Fotothek df rp-d 0560014 Mockrehna-Langenreichenbach

The trestle of a

post mill The post mill is the earliest type of European windmill. Its defining feature is that the whole body of the mill that houses the machinery is mounted on a single vertical post, around which it can be turned to bring the sails into the wind. All p ...

is the arrangement of the ''main post'', ''crosstrees'' and ''quarterbars'' that form the substructure of this type of

windmill A windmill is a structure that converts wind power into rotational energy using vanes called windmill sail, sails or blades, specifically to mill (grinding), mill grain (gristmills), but the term is also extended to windpumps, wind turbines, and ...

. It may or may not be surrounded by a '' roundhouse''. Post mills without a roundhouse are known as ''open trestle post mills''. Boardmans Drainage Mill No 2

A trestle mill is a variety of

smock mill The smock mill is a type of windmill that consists of a sloping, horizontally weatherboarded, thatched, or shingled tower, usually with six or eight sides. It is topped with a roof or cap that rotates to bring the sails into the wind. This type ...

, usually without weatherboards, formerly used for drainage in the

Norfolk Broads Norfolk () is a ceremonial and non-metropolitan county in East Anglia in England. It borders Lincolnshire to the north-west, Cambridgeshire to the west and south-west, and Suffolk to the south. Its northern and eastern boundaries are the North ...

. Examples can be found at

Horning Horning is an ancient village and parish in the English county of Norfolk. It covers an area of 11 km2 and had a population of 1,033 in the 2001 census. Horning parish lies on the northern bank of the River Bure south of the River Thurne ...

Ludham Ludham is a village and civil parish in the English county of Norfolk, in the Norfolk Broads, at the end of a dyke leading to Womack Water and flowing into the River Thurne. It lies to the East of Ludham Bridge, which is on the River Ant. It cov ...

and

St Olaves St Olaves is a village in the English county of Norfolk. The village is situated on the River Waveney, south-west of the town of Great Yarmouth and the same distance north-west of the Suffolk town of Lowestoft. It is within The Broads nation ...

. A well preserved example of a timber crosstree, from the trestle of a medieval windmill, was excavated by archaeologists at Humberstone, near Leicester, in 2007.

References

;Sources * * * * {{Renewable-energy-stub Post mills Smock mills