Tony Pick's 3D Sussex is a series of free addon scenery models for
Microsoft Flight Simulator 2002 and 2004. The series started with Jack and Jill windmills, Clayton, and has grown to include
Chailey windmill.
The Sussex mills website has
more info on the series, including
a selection of images showing the mills as they appear as you fly around them.
Flight Simulator scenery featuring Sussex windmills