Buckau, later Baden-Baden, idea by Anton Flettner, reason: to substitute sails with rotors..
see cilinder ships (http://images.google.com/imgres?imgurl=http://openlearn.open.ac.uk/file.php/3317/T307_1_025bi.jpg&imgrefurl=http://openlearn.open.ac.uk/mod/resource/view.php%3Fid%3D254231&usg=__pApSHNV6zrTaDttj4LvYIaTRUD4=&h=322&w=424&sz=39&hl=en&start=28&tbnid=5hxb69nKXjg7BM:&tbnh=96&tbnw=126&prev=/images%3Fq%3Dturbosail%26start%3D21%26gbv%3D2%26ndsp%3D21%26hl%3Den%26sa%3DN)