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Title:
CONTRA-ROTATING PROPELLER PROPULSION-TYPE SHIP
Document Type and Number:
WIPO Patent Application WO/2014/030697
Kind Code:
A1
Abstract:
This ship is equipped with a main propeller (20), a pod propulsion device (30) steered by a steering mechanism (11), and a rudder (40) steered by a steering mechanism (12). The main propeller (20), the pod propulsion device (30) and the rudder (40) are arranged on the ship center line (C). The pod propulsion device (30) is provided with a casing (31), a pod propeller (33) and a strut (34). The pod propulsion device (30) is arranged aftward of the main propeller (20). The rudder (40) is arranged aftward of the strut (34). The main propeller (20) and the pod propeller (33) contra-rotate. When the rudder angle of both the pod propulsion device (30) and the rudder (40) is zero, at least a part of the front edge (41) of the rudder (40) is more forward than the back edge (31a) of the casing (31). By this means, during high-speed sailing and steering, the CRP (Contra Rotating Propeller) effect is maintained, and it is possible to suppress increased resistance due to a rudder provided in addition to the pod propulsion device.

Inventors:
MATSUMOTO DAISUKE (JP)
TAKEDA SHINGEN (JP)
UNSEKI TAKASHI (JP)
KUROIWA RYOTA (JP)
Application Number:
JP2013/072409
Publication Date:
February 27, 2014
Filing Date:
August 22, 2013
Export Citation:
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Assignee:
MITSUBISHI HEAVY IND LTD (JP)
International Classes:
B63H5/10; B63H5/07; B63H5/125; B63H25/38
Foreign References:
JPS6052198U1985-04-12
JP2006103490A2006-04-20
JP2004182096A2004-07-02
JP2005255127A2005-09-22
JP2005047305A2005-02-24
JP2003212189A2003-07-30
JP2006103490A2006-04-20
JP2004182096A2004-07-02
JP2003212189A2003-07-30
Other References:
See also references of EP 2873605A4
Attorney, Agent or Firm:
KUDOH Minoru (JP)
Minoru Kudo (JP)
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