Lilley, G. M.Rainbird, W. J.2013-06-202013-06-201956-04http://dspace.lib.cranfield.ac.uk/handle/1826/7971A preliminary study is made of the theoretical gain in power output obtained with a fully ducted land-land type windmill is compared with the standard unshrouded type windmill. ...enA preliminary report on the design and performance of ducted windmillsReport