Ybema's molen is a

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 type ...

Workum Workum () is a city located in the municipality of Súdwest-Fryslân in Friesland, Netherlands. It received city rights in 1399 and is one of the eleven cities of Friesland. It had a population of 4,435 in January 2017.Friesland Friesland (, ; official fry, Fryslân ), historically and traditionally known as Frisia, is a province of the Netherlands located in the country's northern part. It is situated west of Groningen, northwest of Drenthe and Overijssel, north of ...

Netherlands ) , anthem = ( en, "William of Nassau") , image_map = , map_caption = , subdivision_type = Sovereign state , subdivision_name = Kingdom of the Netherlands , established_title = Before independence , established_date = Spanish Netherl ...

. It has been restored to working order. Designated as being held in reserve, it is listed as a

Rijksmonument A rijksmonument (, ) is a national heritage site of the Netherlands, listed by the agency Rijksdienst voor het Cultureel Erfgoed (RCE) acting for the Dutch Ministry of Education, Culture and Science. At the end of February 2015, the Netherlands ...

History

''Ybemas molen'' was built in 1899. It worked by wind until 1951 but was derelict by 1955 when it was restored by carpenter F de Groot of

Ferwoude Ferwoude ( fry, Ferwâlde) is a village in Súdwest-Fryslân municipality in the province of Friesland, the Netherlands. It had a population of around 235 in January 2017. History The village was first mentioned in the 13th century as Forwalda, an ...

, Friesland at a cost of ƒ4,130.38. In August 1963, the mill was bought by the Gemeente Nijefurd for ƒ1. Further restorations were carried out in 1969 and 1981. In 1986, the mill was sold to the Molenstichting Nijefurd. By 1995, the

Archimedes' screw The Archimedes screw, also known as the Archimedean screw, hydrodynamic screw, water screw or Egyptian screw, is one of the earliest hydraulic machines. Using Archimedes screws as water pumps (Archimedes screw pump (ASP) or screw pump) dates back ...

had been removed. In 2006, the mill was fully restored. A new

cast iron Cast iron is a class of iron–carbon alloys with a carbon content more than 2%. Its usefulness derives from its relatively low melting temperature. The alloy constituents affect its color when fractured: white cast iron has carbide impuriti ...

windshaft was fitted, replacing the previous wooden one. A new Archimedes screw was fitted and the mill made workable again. The mill was designated by Wetterskip Fryslân as being held in reserve. A sail broke on 27 November 2011. A replacement pair of sails was fitted in November 2012. The mill is listed as a Rijksmonument, №39517.

Description

''Ybemas molen'' is what the Dutch describe as a ''Grondzeiler''. It is a single storey smock mill on a single storey base. There is no stage, the sails reaching almost to ground level. The mill is winded by tailpole and winch. The smock and cap are boarded. The sails are

Common sails Common may refer to: Places * Common, a townland in County Tyrone, Northern Ireland * Boston Common, a central public park in Boston, Massachusetts * Cambridge Common, common land area in Cambridge, Massachusetts * Clapham Common, originally com ...

. They have a span of . The sails are carried on a

''windshaft''. The ''windshaft'' carries the ''brake wheel'' which has 31 cogs. This drives the ''wallower'' (16 cogs) at the top of the ''upright shaft''. At the bottom of the ''upright shaft'' there are two ''crown wheels''. The upper ''crown wheel'', which has 32 cogs drives an

via a ''crown wheel''. The lower ''crown wheel'', which has 31 cogs is carried on the axle of the Archimedes' screw. The screw is diameter.

Public access

''Ybemas molen'' is open by appointment.

References

{{Dutch Windmills Windmills in Friesland Windmills completed in 1899 Smock mills in the Netherlands Windpumps in the Netherlands Agricultural buildings in the Netherlands Rijksmonuments in Friesland Octagonal buildings in the Netherlands