Title:
LOW-RESISTANT BOAT FORM
Document Type and Number:
Japanese Patent JP3674114
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a low-resistant boat form, which can restrict the increase of resistance of a large vessel in a short-wave area at the minimum.
SOLUTION: In the case where cross dimension of a large vessel is expressed with B, longitudinal dimension thereof is expressed with L, real area of a front- half part of a hull is expressed with AWF, and a coefficient of water plane of a front-half part of a full is expressed with CWF(CWF=AWF/(LB/2)), parameter θ0 is decided by the calculus of variation, and coefficients of C1, C2, and λof formulas x=(2cosθ-cos2θ)/4λ+C1/λ, y=(2sinθ+sin2θ)/4λ+C2/λ for giving a coordinate of a form (x, y) are decided so as to obtain the form of water plane, which can obtain the minimum bluntness factor proportioned to the increase of resistance.
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Inventors:
Seiya Yamashita
Application Number:
JP29874095A
Publication Date:
July 20, 2005
Filing Date:
November 16, 1995
Export Citation:
Assignee:
Ishikawajima Harima Heavy Industries Co., Ltd.
International Classes:
B63B1/40; B63B25/08; (IPC1-7): B63B1/40
Domestic Patent References:
| JP61012487A | ||||
| JP63030298U |
Attorney, Agent or Firm:
Tsunemitsu Yamada
Seiichi Otsuka
Seiichi Otsuka