Gin gang
Encyclopedia
A gin gang, wheelhouse, roundhouse or horse−engine house, is a structure built to enclose a horse mill
Horse mill
A horse mill is a mill that uses a horse 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 grinding grain and pumping water. Other animals used for powering mills include dogs, donkeys and oxen. Engines powered by...

, usually circular but sometimes square or octagonal, attached to a threshing
Threshing
Threshing is the process of loosening the edible part of cereal grain from the scaly, inedible chaff that surrounds it. It is the step in grain preparation after harvesting and before winnowing, which separates the loosened chaff from the grain...

 barn. Most were built in England
England
England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental...

 in the late 18th and early 19th centuries. The threshing barn held a small threshing machine
Threshing machine
The thrashing machine, or, in modern spelling, threshing machine , was a machine first invented by Scottish mechanical engineer Andrew Meikle for use in agriculture. It was invented for the separation of grain from stalks and husks. For thousands of years, grain was separated by hand with flails,...

 which was connected to the gin gang via wooden gear
Gear
A gear is a rotating machine part having cut teeth, or cogs, which mesh with another toothed part in order to transmit torque. Two or more gears working in tandem are called a transmission and can produce a mechanical advantage through a gear ratio and thus may be considered a simple machine....

s, drive shafts and drive belt
Belt (mechanical)
A belt is a loop of flexible material used to link two or more rotating shafts mechanically. Belts may be used as a source of motion, to transmit power efficiently, or to track relative movement. Belts are looped over pulleys. In a two pulley system, the belt can either drive the pulleys in the...

, and was powered by a horse which walked round and round inside the gin gang.

Operation and structure

The gin (short for "engine") was the horse mill
Horse mill
A horse mill is a mill that uses a horse 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 grinding grain and pumping water. Other animals used for powering mills include dogs, donkeys and oxen. Engines powered by...

 driving a small threshing machine
Threshing machine
The thrashing machine, or, in modern spelling, threshing machine , was a machine first invented by Scottish mechanical engineer Andrew Meikle for use in agriculture. It was invented for the separation of grain from stalks and husks. For thousands of years, grain was separated by hand with flails,...

, and the horse did the gang, or going. The gin gang was always attached to the main threshing barn, where the gin was situated. It was almost always of one storey and it could be circular, polygonal or square. There was a hole for a drive−shaft or drive−belt, linking it with the threshing barn. The gin was connected by cogs
Gear
A gear is a rotating machine part having cut teeth, or cogs, which mesh with another toothed part in order to transmit torque. Two or more gears working in tandem are called a transmission and can produce a mechanical advantage through a gear ratio and thus may be considered a simple machine....

 to a vertical spindle. The spindle was connected to a horizontal arrangement including a shaft attached to a horse, which turned the spindle and powered the machine by ganging or walking round and round the cogs and vertical spindle inside the walls of the gin gang. This arrangement was necessary in locations where there was no power for a water wheel
Water wheel
A water wheel is a machine for converting the energy of free-flowing or falling water into useful forms of power. A water wheel consists of a large wooden or metal wheel, with a number of blades or buckets arranged on the outside rim forming the driving surface...

, hence in Wales
Wales
Wales is a country that is part of the United Kingdom and the island of Great Britain, bordered by England to its east and the Atlantic Ocean and Irish Sea to its west. It has a population of three million, and a total area of 20,779 km²...

 and Ireland there is evidence of fewer gin gangs.
Gin gangs were not usually thatched
Thatching
Thatching is the craft of building a roof with dry vegetation such as straw, water reed, sedge , rushes, or heather, layering the vegetation so as to shed water away from the inner roof. It is a very old roofing method and has been used in both tropical and temperate climates...

 but were stone−flagged
Flagstone
Flagstone, is a generic flat stone, usually used for paving slabs or walkways, patios, fences and roofing. It may be used for memorials, headstones, facades and other constructions. The name derives from Middle English flagge meaning turf, perhaps from Old Norse flaga meaning slab.Flagstone is a...

