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De Hempenserpoldermolen, Wergea
De Hempenserpoldermolen, Wergea
	De Hempenserpoldermolen, January 1970.
Origin
Mill name	De Hempenserpoldermolen
Mill location	Achter Hempensermeer, Wergea
Coordinates	53°10′03″N 5°50′28″E / 53.16750°N 5.84111°E
Operator(s)	Molenstichting Boarnsterheim
Year built	1863
Information
Purpose	Drainage mill
Type	Smock mill
Storeys	Two storey smock
Base storeys	One storey base
Smock sides	Eight sides
No. of sails	Four sails
Type of sails	Common sails
Windshaft	Cast iron
Winding	Tailpole and winch
Auxiliary power	Electric motor, formerly a diesel engine
Type of pump	Archimedes' screw

De Hempenserpoldermolen is a smock mill in Wergea, Friesland, Netherlands which was built in 1863 and has been restored to working order. It is listed as a Rijksmonument.

History

De Hempenserpoldermolen was built in 1863 to drain the Hempensermeerpolder.^[1] There had been a mill on the site since 1784.^[2] The mill worked by wind alone until 1955. A Brons diesel engine had been placed in the mill in 1953. In 1955, the mill was offered for sale and demolition, contrary to a directive requiring it to be kept in working order. The Provincial Executive refused permission for the mill's demolition and suggested that the municipality took over the mill. On 30 December 1959, the water board sold the mill to the municipality Boarnsterhim for ƒ2. A condition of the sale was that the diesel engine remained in the mill. The mill was restored in 1983 by millwright Tacoma of Stiens, Friesland. The diesel engine was replaced by an electric motor in 1986.^[1] The mill was sold to the Molenstichting Boarnsterheim in 2010. It is listed as a Rijksmonument, №34603.^[3]

Description

De Hempenserpoldermolen 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 thatched. The sails are Common sails.^[1] They have a span of 23.80 metres (78 ft 1 in).^[3] The sails are carried on a cast iron windshaft, which was cast by Gietijzerij De Prins van Oranje, The Hague in 1889. The windshaft carries the brake wheel which has 60 cogs. This drives the wallower (30 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 36 cogs drives an Archimedes' screw via a crown wheel. The lower crown wheel, which has 37 cogs is carried on the axle of an Archimedes' screw, which is used to drain the polder. The axle of the screw is 40 centimetres (1 ft 4 in) diameter and 5.80 metres (19 ft 0 in) long. The screw is 90 centimetres (2 ft 11 in) diameter. It is inclined at 29.5°. Each revolution of the screw lifts 180 litres (40 imp gal) of water.^[1]

Public access

De Hempenserpoldermolen is open whenever the mill is working by wind,^[3] or by appointment.^[4]

References

Dutch Rijksmonument 34603

^ ^a ^b ^c ^d Stichting De Fryske Mole (1995). Friese Molens (in Dutch). Leeuwarden: Friese Pers Boekerij bv. p. 187. ISBN 90 330 1522 6.
^ "Hempensermeerpolder (1e), Wergea/ Warga" (in Dutch). Molendatabase. Retrieved 29 September 2014.
^ ^a ^b ^c "Wergea (Warga), Fryslân" (in Dutch). Molendatabase. Retrieved 29 September 2014.
^ "De Hempenserpoldermolen te Wergea (Warga), Contact" (in Dutch). De Hollandsche Molen. Archived from the original on 6 October 2014. Retrieved 29 September 2014.