Kawasaki Jukogyo Kabushiki Kaisha

Haruyoshi Maruyama

Takehiro Nakashima

Yoshinori Tsumiyama

Kanji Kiyohara

Mitsuhiro Yazaki

Hisashi Fujii

Shin Ogata

Kunihiko Kamio

Kiyoaki Maeda

Masafumi Ikeyama

Joe Heim

Haruki Okada

Troy Kite

Chris Hagest

Takeshi Sugawara

The present invention provides a watercraft having steering components (steering tabs or stabilizers) for maintaining steering capability even while amount of water ejected from a propulsion pump is decreased. The steering components are movably disposed on a hull of the watercraft at or below the water level on both right and left sides to be in an &ldquo;Operating State&rdquo; in which resistance of water is larger or to be in a &ldquo;Non-operating State&rdquo; in which the resistance of water is smaller in accordance with steering operation. Furthermore, a mechanism for absorbing an external force acting on the steering components in the &ldquo;Operating State&rdquo; is located in a system for operating the steering components. The mechanism reacts to the external force to allow the steering components to be transformed into the &ldquo;Non-operating State.&rdquo;

Watercraft

Provided is a hull shape of a personal watercraft which can enhance speed performance, and still more, can also reduce rolling of a body. A bulging face,is formed on an outside part of a rear portion of a hull bottom,having a substantially V-shaped cross section and protrudes downward from an outside front face,positioned in front of the outside part. The bulging face,includes a fore part,inclined downward in the rearward direction, and a rear part,positioned above a virtual face A extended rearwardly from the fore part

Hull shape of personal watercraft

A bottom structure of a personal watercraft enhances the running performance of a personal watercraft. A concavo-convex face (,) having very small concave or convex portions for drawing air from an outside of a watercraft is formed on a water contact face (S) in a bottom surface (,) of the personal watercraft during planing. The air is drawn by the concavo-convex face (,), thereby separating a water flow from the bottom surface (,). Consequently, frictional resistance to the water in the bottom surface (,) can be reduced.

Bottom structure of personal watercraft

Hull for a motorboat

A small watercraft hull is shaped to prevent spray from being splashed on occupants of a watercraft, to enhance the course stability of the craft during turning, and to reduce the resistance of the craft body 3 to the water. A longitudinal chine, extending in a longitudinal direction, and rearwardly curved transverse chines extending in transverse directions and located in the fore part of the craft body, are provided on a V-shaped hull bottom of the craft body, the transverse chines being so formed as to cross the forward part of the longitudinal chine or an imaginary line extended forwardly from the longitudinal chine.

Hull shape of small watercraft

Growing community of inventors

Kakogawa, Japan

Haruyoshi Maruyama