, tiled or pantiled, possibly because the gin damaged potential thatching straw. Its structure tended to reflect locally available materials and hence local vernacular building
Vernacular architecture
Vernacular architecture is a term used to categorize methods of construction which use locally available resources and traditions to address local needs and circumstances. Vernacular architecture tends to evolve over time to reflect the environmental, cultural and historical context in which it...

 style, because railways had not generally distributed brick and slate. Building materials include thatch in Sussex
Sussex
Sussex , from the Old English Sūþsēaxe , is an historic county in South East England corresponding roughly in area to the ancient Kingdom of Sussex. It is bounded on the north by Surrey, east by Kent, south by the English Channel, and west by Hampshire, and is divided for local government into West...

, pantiles in North Yorkshire, stone tiles
Flagstone
Flagstone, is a generic flat stone, usually used for paving slabs or walkways, patios, fences and roofing. It may be used for memorials, headstones, facades and other constructions. The name derives from Middle English flagge meaning turf, perhaps from Old Norse flaga meaning slab.Flagstone is a...

 and sandstone
Sandstone
Sandstone is a sedimentary rock composed mainly of sand-sized minerals or rock grains.Most sandstone is composed of quartz and/or feldspar because these are the most common minerals in the Earth's crust. Like sand, sandstone may be any colour, but the most common colours are tan, brown, yellow,...

 in Northumberland, granite
Granite
Granite is a common and widely occurring type of intrusive, felsic, igneous rock. Granite usually has a medium- to coarse-grained texture. Occasionally some individual crystals are larger than the groundmass, in which case the texture is known as porphyritic. A granitic rock with a porphyritic...

 pillars in Devon, wooden poles and flint
Flint
Flint is a hard, sedimentary cryptocrystalline form of the mineral quartz, categorized as a variety of chert. It occurs chiefly as nodules and masses in sedimentary rocks, such as chalks and limestones. Inside the nodule, flint is usually dark grey, black, green, white, or brown in colour, and...

 in Norfolk
Norfolk
Norfolk is a low-lying county in the East of England. It has borders with Lincolnshire to the west, Cambridgeshire to the west and southwest and Suffolk to the south. Its northern and eastern boundaries are the North Sea coast and to the north-west the county is bordered by The Wash. The county...

, weatherboarding
Weatherboarding
Weatherboarding is the cladding or ‘siding’ of a house consisting of long thin timber boards that overlap one another, either vertically or horizontally on the outside of the wall. They are usually of rectangular section with parallel sides...

 in Berkshire
Berkshire
Berkshire is a historic county in the South of England. It is also often referred to as the Royal County of Berkshire because of the presence of the royal residence of Windsor Castle in the county; this usage, which dates to the 19th century at least, was recognised by the Queen in 1957, and...

, brick in the East Riding of Yorkshire
East Riding of Yorkshire
The East Riding of Yorkshire, or simply East Yorkshire, is a local government district with unitary authority status, and a ceremonial county of England. For ceremonial purposes the county also includes the city of Kingston upon Hull, which is a separate unitary authority...

, white magnesian limestone
Dolostone
Dolostone or dolomite rock is a sedimentary carbonate rock that contains a high percentage of the mineral dolomite. In old U.S.G.S. publications it was referred to as magnesian limestone. Most dolostone formed as a magnesium replacement of limestone or lime mud prior to lithification. It is...

 in West Yorkshire
West Yorkshire
West Yorkshire is a metropolitan county within the Yorkshire and the Humber region of England with a population of 2.2 million. West Yorkshire came into existence as a metropolitan county in 1974 after the passage of the Local Government Act 1972....

, ironstone
Ironstone
Ironstone is a sedimentary rock, either deposited directly as a ferruginous sediment or created by chemical repacement, that contains a substantial proportion of an iron compound from which iron either can be or once was smelted commercially. This term is customarily restricted to hard coarsely...

 in Bedfordshire
Bedfordshire
Bedfordshire is a ceremonial county of historic origin in England that forms part of the East of England region.It borders Cambridgeshire to the north-east, Northamptonshire to the north, Buckinghamshire to the west and Hertfordshire to the south-east....

