All-speed-range propeller having stern fins
AssigneeShip and Ocean Industries R&D Center
InventorsYa-Lin TSAI, Ching-Yeh Hsing, Shang-Sheng Chin, Kuan-Kai Chang
Life of this patent
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Abstract
An all-speed-range propeller having stern fins comprises an all-speed-range propeller installed on a propelling shaft of a boat, and a plurality of stern fins installed between the all-speed-range propeller and a hull of the boat. When the all-speed-range propeller having stern fins is applied to the oblique boat on which the propelling shaft is disposed obliquely, the stern fins directly guide the water flow toward the all-speed-range propeller, so that the uneven inflow caused by the obliquely-designed propelling shaft can be conquered to promote the operating efficiency of the all-speed-range propeller.
Claims7
An all-speed-range propeller having stern fins being able to be installed on an oblique boat;
- wherein, said oblique boat having a hull established along a horizontal line;
- at least one propelling shaft being disposed on said hull, and said propelling shaft being set with respect to said horizontal line by an included angle;
- said all-speed-range propeller having stern fins further comprising:
- an all-speed-range propeller disposed on said propelling shaft having a plurality of blades;
- and
- a plurality of stern fins installed surroundingly on said propelling shaft at intervals, between said hull and said all-speed-range propeller.
Dependencies are inferred from the claim text.