Why are so few windmills equipped with tail fans?
The tail fan, invented in Britain by Edmund Lee in 1745, is used to automatically wind the cap without any action by the miller. While this was seen as a great convenience to some millers, the tail fan was never a popular design feature in Holland, where millers preferred to have manual control over the direction of the sails. One reason, they claimed, was that the tail fan would turn the sails into the wind of a powerful storm.
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