BIAXIAL STERN CATAMARAN SHIP

WIPO Patent Application WO/2010/140357

A1

Propulsive performance for a ship is improved by effective use of flows generated in rear of skegs when the ship is propelled. A biaxial stern catamaran ship (1) provided with two propellers is provided with propelling means (210, 220) which propel the biaxial stern catamaran ship by driving the two propellers and the two skegs (11, 12) which are provided at the body of the biaxial stern catamaran ship. The centers of the drive shafts of the two propellers are respectively positioned with offset from the center axes of the two skegs. Each of the skegs is twisted in an S-shape so as to change the flow naturally generated toward the rear of the skegs while the ship sails into a rotational flow, and a lot of the generated rotational flows are caught as a counter flow by the blade surface of the propeller positioned at an optimal position.

SASAKI NORIYUKI (JP)
HIRATA NOBUYUKI (JP)
FUJISAWA JUNICHI (JP)
KISHIMOTO MASAHIRO (JP)
TSUJIMOTO MASARU (JP)
KUME KENICHI (JP)
KAWANAMI YASUTAKA (JP)
KURODA MARIKO (JP)
HASEGAWA JUN (JP)

PCT/JP2010/003682

December 09, 2010

June 02, 2010

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NAT MARITIME RES INST (JP)
SASAKI NORIYUKI (JP)
HIRATA NOBUYUKI (JP)
FUJISAWA JUNICHI (JP)
KISHIMOTO MASAHIRO (JP)
TSUJIMOTO MASARU (JP)
KUME KENICHI (JP)
KAWANAMI YASUTAKA (JP)
KURODA MARIKO (JP)
HASEGAWA JUN (JP)

B63B1/08; B63B9/00; B63H5/08; B63H5/125; B63H5/16; B63H23/10

JP2007223557A	2007-09-06
JPH0446799B2	1992-07-31
JPS60166590A	1985-08-29
JP2005517589A	2005-06-16
JPH09142384A	1997-06-03
JPH06135377A	1994-05-17
JP2004189122A	2004-07-08
JPS4730083U	1972-12-05

ABE, Shinichi et al. (JP)
Shin-ichi Abe (JP)

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