Title:
RUDDER APPARATUS FOR STERN FIN EQUIPPED VESSEL
Document Type and Number:
Japanese Patent JP2018062329
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To improve propulsion performance by providing a rudder apparatus with a twist applied in a rudder portion in an area lower than a propeller shaft core of a vessel in the vessel equipped with a stern fin with an energy saving device for a vessel.SOLUTION: A rudder 14 with a stern fin arranged ahead of a propeller 4 and also in the rear, a twist is applied broadside where a propeller wing is lowered in advancing in a portion ahead of a stern perpendicular line AP in a lower area from a propeller shaft height position, and a rudder is arranged having size of the twist maximum in a position at propeller shaft core SL height, becoming smaller as going lower and zero at a bottom end, and at the same time having a cross-sectional shape with the opposite broadside applied with the twist in a projecting curve and the same broadside formed approximately linear. In the rudder, the propulsion performance is improved and propeller efficiency is advanced by having resistance reduced and lifting force generated by having gyration flow of the propeller hit the rudder in a lower area than height of the propeller shaft core SL.SELECTED DRAWING: Figure 2
More Like This:
| JPS5525646 | STEERING DEVICE FOR SMALL BOAT |
| JPH02151596 | RUDDER FOR TWO-SHAFT TWO-RUDDER SHIP |
Inventors:
IKEDA TSUTOMU
SHINOHARA HIDEJI
SHINOHARA HIDEJI
Application Number:
JP2016214680A
Publication Date:
April 19, 2018
Filing Date:
October 13, 2016
Export Citation:
Assignee:
YAMAKAWA ZOSEN TEKKO KK
IKEDA TSUTOMU
IKEDA TSUTOMU
International Classes:
B63H25/38; B63H5/16
Domestic Patent References:
| JP2013126849A | 2013-06-27 | |||
| JPH02144296A | 1990-06-04 | |||
| JPS6127798U | 1986-02-19 | |||
| JPS577798A | 1982-01-14 | |||
| JPS61102394A | 1986-05-21 |
Foreign References:
| US2331706A | 1943-10-12 |