Editing Windmill (section)

==== Hollow-post mill ====

In a hollow-post mill, the post on which the body is mounted is hollowed out, to accommodate the drive shaft.<ref>{{cite book
 | title = Windmills
 | author = Martin Watts
 | publisher = Osprey Publishing
 | year = 2006
 | isbn = 978-0-7478-0653-0
 | page = 55
 | url = https://books.google.com/books?id=PJ7-M8lFo_UC&pg=PA55
 }}{{Dead link|date=April 2023 |bot=InternetArchiveBot |fix-attempted=yes }}</ref>
This makes it possible to drive machinery below or outside the body while still being able to rotate the body into the wind. Hollow-post mills driving scoop wheels were used in the Netherlands to drain wetlands since the early 15th century onwards.<ref name="hollow-postMills">{{Britannica URL | url=https://www.britannica.com/technology/energy-conversion/Windmills | title=Windmills | author= Rex Wailes, Fred Landis }}</ref>