, and one instance of hexagonal ashlar
Ashlar
Ashlar is prepared stone work of any type of stone. Masonry using such stones laid in parallel courses is known as ashlar masonry, whereas masonry using irregularly shaped stones is known as rubble masonry. Ashlar blocks are rectangular cuboid blocks that are masonry sculpted to have square edges...

 pillars salvaged from Finchale Priory
Finchale Priory
Finchale Priory was a 13th century Benedictine priory. The remains are sited by the River Wear, four miles from Durham. It is a Grade I listed building.-Current Situation:...

 in Finchale, County Durham. Gin gangs were required to shelter the wooden gears, and not to protect the horse; hence in some places there is evidence of horse−walks or open−air horse−powered threshing machines instead. The horse in the gin gang could also power machinery outdoors.

History and distribution

Local names for covered gin gangs were covered gin−house, covered horse−walk, enginehouse, gin−case, gin−gan, gin−gang, gin−house, gin−race, horse−gear, horse−mill, round−house, track−shed, four−wheelhouse, wheel−rig, wheel−shade and wheel−shed. These are not to be confused with the uncovered ones which were called gin−circle, ginnyring, horse−course, horse−gang, horse−path, horse−track and horse−walk. In Scotland, Wales, and Warwickshire a gin gang was commonly called a horse engine house.

In 1976, 1,300 gin gangs were identified in Great Britain
Great Britain
Great Britain or Britain is an island situated to the northwest of Continental Europe. It is the ninth largest island in the world, and the largest European island, as well as the largest of the British Isles...

, and a few others in Ireland
Ireland
Ireland is an island to the northwest of continental Europe. It is the third-largest island in Europe and the twentieth-largest island on Earth...

, Denmark
Denmark
Denmark is a Scandinavian country in Northern Europe. The countries of Denmark and Greenland, as well as the Faroe Islands, constitute the Kingdom of Denmark . It is the southernmost of the Nordic countries, southwest of Sweden and south of Norway, and bordered to the south by Germany. Denmark...

, the Netherlands
Netherlands
The Netherlands is a constituent country of the Kingdom of the Netherlands, located mainly in North-West Europe and with several islands in the Caribbean. Mainland Netherlands borders the North Sea to the north and west, Belgium to the south, and Germany to the east, and shares maritime borders...

, and East Germany. Most gin gangs were built from around 1785 to 1851, peaking in 1800 to 1830. The most recent ones were built in the Isle of Wight
Isle of Wight
The Isle of Wight is a county and the largest island of England, located in the English Channel, on average about 2–4 miles off the south coast of the county of Hampshire, separated from the mainland by a strait called the Solent...

 and Cornwall
Cornwall
Cornwall is a unitary authority and ceremonial county of England, within the United Kingdom. It is bordered to the north and west by the Celtic Sea, to the south by the English Channel, and to the east by the county of Devon, over the River Tamar. Cornwall has a population of , and covers an area of...

 from 1845 to 1868. In the 19th century there were 575 gin gangs in Northumberland and 227 in West Cumberland, but between the 1890s and the 1960s, hundreds of these were destroyed. In the 1970s, 276 survived in Northumberland and 200 in County Durham. In the same decade a survey found most remaining gin gangs were in the north−east and south−west of England, and it was suggested that this distribution could have been affected by the 1830 Swing Riots
Swing Riots
The Swing Riots were a widespread uprising by agricultural workers; it began with the destruction of threshing machines in the Elham Valley area of East Kent in the summer of 1830, and by early December had spread throughout the whole of southern England and East Anglia.As well as the attacks on...

 which destroyed most threshing machines in the south−east of England. As a result of this, in the 1970s Scotland
Scotland
Scotland is a country that is part of the United Kingdom. Occupying the northern third of the island of Great Britain, it shares a border with England to the south and is bounded by the North Sea to the east, the Atlantic Ocean to the north and west, and the North Channel and Irish Sea to the...

