leader for civil engineering in Product Development and Innovation at the
University of Southern Denmark The University of Southern Denmark (, SDU) has campuses located in Southern Denmark and on Zealand. It offers a number of joint programmes in co-operation with the University of Flensburg and the University of Kiel. Contacts with regional indu ...
(SDU). According to Dakofa, the Danish Competence Center for Waste and Resources, there is nothing specific in the Danish waste order about how to handle discarded fiberglass. Several
scrap dealer Scrap consists of recyclable materials, usually metals, left over from product manufacturing and consumption, such as parts of vehicles, building supplies, and surplus materials. Unlike waste, scrap can have monetary value, especially recovere ...
s tell
Ingeniøren ''Ingeniøren'' (full name: ''Nyhedsmagasinet Ingeniøren'', literally ''The News Magazine "The Engineer"'') is a Danish weekly newspaper specialising in engineering topics. History and profile The paper has covered science and technology issues ...
that they have handled wind turbine blades (wings) that have been pulverized after being taken to a recycling station. One of them is the recycling company H.J. Hansen, where the
product manager A product manager (PM) is a professional role that is responsible for the development of products for an organization, known as the practice of product management. Product managers own the product strategy behind a product (physical or digital), ...
informed, that they have
transport Transport (in British English) or transportation (in American English) is the intentional Motion, movement of humans, animals, and cargo, goods from one location to another. Mode of transport, Modes of transport include aviation, air, land tr ...
ed approximately half of the wings they have received since 2012 to Reno Nord's landfill in Aalborg. A total of around 1,000 wings have ended up there, he estimates - and today up to 99 percent of the wings the company receives end up in a landfill. Since 1996, according to an estimate made by Lykke Margot Ricard ( SDU) in 2020, at least 8,810
tonne The tonne ( or ; symbol: t) is a unit of mass equal to 1,000  kilograms. It is a non-SI unit accepted for use with SI. It is also referred to as a metric ton in the United States to distinguish it from the non-metric units of the s ...
s of the wing
scrap Scrap consists of recyclable materials, usually metals, left over from product manufacturing and consumption, such as parts of vehicles, building supplies, and surplus materials. Unlike waste, scrap can have monetary value, especially recover ...
have been disposed of in Denmark, and the waste problem will grow significantly in the coming years when more and more wind turbines have reached their end of life. According to the SDU lecturer's calculations, the waste sector in Denmark will have to receive 46,400 tonnes of fiberglass from wind turbine blades over the next 20–25 years. As so, at the
island An island or isle is a piece of land, distinct from a continent, completely surrounded by water. There are continental islands, which were formed by being split from a continent by plate tectonics, and oceanic islands, which have never been ...
,
Lolland Lolland (; formerly spelled ''Laaland'', literally "low land") is the List of islands of Denmark#List of 100 largest Danish islands, fourth largest island of Denmark, with an area of . Located in the Kattegat, Belts and Sund area, it is part of Re ...
, in Denmark, 250 tonnes of fiberglass from wind turbine waste also pours up on a landfill at Gerringe in the middle of Lolland in 2020. In the
United States The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...
, worn-out wind turbine blades made of fiberglass go to the handful of landfills that accept them (e.g., in Lake Mills, Iowa;
Sioux Falls Sioux Falls ( ) is the most populous city in the U.S. state of South Dakota and the 117th-most populous city in the United States. It is the county seat of Minnehaha County and also extends into northern Lincoln County. The population was 192 ...
, South Dakota; Casper).


