Title:
SHIP BOTTOM STRUCTURE OF PLANING BOAT
Document Type and Number:
Japanese Patent JP3111184
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To reduce friction resistance with a water flow at planing time of a planing boat, by forming an irregular surface having a fine recessed part or protruded part separating the water flow from a ship bottom surface by rolling in air from outside a hull to partly a water contact surface at planing time in the ship bottom surface.
SOLUTION: A pair of irregular surfaces 21, having a fine recessed part or protruded part for involving air from outside a hull partly to a water contact surface S in a surface region surrounded by a draft line WL at planing time on a ship bottom surface 20 to be formed as almost triangular shape, are formed in a position of right/left symmetry by interposing a center line E. The irregular surface 21 formed between a first vertical strip 9 and a chine C in rearward both outer side parts of the hull surface 20 has a plurality of vertical grooves 22 extended in parallel to the center line E as a fine recessed part. In this way, air 18 involved in the vertical groove 22 from the forward or the rearward of a hull outer part by the irregular surface 21 separates a water flow from the hull surface 20, so as to reduce friction resistance with water in the hull surface 20, sailing performance can be improved.
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Inventors:
Kanji Kiyohara
Mitsuhiro Yazaki
Takehiro Nakajima
Maruyama Haruyo
Yu Fujii
Takeshi Sugawara
Mitsuhiro Yazaki
Takehiro Nakajima
Maruyama Haruyo
Yu Fujii
Takeshi Sugawara
Application Number:
JP7747699A
Publication Date:
November 20, 2000
Filing Date:
March 23, 1999
Export Citation:
Assignee:
Kawasaki Heavy Industries, Ltd.
International Classes:
B63B1/04; B63B1/36; B63B35/73; B63B1/18; (IPC1-7): B63B1/18; B63B1/36; B63B35/73
Domestic Patent References:
| JP4119292U | ||||
| JP3126786U |
Attorney, Agent or Firm:
Shuji Sugimoto