 still had 150 gin gangs, North East England
North East England
North East England is one of the nine official regions of England. It covers Northumberland, County Durham, Tyne and Wear, and Teesside . The only cities in the region are Durham, Newcastle upon Tyne and Sunderland...

 had 800 and Cornwall had 100 remaining, but Wiltshire
Wiltshire
Wiltshire is a ceremonial county in South West England. It is landlocked and borders the counties of Dorset, Somerset, Hampshire, Gloucestershire, Oxfordshire and Berkshire. It contains the unitary authority of Swindon and covers...

 and Berkshire
Berkshire
Berkshire is a historic county in the South of England. It is also often referred to as the Royal County of Berkshire because of the presence of the royal residence of Windsor Castle in the county; this usage, which dates to the 19th century at least, was recognised by the Queen in 1957, and...

 had 8 between them. Conversely, the Napoleonic Wars
Napoleonic Wars
The Napoleonic Wars were a series of wars declared against Napoleon's French Empire by opposing coalitions that ran from 1803 to 1815. As a continuation of the wars sparked by the French Revolution of 1789, they revolutionised European armies and played out on an unprecedented scale, mainly due to...

 of 1803 to 1815 created a dearth of labour and a corresponding demand for gin gangs in Cornwall, Devon
Devon
Devon is a large county in southwestern England. The county is sometimes referred to as Devonshire, although the term is rarely used inside the county itself as the county has never been officially "shired", it often indicates a traditional or historical context.The county shares borders with...

, and Dorset
Dorset
Dorset , is a county in South West England on the English Channel coast. The county town is Dorchester which is situated in the south. The Hampshire towns of Bournemouth and Christchurch joined the county with the reorganisation of local government in 1974...

. The truly portable horse engine
Portable engine
A portable engine is a small steam engine, mounted on wheels or skids, which is used for driving machinery using a belt from its flywheel. It is not self-propelled and is towed to the work site by horses or bullocks, or even a traction engine. Portable engines were used mainly for driving...

 was invented around 1840; this obviated the necessity for building further gin gangs.

Existing gin gangs

No gin gang remains in operation commercially; the known examples outside museums are either derelict or have been renovated as barn conversions.

Remnant or derelict

The surviving Low Walworth
Low Walworth
Low Walworth is a hamlet in County Durham, England, to the north−west of the edge of Darlington. It consists of Low Walworth Hall, Low Walworth Farm and their respective cottages, flats and outbuildings. Several of these buildings are listed, and date from the 17th to the 19th century...

 gin gang was built around the late 18th century. In Northumberland
Northumberland
Northumberland is the northernmost ceremonial county and a unitary district in North East England. For Eurostat purposes Northumberland is a NUTS 3 region and is one of three boroughs or unitary districts that comprise the "Northumberland and Tyne and Wear" NUTS 2 region...

 examples exist in Harlow Hill, Hepple
Hepple
Hepple is a small village and parish in rural Northumberland, west of Rothbury, which provides most of its local services. It is on the edge of the Northumberland National Park, and lies on the bank of the river Coquet, at a location which was on the Coquet Stop Line, of which a pillbox remains...

, Redesmouth
Redesmouth
Redesmouth is a village in Northumberland, England, just over to the south-east of Bellingham.- Governance : is in the parliamentary constituency of Hexham.- Transport :...

 and Stanton
Stanton, Northumberland
 Stanton is a small hamlet in Northumberland, England which is located north west of Morpeth, and north of Newcastle-Upon-Tyne. Stanton is surrounded by scenic countryside, and is only from the Northumberland National Park ....

. In North Yorkshire
North Yorkshire
North Yorkshire is a non-metropolitan or shire county located in the Yorkshire and the Humber region of England, and a ceremonial county primarily in that region but partly in North East England. Created in 1974 by the Local Government Act 1972 it covers an area of , making it the largest...

 two remain at Burn Bridge
Burn Bridge
Burn Bridge is a village in the borough of Harrogate in North Yorkshire, England.Burn Bridge is set largely on the side of a hill. The small river Crimple Beck runs through the lower area...

 and Stapleton
Stapleton, Richmondshire
Stapleton is a village and civil parish in the Richmondshire district of North Yorkshire, England. It is close to the River Tees and Darlington. A pub and restaurant, The Bridge Inn, serves exotic meats such as kangaroo and crocodile....