Windpumps

Windpumps were used to pump water since at least the 9th century in what is now
Afghanistan Afghanistan, officially the Islamic Emirate of Afghanistan, is a landlocked country located at the crossroads of Central Asia and South Asia. It is bordered by Pakistan to the Durand Line, east and south, Iran to the Afghanistan–Iran borde ...
,
Iran Iran, officially the Islamic Republic of Iran (IRI) and also known as Persia, is a country in West Asia. It borders Iraq to the west, Turkey, Azerbaijan, and Armenia to the northwest, the Caspian Sea to the north, Turkmenistan to the nort ...
, and
Pakistan Pakistan, officially the Islamic Republic of Pakistan, is a country in South Asia. It is the List of countries and dependencies by population, fifth-most populous country, with a population of over 241.5 million, having the Islam by country# ...
. The use of windpumps became widespread across the
Muslim world The terms Islamic world and Muslim world commonly refer to the Islamic community, which is also known as the Ummah. This consists of all those who adhere to the religious beliefs, politics, and laws of Islam or to societies in which Islam is ...
and later spread to
East Asia East Asia is a geocultural region of Asia. It includes China, Japan, Mongolia, North Korea, South Korea, and Taiwan, plus two special administrative regions of China, Hong Kong and Macau. The economies of Economy of China, China, Economy of Ja ...
(
China China, officially the People's Republic of China (PRC), is a country in East Asia. With population of China, a population exceeding 1.4 billion, it is the list of countries by population (United Nations), second-most populous country after ...
) and
South Asia South Asia is the southern Subregion#Asia, subregion of Asia that is defined in both geographical and Ethnicity, ethnic-Culture, cultural terms. South Asia, with a population of 2.04 billion, contains a quarter (25%) of the world's populatio ...
(
India India, officially the Republic of India, is a country in South Asia. It is the List of countries and dependencies by area, seventh-largest country by area; the List of countries by population (United Nations), most populous country since ...
). Windmills were later used extensively in Europe, particularly in the
Netherlands , Terminology of the Low Countries, informally Holland, is a country in Northwestern Europe, with Caribbean Netherlands, overseas territories in the Caribbean. It is the largest of the four constituent countries of the Kingdom of the Nether ...
and the
East Anglia East Anglia is an area of the East of England, often defined as including the counties of Norfolk, Suffolk and Cambridgeshire, with parts of Essex sometimes also included. The name derives from the Anglo-Saxon kingdom of the East Angles, ...
area of
Great Britain Great Britain is an island in the North Atlantic Ocean off the north-west coast of continental Europe, consisting of the countries England, Scotland, and Wales. With an area of , it is the largest of the British Isles, the List of European ...
, from the late
Middle Ages In the history of Europe, the Middle Ages or medieval period lasted approximately from the 5th to the late 15th centuries, similarly to the post-classical period of global history. It began with the fall of the Western Roman Empire and ...
onwards, to drain land for agricultural or building purposes. The "American windmill", or "wind engine", was invented by
Daniel Halladay Daniel Halladay (November 24, 1826 in Marlboro, Vermont – March 1, 1916 in Santa Ana, California) was an American engineer, inventor and businessman, best known for his innovative 1854 self-regulating farm wind pump at Ellington, Connectic ...
in 1854 and was used mostly for lifting water from wells. Larger versions were also used for tasks such as sawing wood, chopping hay, and shelling and grinding grain. In early California and some other states, the windmill was part of a self-contained domestic water system which included a hand-dug well and a wooden water tower supporting a redwood tank enclosed by wooden siding known as a
tankhouse A tankhouse (also spelled tank house or tank-house) is a water tower enclosed by siding (construction), siding. Tankhouses were part of a self-contained domestic water system supplying the house and garden, developed before the advent of electric ...
. During the late 19th century, steel blades and towers replaced wooden construction. At their peak in 1930, an estimated 600,000 units were in use. Firms such as U.S. Wind Engine and Pump Company, Challenge Wind Mill and Feed Mill Company, Appleton Manufacturing Company, Star,
Eclipse An eclipse is an astronomical event which occurs when an astronomical object or spacecraft is temporarily obscured, by passing into the shadow of another body or by having another body pass between it and the viewer. This alignment of three ...
,
Fairbanks-Morse Fairbanks, Morse and Company was an American manufacturing company in the late 19th and early 20th century. Founded in 1823 as a manufacturer of weighing scale, weighing scales, it later diversified into pumps, engines, windmills, coffee grinder ...
, Dempster Mill Manufacturing Company, and
Aermotor The Aermotor Windmill Company, or Aermotor Company, is an American manufacturer of wind-powered water pumps. The widespread use of their distinctive wind pumps on ranches throughout the arid plains and deserts of the United States has made their ...
became the main suppliers in North and South America. These windpumps are used extensively on farms and ranches in the United States, Canada, Southern Africa, and Australia. They feature a large number of blades, so they turn slowly with considerable
torque In physics and mechanics, torque is the rotational analogue of linear force. It is also referred to as the moment of force (also abbreviated to moment). The symbol for torque is typically \boldsymbol\tau, the lowercase Greek letter ''tau''. Wh ...
in low winds and are self-regulating in high winds. A tower-top
gearbox A transmission (also called a gearbox) is a mechanical device invented by Louis Renault (who founded Renault) which uses a gear set—two or more gears working together—to change the speed, direction of rotation, or torque multiplication/r ...
and
crankshaft A crankshaft is a mechanical component used in a reciprocating engine, piston engine to convert the reciprocating motion into rotational motion. The crankshaft is a rotating Shaft (mechanical engineering), shaft containing one or more crankpins, ...
convert the rotary motion into reciprocating strokes carried downward through a rod to the pump cylinder below. Such mills pumped water and powered feed mills, sawmills, and agricultural machinery. In Australia, the Griffiths Brothers at
Toowoomba Toowoomba ( ), nicknamed 'The Garden City' and 'T-Bar', is a city on the border of South East Queensland and Darling Downs regions of Queensland, Australia. It is located west of Queensland's capital, Brisbane. The urban population of Toowoom ...
manufactured windmills of the American pattern from 1876, with the trade name Southern Cross Windmills in use from 1903. These became an icon of the Australian rural sector by utilizing the water of the
Great Artesian Basin The Great Artesian Basin (GAB) of Australia is the largest and deepest artesian basin in the world, extending over . Measured water temperatures range from . The basin provides the only source of fresh water through much of inland Australia. ...
. Another well-known maker was Metters Ltd. of
Adelaide Adelaide ( , ; ) is the list of Australian capital cities, capital and most populous city of South Australia, as well as the list of cities in Australia by population, fifth-most populous city in Australia. The name "Adelaide" may refer to ei ...
,
Perth Perth () is the list of Australian capital cities, capital city of Western Australia. It is the list of cities in Australia by population, fourth-most-populous city in Australia, with a population of over 2.3 million within Greater Perth . The ...
and
Sydney Sydney is the capital city of the States and territories of Australia, state of New South Wales and the List of cities in Australia by population, most populous city in Australia. Located on Australia's east coast, the metropolis surrounds Syd ...
.


