JPS61178284A - High-speed boat equipped with wing body at its bow - Google Patents

Abstract

PURPOSE:To improve the cruising performance of a cruiser at the time of high waves and position the center of buoyancy at the rear part of its hull by installing a submerged wing body in the shape of an inverted T in its cross section and stretching substantially fore and aft in its longitudinal section and forming a negative angle of incidence causing downward dynamic lift. CONSTITUTION:At the down side of a bow part a wing body 1 is attached through a strut 2, while a pair of rudders 5 and a pair of propellers 6 are installed beneath the bottom of a stern part. The wing body 1 is installed on the strut 2 in such a manner as to shape an inverted T, forming a flat plate being long fore and aft. Furthermore, the wing body 1 is fixed to the strut 2 in such a state that it is inclined downward in the forward direction relative to the base line B.L. running in parallel with the draft line W and therefore has a negative angle of incidence. By means of this, it is possible to restrain the vessel's jumping due to external wave force during its cruising at a high speed. Also since the center of buoyancy can be placed at a rear part, it is possible to shift the cabin or living quarters more to the rear part where the movement of the hull is lesser.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a high-speed boat, and particularly to a high-speed boat having a wing body provided under the bottom of the bow portion.

[Conventional technology]

In order to reduce the hull motion of a high-speed boat in waves, a technology has been developed in which a torpedo-shaped water body 1 is mounted under the bottom of the bow section via a strut 2, as shown in Figure 5.6. This greatly improves the seaworthiness of high-speed boats.

Note that the symbol W in the figure indicates the waterline.

[Problem that the invention seeks to solve]

However, in high-speed boats with torpedo-shaped submersible bodies, the center of buoyancy of the hull is located too far forward due to the torpedo-shaped water body installed under the bottom of the bow. etc.), the center of buoyancy and center of gravity cannot be balanced in the longitudinal direction, and the superstructure has to be placed in the front of the ship, where the hull movement is intense, and the seaworthiness of the torpedo-shaped water body is affected. The problem is that improvements are not being fully utilized.

The present invention aims to solve these problems by using simple means, while maintaining the seaworthiness of the hull.
By moving the center of buoyancy of the hull to the rear,
To provide a mackerel high-speed boat with a bow wing body, in which the upper structure of the hull is disposed at a rearward position where the hull movement is small.

[Means for solving problems]

For this reason, the high-speed boat with a bow wing body of the present invention is equipped with a wing body attached via a strut to the lower side of the bottom of the bow section, and in order to suppress the hull movement during high-speed cruising in waves.
The cross section of the concrete and the strut is formed in an inverted T-shape, and the wing body is formed in an elongated shape in the longitudinal direction, and the wing body has a wing wall or a negative angle of attack that can generate downward lift. It is characterized by having the following.

[For production]

In the above-described high-speed boat with a wing body at the bow of the present invention, the wing body is attached to the lower bottom of the bow section via a strut, which suppresses the hull movement during high-speed cruising in waves, and also moves the center of buoyancy of the hull forward. It never moves.

〔Example〕

Hereinafter, a high-speed boat with a bow wing body as an embodiment of the present invention will be explained with reference to the drawings. FIG. 1 is a perspective view of the boat as seen diagonally from below, FIG. 2 is a side view of the boat, and FIG. 3 is a front view of the boat. FIG. 4 is a front view showing a specific modification thereof.

13 = As shown in Figures 1 to 3, there is a wing body 1' under the bottom of the bow.
is attached via a strut 2', and a pair of rudders 5 and propellers 6 are installed on the left and right under the bottom of the stern, respectively.
is provided.

In addition, the wing body 1' has a strut 2' connected to the strut 2'.
They are arranged so that the cross-sectional shape they form together is an inverted T-shape, and is formed in a flat plate shape that is elongated in the front-rear direction.

Further, the wing body 1' is attached to the strut 2' in a state of descending forward with respect to base lines B and L parallel to the waterline W and having a negative angle of attack.

Note that the symbol W in the figure indicates the waterline.

Since the high-speed boat with a bow wing body of the present invention is constructed as described above, during high-speed cruising, as shown in FIG. 2, a downward lift force 4 is generated by the water flow 3 hitting the wing body 1''. This lift force 4 counteracts the external force of waves acting on the bow of the ship, and suppresses the bow of the ship from jumping out above the waterline W.

Moreover, the concrete 1' reduces the vertical motion of the hull by creating resistance to vertical motion in the water.

In this way, hull motion during high-speed navigation in waves is suppressed, and the resistance of the high-speed boat is greatly improved.

Furthermore, in the high-speed boat of the present invention, a flat, lightweight wing body 1' is used instead of the conventional torpedo-shaped water body (see reference numeral 1 in Figures 5 and 6), so compared to the conventional one, While this does not increase hull resistance, it also makes it possible to move the hull's center of buoyancy to the rear, allowing the hull's superstructure to be placed in a position closer to the rear where the hull movement is smaller. . ' □Furthermore, Fig. 4 shows a modified example of the wing body 1', and the wing body does not have to be in the shape of a horizontal straight line when viewed from the front like the wing body 1' shown in Fig. 3. , it may also be in the form of a fV-shaped zigzag, like the concrete 1'' shown in FIG.

In other words, the wing body may have any shape as long as it can generate downward lift during high-speed cruising, and slight differences in the shape of the wing body are not relevant to the essence of the present invention.

〔Effect of the invention〕

As described in detail above, according to the high-speed boat with a bow wing body of the present invention, the boat is equipped with a concrete attached to the lower bottom of the bow section via a strut, and suppresses hull motion during high-speed navigation in waves. - The cross section of the wing body and the strut is formed in an inverted T-shape, and the wing body is formed in an elongated shape in the longitudinal direction, and the wing wall can generate downward lift; With an extremely simple configuration that has a negative angle of attack, it is possible to suppress the upheaval caused by the external force of waves during high-speed cruising, suppress the hull motion, and greatly improve seaworthiness. Since the center of buoyancy of the hull is no longer located extremely forward, there is also the advantage of locating the hull upper structure, including the living quarters, in a portion closer to the rear where the hull movement is small.

[Brief explanation of drawings]

Figures 1 to 4 show a light high-speed boat with a bow wing body as an embodiment of the present invention, in which Figure 1 is a perspective view of the boat seen diagonally from below, Figure 2 is a side view of the boat, and Figure 3 is a side view of the boat. Its front view, #4
The figure is a front view showing a modified example of the wing rest, -〇- Figure 5.6 shows a conventional high-speed boat with a torpedo-shaped water body, Figure 5 is a perspective view of the boat seen diagonally from below, and Figure 6 is a front view showing a modified example of the wing rest. The figure is a side view thereof. 1', 1"...wing body, 2'...strut, 3...
Water flow, 4. Lifting force, 5. Rudder, 6. Propeller, B, L
...Baseline, W...Waterline.

Claims (1)

[Claims] A wing body is attached to the bottom of the bow of the ship via a strut, and the cross section of the wing body and the strut is formed into an inverted T shape in order to suppress the movement of the ship during high-speed navigation in waves. and a bow wing body, characterized in that the wing body is formed in an elongated shape in the longitudinal direction, and the wing body has an airfoil shape capable of generating downward lift or a negative angle of attack. high speed boat.