 (see Commons link below). Scottish examples survive at St Quivox, South Ayrshire
South Ayrshire
South Ayrshire is one of 32 council areas of Scotland, covering the southern part of Ayrshire. It borders onto East Ayrshire, North Ayrshire and Dumfries and Galloway....

, at Dunbar
Dunbar
Dunbar is a town in East Lothian on the southeast coast of Scotland, approximately 28 miles east of Edinburgh and 28 miles from the English Border at Berwick-upon-Tweed....

, East Lothian
East Lothian
East Lothian is one of the 32 council areas of Scotland, and a lieutenancy Area. It borders the City of Edinburgh, Scottish Borders and Midlothian. Its administrative centre is Haddington, although its largest town is Musselburgh....

, and at Carsegour, Kinross
Kinross
Kinross is a burgh in Perth and Kinross, Scotland. It was formerly the county town of Kinross-shire.Kinross is a fairly small town, with some attractive buildings...

, but the one at Westruther, Westertown in Berwickshire
Berwickshire
Berwickshire or the County of Berwick is a registration county, a committee area of the Scottish Borders Council, and a lieutenancy area of Scotland, on the border with England. The town after which it is named—Berwick-upon-Tweed—was lost by Scotland to England in 1482...

 appears to have been destroyed since 1974. The site of a former gin gang exists at Kildinny steading at Forteviot
Forteviot
Forteviot is a village in Strathearn, Scotland on the south bank of the River Earn between Dunning and Perth. It lies in the council area of Perth and Kinross...

 in Strathearn
Strathearn
Strathearn or Strath Earn is the strath of the River Earn, in Scotland. It extends from Loch Earn in Perth and Kinross to the River Tay....

, Scotland. However quite a few do survive in Perth and Kinross
Perth and Kinross
Perth and Kinross is one of 32 council areas in Scotland, and a Lieutenancy Area. It borders onto the Aberdeenshire, Angus, Dundee City, Fife, Clackmannanshire, Stirling, Argyll and Bute and Highland council areas. Perth is the administrative centre...

, and there is one at Tresness Farm on Sanday
Sanday, Orkney
Sanday is one of the inhabited islands in the Orkney Islands, off the north coast of Scotland. With an area of , it is the third largest of the Orkney Islands. The main centres of population are Lady Village and Kettletoft. Sanday can be reached by Orkney Ferries or plane from Kirkwall on the...

 in Orkney. There is a listed gin gang at The Grange farmhouse at Muggleswick
Muggleswick
Muggleswick is a village and civil parish in County Durham, England. It is situated a few miles to the west of Consett.The village has a number of farms and domestic dwellings as well as the Church of England church, generally accepted as dedicated to All Saints, and village hall . Amenities other...

 in County Durham, and there used to be one in 1979 at Holbeck farmhouse in Barrow-in-Furness
Barrow-in-Furness
Barrow-in-Furness is an industrial town and seaport which forms about half the territory of the wider Borough of Barrow-in-Furness in the county of Cumbria, England. It lies north of Liverpool, northwest of Manchester and southwest from the county town of Carlisle...

. There is an example at Nettlecombe
Nettlecombe, Somerset
Nettlecombe is a civil parish in the English county of Somerset. The parish covers a rural area below the Brendon Hills, comprising the small hamlets of Woodford, Yarde and Torre together with more isolated individual farms and homes...

 in Somerset
Somerset
The ceremonial and non-metropolitan county of Somerset in South West England borders Bristol and Gloucestershire to the north, Wiltshire to the east, Dorset to the south-east, and Devon to the south-west. It is partly bounded to the north and west by the Bristol Channel and the estuary of the...

. There is an extant gin gang at Ystum Colwyn Farm, Meifod
Meifod
Meifod is a small village 7 miles north-west of Welshpool in Powys, mid Wales, on the A495 road and located in the valley of the River Vyrnwy. The River Banwy has a confluence with the Vyrnwy approximately two miles to the west of the village....