See also

* ''
Don Quixote , the full title being ''The Ingenious Gentleman Don Quixote of La Mancha'', is a Spanish novel by Miguel de Cervantes. Originally published in two parts in 1605 and 1615, the novel is considered a founding work of Western literature and is of ...
'' *
Éolienne Bollée The Éolienne Bollée is an Special wind turbines, unusual wind turbine, unique for having a Axial compressor, stator and a rotor, as a water turbine has. The eponymous invention was first patented in 1868 by Ernest Sylvain Bollée in France. A fu ...
*
History of wind power Wind power has been used as long as humans have put sailing ships, sails into the wind. Wind-powered machines used to grind grain and pump water — the windmill and wind pump — were developed in what is now Iran, Afghanistan, and Pakistan by ...
*
Horse mill A horse mill is a mill, sometimes used in conjunction with a watermill or windmill, that uses a horse engine as the power source. Any milling process can be powered in this way, but the most frequent use of animal power in horse mills was for gri ...
* List of windmills *
Mill (heraldry) Mills are sometimes used as a charge in heraldry, usually as a sign for agricultural or industrial endeavours. Examples File:Escudo de Viana de Jadraque (Guadalajara).svg, A water mill in the arms of Viana de Jadraque, Spain File:Säkylä.vaaku ...
* Molinology *
Sustainable energy Energy system, Energy is sustainability, sustainable if it "meets the needs of the present without compromising the ability of future generations to meet their own needs." Definitions of sustainable energy usually look at its effects on the e ...
*
Sustainable living Sustainable living describes a lifestyle (sociology), lifestyle that attempts to reduce the use of Earth's natural resources by an individual or society. Its practitioners often attempt to reduce their ecological footprint (including their carbo ...
*
Tide mill A tide mill is a water mill driven by tidal rise and fall. A dam with a sluice is created across a suitable tidal inlet, or a section of river estuary is made into a reservoir. As the tide comes in, it enters the mill pond through a one-way ga ...
*
Watermill A watermill or water mill is a mill that uses hydropower. It is a structure that uses a water wheel or water turbine to drive a mechanical process such as mill (grinding), milling (grinding), rolling, or hammering. Such processes are needed in ...
* Windmill ship


References


Further reading

* R. Gregory, The Industrial Windmill in Britain. Phillimore, 2005 * * Vowles, Hugh Pembroke: "An Enquiry into Origins of the Windmill", ''Journal of the Newcomen Society'', Vol. 11 (1930–31)


External links


Earth Science Australia, Wind Power and Windmills

The International Molinological Society

Windmills at Windmill World

Mill Database, Belgium and Netherlands

A Geograph article and photo-record of Windmills in Great Britain

The Mills Archive

Wind and watermill collections
at the
University of Kent The University of Kent (formerly the University of Kent at Canterbury, abbreviated as UKC) is a Collegiate university, collegiate public university, public research university based in Kent, United Kingdom. The university was granted its roya ...
{{Authority control 9th-century introductions Agricultural buildings Industrial buildings and structures Sustainable technologies Timber framed buildings Wind power