TQ3013 : Jill windmill, Clayton - patent sails

taken 13 years ago, near to Clayton, West Sussex, Great Britain

Jill windmill, Clayton - patent sails
Jill windmill, Clayton - patent sails
A close up of the centre of the sails. There are four patent sails and the shutters are opened and closed by bell cranks attached to the 'spider' on the end of the striking rod that traverses the windshaft. When the mill is working a weight is hung on chains attached to a mechanism at the opposite end of the striking rod and the weight determines how strong a wind can blow before the sails open and 'spill' it. This provides a mechanism to prevent the mill going too fast. The fan tail (not seen) keeps the sails into the wind. Being tailwinded (ie the wind coming from behind) can wreck a mill as the sails can actually lift the windshaft forward and out of the mill.
Jack & Jill Windmills

Clayton Windmills, known locally as Jack and Jill, stand on the South Downs above the village of Clayton, West Sussex. They comprise a post mill and a tower mill, and the roundhouse of a former post mill. All three are Grade II* listed buildings.

Jill Windmill, built in 1821 in Brighton and moved to its present site in 1852 is open to the public most Sundays whilst Jack Windmill, built in 1866, is privately owned,
LinkExternal link

Post Mills

There are three main types of windmills found within Great Britain. Post mills, smock mills and tower mills.

The post mill is of a timber framed construction with weather-boarded sloping external walls. It was manually positioned by hand to face the wind, unlike the smock and tower mills which had pivoting top with a tail fan.

Windmill article Link

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TQ3013, 185 images   (more nearby search)
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Date Taken
Friday, 17 July, 2009   (more nearby)
Friday, 24 January, 2014
Geographical Context
Historic sites and artefacts 
Subject Location
OSGB36: geotagged! TQ 303 133 [100m precision]
WGS84: 50:54.3171N 0:8.8835W
Camera Location
OSGB36: geotagged! TQ 303 133
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