Ypey Mole is a smock mill in

Ryptsjerk Ryptsjerk ( nl, Rijperkerk) is a village in Tytsjerksteradiel municipality in the province of Friesland, the Netherlands. It had a population of around 767 in January 2017. There is a restored windmill A windmill is a structure that converts ...

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 ...

which was built in 1911. The mill has been restored to working order. It is listed as a Rijksmonument.

History

''Ypey Mole'' was originally built in 1858 at Zwartewegsend, where it was in use until the Autumn of 1958 when the sails were damaged. The mill was restored in 1959 by millwright De Roos of

Leeuwarden Leeuwarden (; fy, Ljouwert, longname=yes /; Stadsfries dialects, Town Frisian: ''Liwwadden''; Leeuwarder dialect: ''Leewarden'') is a List of cities in the Netherlands by province, city and Municipalities of the Netherlands, municipality in Fri ...

, Friesland. In November 1970, the mill was set on fire by some children. The fire brigade was able to prevent the mill being destroyed. The mill was moved to its current site in 1981 and restored by millwright Tacoma of

Stiens Stiens is a town in the municipality of Leeuwarden, Netherlands. As of January 2017, the town has a population of about 7,545. Between 1944 and 2018, it was the capital of the municipality of Leeuwarderadeel. History The village was first mentione ...

, Friesland. ''Ypey Mole'' was sold to

Stichting De Fryske Mole The Stichting De Fryske Mole ( en, Frisian Mills Foundation) is a foundation for the preservation of windmills in the Dutch province Friesland, owning 42 of the 124 windmills in Friesland and closely co-operating with the Gild Fryske Mounders with w ...

on 10 May 1982, the 31st mill acquired by that organisation. The mill is listed as a Rijksmonument, №35687.

Description

''Ypey Mole'' is what the Dutch describe as a ''Grondzeiler''. It is a two 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

thatch Thatching is the craft of building a roof with dry vegetation such as straw, water reed, sedge (''Cladium mariscus''), rushes, heather, or palm branches, layering the vegetation so as to shed water away from the inner roof. Since the bulk of ...

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

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 impur ...

''windshaft''. The ''windshaft'' carries the ''brake wheel'' which has 50 cogs. This drives the ''wallower'' (31 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 41 cogs drives an

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 ...

via a ''crown wheel''. The lower ''crown wheel'', which has 35 cogs is carried on the axle of an Archimedes' screw, which is used to drain the polder. The axle of the screw is diameter . The screw is diameter. It is inclined at 23°. Each revolution of the screw lifts of water.

Public access

''Ypey Mole'' is open to the public by appointment.

References

{{Dutch Windmills Windmills in Friesland Windmills completed in 1981 Smock mills in the Netherlands Windpumps in the Netherlands Agricultural buildings in the Netherlands Rijksmonuments in Friesland Octagonal buildings in the Netherlands