De Grote Molen, Marrum

De Grote Molen (English: The Great Mill) is a smock mill in Marrum, Friesland, Netherlands which was built in 1845. The mill has been restored to working order. It is listed as a Rijksmonument, number 15637.[1]

De Grote Molen, Marrum
De Grote Molen, August 2007.
Origin
Mill nameDe Grote Molen
Mill locationLjouwerterdyk 1, 9073 LP Marrum
Coordinates53.3183°N 5.7967°E / 53.3183; 5.7967
Operator(s)Stichting De Fryske Mole
Year built1845
Information
PurposeDrainage mill
TypeSmock mill
StoreysTwo-storey smock
Base storeysSingle-storey base
No. of sailsFour sails
Type of sailsCommon sails, leading edges on the Fok System
WindshaftCast iron
WindingTailpole and winch
Auxiliary powerElectric motor
Type of pumpArchimedes' screw

History

De Grote Molen was built by millwright J T Kingma of Ternaard in 1845 to drain the 2,100 pondemaat (770 ha; 1,900 acres) Marrum-Westernijtjerk polder.[2] As built, the mill was fitted with Patent sails. Later, Common sails fitted with streamlined leading edges on the Dekker System were fitted. These were later replaced by Common sails with leading edges on the Fok System.[3]

The mill was restored in 1957-58, 1965, and again in 1968. On 4 May 1976, the mill was sold to Stichting De Fryske Mole (English: Frisian Mills Foundation). A further restoration was undertaken in 1978-78. Auxiliary power is from an EMF Dordt electric motor.[3]

Description

De Grote Molen 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, fitted with leading edges on the Fok system.[3] They have a span of 22.80 metres (74 ft 10 in).[4] The sails are carried on a cast-iron windshaft. which was cast by Prins van Oranje, 's Gravenhage, Zuid Holland in 1868. The windshaft also carries the brake wheel which has 65 cogs. This drives the wallower (33 cogs) at the top of the upright shaft. At the bottom of the upright shaft the crown wheel, which has 49 cogs drives a gearwheel with 45 cogs on the axle of the Archimedes' screw. The axle of the Archimedes' screw is 655 millimetres (2 ft 2 in) diameter. The screw is 1.72 metres (5 ft 8 in) diameter and 2.02 metres (6 ft 8 in) long. It is inclined at 19°. Each revolution of the screw lifts 1,744 litres (384 imp gal) of water.[3]

Public access

De Grote Molen is open to the public by appointment.[5]

gollark: Oh, I got the direction wrong. Still valid.
gollark: Well, balancers are symmetric maybe.
gollark: 4 to 8 balancers are entirely valid.
gollark: Also, that's just a balancer, not very accursed.
gollark: * cuprous apiosystem

References
  1. "De Grote Molen te Marrum, Technische gegevens" (in Dutch). De Hollandsche Molen. Archived from the original on 6 June 2012. Retrieved 18 May 2010.
  2. "De De Grote Molen te Marrum, Geschiedenis" (in Dutch). De Hollandsche Molen. Archived from the original on 6 June 2012. Retrieved 18 May 2010.
  3. Stichting De Fryske Mole (1995). Friese Molens (in Dutch). Leeuwarden: Friese Pers Boekerij bv. pp. 136, 259. ISBN 90-330-1522-6.
  4. "Marrum, Fryslân" (in Dutch). Molendatabase. Retrieved 15 May 2010.
  5. "De Grote Molen te Marrum, Informatie" (in Dutch). De Hollandsche Molen. Archived from the original on 6 June 2012. Retrieved 18 May 2010.
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