, in Wales
Wales
Wales is a country that is part of the United Kingdom and the island of Great Britain, bordered by England to its east and the Atlantic Ocean and Irish Sea to its west. It has a population of three million, and a total area of 20,779 km²...

. The Beamish Museum
Beamish Museum
Beamish, The North of England Open Air Museum is an open-air museum located at Beamish, near the town of Stanley, County Durham, England. The museum's guiding principle is to preserve an example of everyday life in urban and rural North East England at the climax of industrialisation in the early...

 in County Durham contains a restored gin gang. Another has been preserved at Weald and Downland Open Air Museum
Weald and Downland Open Air Museum
The Weald and Downland Open Air Museum is an open air museum at in Singleton, Sussex, England. The museum covers , with nearly 50 historic buildings dating from the thirteenth to nineteenth centuries, along with gardens, farm animals, walks and a lake....

 but is now labelled as a horse whim
Horse mill
A horse mill is a mill that uses a horse 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 grinding grain and pumping water. Other animals used for powering mills include dogs, donkeys and oxen. Engines powered by...

 for raising water, as is the one at Brewers' House Museum in Antwerp.

Barn conversions

In Chopwell
Chopwell
Chopwell is a village in Tyne and Wear, located approximately three miles west of Rowlands Gill and one mile north of Hamsterley.Traditionally an area of coal mining, Chopwell was nicknamed "Little Moscow" because of the strong support for the Communist Party...

 in Tyne and Wear
Tyne and Wear
Tyne and Wear is a metropolitan county in north east England around the mouths of the Rivers Tyne and Wear. It came into existence as a metropolitan county in 1974 after the passage of the Local Government Act 1972...

 a gin gang is part of a barn conversion
Conversion (barn)
The Conversion of Barns involves the conversion of old farming barns to commercial or residential use structures. Many older farm buildings are being converted for holiday use...

. Another one was renovated to become holiday cottage
Holiday cottage
A holiday cottage is a cottage used for accommodation, which has become common in the United Kingdom and Canada. They are typically small homes that vacationers can rent and run as if it were their own home for the duration of their stay. This gives them the freedom to eat in, eat out, stay in bed...

s in the face of local controversy at Lanchester, County Durham
Lanchester, County Durham
Lanchester is a village and civil parish in County Durham, England, and was in the former district of Derwentside . It is to the west of the city of Durham and from the former steel town of Consett, and has a population of slightly over 4,000 people.Although there was a small drift mine on the...

. A barn conversion development
Real estate development
Real estate development, or Property Development, is a multifaceted business, encompassing activities that range from the renovation and re-lease of existing buildings to the purchase of raw land and the sale of improved land or parcels to others...

, from a group of farm buildings known as a steading
Homestead (buildings)
A homestead is either a single building, or collection of buildings grouped together on a large agricultural holding, such as a ranch, station or a large agricultural operation of some other designation.-See also:* Farm house* Homestead Act...

including an octagonal gin gang, was completed in 2010 at Longhorsley
Longhorsley
Longhorsley is a village in Northumberland, England about northwest of Morpeth, and about south of Alnwick. The A697 road passes through the village linking it with Morpeth, Wooler and Coldstream in Scotland. There are 6 "Streets" in Longhorsley: Whitegates, Church View, Drummonds Close, West...

, Northumberland. Another example survives as a barn conversion at Southstoke
Southstoke
Southstoke is a small village and civil parish in north east Somerset, England. In 2004 the parish council requested that the name be formally changed to South Stoke, as "this is historically the more established spelling and better reflects the origin and meaning of the Parish name."It is south...

, Somerset
Somerset
The ceremonial and non-metropolitan county of Somerset in South West England borders Bristol and Gloucestershire to the north, Wiltshire to the east, Dorset to the south-east, and Devon to the south-west. It is partly bounded to the north and west by the Bristol Channel and the estuary of the...

.

