(19)
(11) EP 2 110 311 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
05.10.2011 Bulletin 2011/40

(43) Date of publication A2:
21.10.2009 Bulletin 2009/43

(21) Application number: 09152042.9

(22) Date of filing: 04.02.2009
(51) International Patent Classification (IPC): 
B63H 25/38(2006.01)
 B63H 25/52(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR
Designated Extension States:
AL BA RS

(30) Priority: 18.04.2008 JP 2008109270

(71) Applicant: Mitsubishi Heavy Industries, Ltd.
Tokyo 108-8215 (JP)

(72) Inventors:
  • Matsumoto, Daisuke Mitsubishi Heavy Industries Ltd.
    Nagasaki Nagasaki 851-0392 (JP)
  • Sakamoto, Toshinobu Mitsubishi Heavy Industries Ltd.
    Nagasaki Nagasaki 851-0392 (JP)

(74) Representative: Henkel, Breuer & Partner 
Patentanwälte Maximiliansplatz 21
80333 München
80333 München (DE)

   


(54) Finned rudder


(57) A fin that generates thrust in the forward motion direction by utilizing rising, falling, and swirling flows near a rudder surface is attached to a rudder to improve the propulsion performance. The invention provides a finned rudder, disposed aftward of a screw propeller that rotates clockwise as viewed from the stern side during forward motion, for changing the course of a ship and provided with a first fin and a second fin in respective rudder surfaces. A first end of the first fin is attached at a position higher than a center position of the screw propeller on a leading edge side of a central portion of the rudder surface, and a first end of the second fin is attached at a position lower than the center position of the screw propeller on the leading edge side of the central portion of the rudder surface. A second end of the first fin extends at an upward inclination to a position inside the rotation radius of the screw propeller where the upward flow is strong, and a second end of the second fin extends horizontally to a position inside the rotation radius of the screw propeller where the downward flow is strong.







Search report