JP2002053093A - Stern wave fairing device for high speed sailing vessel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fair a stern wave easily flown at a wake (track) board by forming a faired stern wave in a stern wave fairing device capable of generating a wake (track) and generating a high stern wave fairing effect by generating a downward lift at a high speed sailing vessel. SOLUTION: An underwater propeller 2 for fairing a stern wave is vertically movably and fallably/standably supported to a hull 1 bottom of the high speed sailing vessel. A wake (track) is generated by generating a downward lift by the underwater propeller 2. Thereby, a high stern wave fairing effect is generated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stern wave shaping device for a high-speed traveling ship, and more particularly to a high-speed traveling ship capable of generating a downward lift to generate a stable wake.
The present invention relates to a stern wave shaping device that generates a high stern wave shaping effect.

[0002]

2. Description of the Related Art As a common sense in shipbuilding science, researches have been conducted to reduce the resistance of ships. The main theme of ship resistance was wave-making resistance at high speeds, so reducing wave-making resistance was the main theme. However, as a new marine sport, a type of water skiing, a type of wake board, is being developed. This is a sport that uses the waves at the stern of a boat when traveling at high speed and enjoys jumping and other acrobatics. For that, a well-designed stern wave is needed.
The stern wave of a high-speed boat has a diverging wave and a traverse wave.
nsverse wave), and what is used for a wakeboard is mainly a diverging wave. To increase the waves, high-speed boats were usually loaded with a large amount of heavy objects in a well-balanced manner, thereby increasing the total weight of the hull and causing diverging waves to be generated.

[0003]

The problems to be solved by the invention are as follows. 1. Decrease in acceleration performance 2. Lower fuel consumption. There were drawbacks such as pressure on the living space inside the ship.

The present invention increases the apparent weight (hull drainage weight) by generating an unprecedented downward lift, eliminates the above-mentioned drawbacks, forms a well-formed stern wave, and makes the stern easy to fly. It shapes waves.

[0005]

According to a first aspect of the present invention, a hydrofoil 2 for shaping a stern wave is supported at the bottom of a hull 1 of a high-speed traveling ship so as to move up and down and descend. A stern wave shaping device for a high-speed traveling ship characterized by generating stable wakes (wakes) and generating a high stern wave shaping effect.

According to a second aspect of the present invention, the hydrofoil 2 has a sharp leading edge, and the plane shape of the hydrofoil 2 is such that it is inclined backward from the center and recedes. It is.

[0007]

FIG. 1 is a side view of an embodiment of the present invention, FIG. 2 is a half plan view thereof, and FIG. 3 is a front view thereof. A hydrofoil 2 for shaping the stern wave on the bottom of the hull 1 of the high-speed traveling ship
Is supported by the shaft 3 to move up and down and raise. As shown in FIG. 1, the shaft 3 is connected to a vertical movement mechanism 4 and a lifting mechanism 5.

As shown in FIG. 2, the hydrofoil 2 has a sharp leading edge, and its plane shape is inclined rearward from the center and recedes. approach b. Accordingly, the hydrofoil 2 has a shape in which both sides are curved upward in a letter-like shape along the bottom of the hull 1 and is easy to store, and its front edge has a structure that prevents the algae from splashing and cuts the algae.

Next, the operation of this apparatus will be described with reference to FIGS. The hydrofoil 2 is at a position along the ship bottom as shown by the solid line in FIG. 4 when stored, but is operated to the position 2a in FIG. The hydrofoil 2 has a flat upper surface and a lower surface which swells downward to generate a downward lift. Alternatively, the hydrofoil 2 may generate a downward lift by setting the front edge down by the elevating mechanism 5 with both upper and lower surfaces flat. This increases the apparent hull weight and generates a stable large wake.

FIG. 5 is a perspective view showing the state of the stern wave.
The vortex structure generated from the stern is indicated by a thick line. The wakeboard makes a flight crossing in the area c where the thick lines intersect. Conventionally, in the flight area c of the wakeboard, a vertical vortex causes wave breaks composed of a rotating component of the vertical vortex on a slope facing the performer, which has become a resistance when the wakeboard crosses. However, in the present invention, as shown in FIGS. On the contrary, a strong clockwise vortex as viewed from the stern is emitted from the right wing tip d2 of the hydrofoil 2 which generates a downward lift. Therefore, if these emission positions are optimized, interference between the vortices will occur, and the apparent vortex intensity will be weakened as a whole. (Wake) can be generated, the wave shape in the flight area c can be adjusted, and a stern wave that is easy to fly is shaped.

[0011]

As described above, according to the first aspect of the present invention, the hydrofoil 2 for shaping the stern wave is provided on the bottom of the hull 1 of the high-speed traveling ship.
Is supported so as to move up and down and raise, and a downward lift is generated by the hydrofoil 2, which not only enables stable wake (wake) generation but also optimizes the vortex position emitted by the hydrofoil 2 Weaken the strength of the stern vortex, generate a high stern wave shaping effect, suppress the breaking of the wavefront flying on the wakeboard, shape the stern wave that is easy to fly, and significantly increase the hull weight In addition, it improves acceleration performance and straight running performance, reduces vertical motion due to waves, and does not compress the living space on board.

Further, in the second aspect of the present invention, the hydrofoil 2 has a sharp leading edge, and its planar shape is a shape that is inclined backward from the center and recedes, so that the algae is hung on the leading edge. It can prevent and cut the algae.

[Brief description of the drawings]

FIG. 1 is a side view of an embodiment of the present invention.

FIG. 2 is a plan view of a half thereof.

FIG. 3 is a front view showing a half of the cross section.

FIG. 4 is a front view showing an operating state of the hydrofoil with a half thereof being a cross section.

FIG. 5 is a perspective view showing a state of the stern wave.

FIG. 6A is a side view showing a state of vortex generation, and FIG. 6B is a rear view thereof.

[Explanation of symbols]

 1. . . Hull 2. . . Hydrofoil

Claims (2)

[Claims] 1. A stern wave shaping hydrofoil (2) is supported at the bottom of a hull (1) of a high-speed traveling ship so as to move up and down and raise and lower.
A stern wave shaping device for a high-speed traveling ship, characterized in that a downward lift is generated by a hydrofoil (2) to enable stable wake (wake) generation and a high stern wave shaping effect. 2. The stern wave shaping device for a high-speed traveling ship according to claim 1, wherein the hydrofoil (2) has a sharp leading edge, and has a planar shape that is inclined backward from the center and recedes.