Building

Home Farm at the Beamish Museum
Beamish Museum
Beamish, The North of England Open Air Museum is an open-air museum located at Beamish, near the town of Stanley, County Durham, England. The museum's guiding principle is to preserve an example of everyday life in urban and rural North East England at the climax of industrialisation in the early...

, County Durham
County Durham
County Durham is a ceremonial county and unitary district in north east England. The county town is Durham. The largest settlement in the ceremonial county is the town of Darlington...

, contains an early 19th century, semi-octagonal gin gang with sandstone or millstone grit walls and slate roof. The renovated internal roof structure is based on a traditional space frame truss with its primary plane in line with the tie beam
Joist
A joist, in architecture and engineering, is one of the horizontal supporting members that run from wall to wall, wall to beam, or beam to beam to support a ceiling, roof, or floor. It may be made of wood, steel, or concrete. Typically, a beam is bigger than, and is thus distinguished from, a joist...

 (or joist), and with members fixed between king post
King post
A king post is a central vertical supporting post used in architectural, bridge, or aircraft design applications.-Architecture:...

 and rafter
Rafter
A rafter is one of a series of sloped structural members , that extend from the ridge or hip to the downslope perimeter or eave, designed to support the roof deck and its associated loads.-Design:...

s to support the semi-octagonal plan of the roof. There is one main transverse oak tie beam on which the king post of the main truss is based. The king post is in tension to prevent sagging of the horizontal tie beam, so neither the king post nor the tie beam are resting on the mill
Horse mill
A horse mill is a mill that uses a horse 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 grinding grain and pumping water. Other animals used for powering mills include dogs, donkeys and oxen. Engines powered by...

 below. The roof construction is not structurally dependent on the horse mill, or connected with it.


Horse mill

The Beamish gin gang and its in−situ horse mill
Horse mill
A horse mill is a mill that uses a horse 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 grinding grain and pumping water. Other animals used for powering mills include dogs, donkeys and oxen. Engines powered by...

 have not been used since the 1830s when portable engine
Portable engine
A portable engine is a small steam engine, mounted on wheels or skids, which is used for driving machinery using a belt from its flywheel. It is not self-propelled and is towed to the work site by horses or bullocks, or even a traction engine. Portable engines were used mainly for driving...

s superseded it. The gin gang survived because its original mill was removed and it was converted for other uses. The present mill was brought by the museum from Berwick Mills Low Farm in Northumberland
Northumberland
Northumberland is the northernmost ceremonial county and a unitary district in North East England. For Eurostat purposes Northumberland is a NUTS 3 region and is one of three boroughs or unitary districts that comprise the "Northumberland and Tyne and Wear" NUTS 2 region...

. The museum has repaired and installed it as a museum exhibit, but it is not currently fit for purpose. The top of the mill's
Horse mill
A horse mill is a mill that uses a horse 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 grinding grain and pumping water. Other animals used for powering mills include dogs, donkeys and oxen. Engines powered by...

 main vertical axle
Axle
An axle is a central shaft for a rotating wheel or gear. On wheeled vehicles, the axle may be fixed to the wheels, rotating with them, or fixed to its surroundings, with the wheels rotating around the axle. In the former case, bearings or bushings are provided at the mounting points where the axle...

 and the end of the main drive shaft are pivoted at the centre of their own separate tie beam
Joist
A joist, in architecture and engineering, is one of the horizontal supporting members that run from wall to wall, wall to beam, or beam to beam to support a ceiling, roof, or floor. It may be made of wood, steel, or concrete. Typically, a beam is bigger than, and is thus distinguished from, a joist...

, which is below and parallel with the main roof tie beam and set in the gin gang's side walls at either end. The mill's tie beam has to be stabilised with two massive oak beams which run, either side of the drive shaft, from tie beam to barn wall. A large and basic engine like this can create great stresses from the torque
Torque
Torque, moment or moment of force , is the tendency of a force to rotate an object about an axis, fulcrum, or pivot. Just as a force is a push or a pull, a torque can be thought of as a twist....

engendered.

External links

The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
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