Cornwerdermolen

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Cornwerdermolen
Cornwerd - De Cornwerdermolen.jpg
De Cornwerdermolen, September 2008
Origin
Mill nameDe Cornwerdermolen
Mill locationSotterruimerdijk 13, 8753 JA Cornwerd, Netherlands
Coordinates53°04′46″N 5°24′06″E / 53.07944°N 5.40167°E / 53.07944; 5.40167Coordinates: 53°04′46″N 5°24′06″E / 53.07944°N 5.40167°E / 53.07944; 5.40167
Operator(s)Wetterskip Fryslân
Year built1907
Information
PurposeDrainage mill
TypeSmock mill
StoreysThree-storey smock
Base storeysOne-storey base
Smock sidesEight sides
No. of sailsFour sails
Type of sailsPatent sails
WindshaftCast iron
WindingTailpole and winch
Type of pumpArchimedes' screw

The Cornwerdermolen is a smock mill in Cornwerd, Friesland, Netherlands which has been restored to working order. The mill is listed as Rijksmonument number 39329.[1]

History[]

The Cornwerdermolen was built in 1907 by millwright J H Westra of Franeker. The mill originally drained two polders, each via a separate Archimedes' screw.[2] Five windmills were put out of work by the construction of the Cornwerdermolen and were demolished.[3] The smaller of the two screws was later removed. The mill was restored in 1969.[2] it worked until 13 November 1972,[3] when it lost two sails in a storm. Thereafter the work of the mill was done by an Archimedes' screw driven by a tractor. The tractor was later replaced by an electric motor.[2] The mill was restored in 1999. It is the most westerly windmill in Friesland.[4]

Description[]

For an explanation of the various items of machinery, see Mill machinery.

The Cornwerdermolen is a "grondzeiler", a three-storey smock mill on a single-storey base. There is no stage, the sails reaching almost to the ground. The mill is winded by tailpole and winch. The four Patent sails, which have a span of 20.00 metres (65 ft 7 in), are carried in a cast-iron windshaft which was cast by H J Koning, , Groningen in 1907. The mill in winded by a tailpole and winch. The windshaft also carries the brake wheel which has 59 cogs. This drives the wallower (34 cogs) at the top of the upright shaft. At the bottom of the upright shaft, the crown wheel (103 cogs) drives the Archimedes' screw via a gearwheel with 37 cogs. The axle of the Archimedes' screw is 715 millimetres (2 ft 4 in) diameter and the Archimedes' screw is 1.52 metres (5 ft 0 in) diameter. It is 4.63 metres (15 ft 2 in) long, inclined at 19½°. Each turn of the screw lifts 1,147 litres (252 imp gal) of water.[2]

Public access[]

The Cornwerdermolen is open to the public by appointment.[5]

References[]

  1. ^ "Technische gegevens" (in Dutch). De Hollandsche Molen. Archived from the original on 27 May 2012. Retrieved 2 January 2010. (Click on Technische gegevens" to view.)
  2. ^ a b c d Stichting De Fryske Mole (1995). Friese Molens (in Dutch). Leeuwarden: Friese Pers Boekerij bv. p. 207. ISBN 90-330-1522-6.
  3. ^ a b "Cornwerd, Friesland" (in Dutch). Molendatabase. Retrieved 2 January 2010.
  4. ^ "Geschiedenis" (in Dutch). De Hollandsche Molen. Archived from the original on 27 May 2012. Retrieved 2 January 2010. (Click on Geschiedenis" to view.)
  5. ^ "Informatie" (in Dutch). De Hollandsche Molen. Archived from the original on 27 May 2012. Retrieved 2 January 2010. (Click on "Informatie" to view.)
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