JPS6430899A - High speed catamaran boat - Google Patents

Abstract

PURPOSE:To reduce vertical oscillation without need for providing an oscillation reducing device and enable construction at a low cost by making the ratio of the length to width of a hull 10 or less, the maximum value of the apex angle of a V-shaped or nearly V-shaped trapezoidal sectional form 80 deg.-100 deg., and gradually increasing a water-line width toward the stern. CONSTITUTION:Each hull A which constitutes twin boats is formed in such a way that the ratio of length to width is 10 or less, its sectional form is V-shaped or nearly V-shaped trapezoid, the maximum value of the apex angle D of the trapezoid is in the range of 80 deg.-100 deg., and its water-line width is gradually increased from the bow toward the stern up to the rear of the position of center of buoyancy. Due to such a shape, the length can be made small while making the width large with respect to a desired displacement and, by restricting the apex angle D of the V-shaped section, the vertical oscillation of the hull A in a short wave length zone can be reduced. Also, by employing an water-line width in which the V-shaped section becomes the maximum width in the rear of the center of buoyancy from the bow, the center position of buoyancy of the hull A can be provided on the stern side tp form the hull A into a shape that can easily pass through waves.