The tide mill of Birlot is a tide mill located on the island of Bréhat in Brittany. Its specificity lies in the supply of sea water of the mechanism. It does not work directly with the current tide which will activate the wheel , but nevertheless uses it to fill the pond which serves as a water reserve. In fact, the mill can not turn if the wheel is submerged, the inertia is too great. However, when the sea is sufficiently deep (mid-tide in the case of Birlot), the paddle wheel of the mill can be supplied with water through a valve that releases the necessary flow from the water supply.
The mill may run six hours as the tide goes back further 3 hours and 3 hours to reach the wheel. However, this can take place twice every 24 hours, as needed. The value of a mill sea or tide over a windmill or a river is that the energy is constant and predictable (a mill river may run out of water and a windmill suffer too much wind or not enough). This mill was built from 1633 to 1638 by the Duke of Penthievre , Lord of Bréhat. Major work was completed in 1744 , bears the date lintel of the door bent . He produced the flour until 1920 and then about his roof of thatchwas gradually degraded. A roof cement to two parts replaced it but will not withstand the storm of 1987 . The common Brehat bought the mill in 1990 and makes the first backup job of the walls. The Association of Birlot mill was established in 1994 to raise funds and manage the restoration. The roof, doors, windows and floors are made of 1994, thanks to the patronage of the Swiss Insurance Group Suravenir ( Crédit Mutuel de Bretagne ).Since then, the wheel turns, the mechanism was constructed and implemented and the mill grinds buckwheat regularly for demonstration.
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