JPH01109192A - Catamaran with hydrofoil - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a catamaran underwater vessel that has both the features of a catamaran and a hydrofoil.

(Prior art) Some ships are called catamarans and others are called underwater ships.A catamaran has a buoyant body that is long in the front and back direction below the left and right of the upper structure of the hull. Since the buoyant body is connected to the buoyant body via a thinner strut, the hull upper structure is always located above the water surface, and the thinner strut portion becomes a water cutout, so that when berthed and This has the advantage that the hull is not easily affected by waves while traveling, and the hull is prevented from buckling from side to side, increasing stability and providing good riding comfort. In addition, since the above-mentioned underwater χ ship is constructed by connecting hydrofoils to the lower part of the upper 4R structure of the hull via struts, the upper structure of the hull is lifted from the water surface by the lift generated by the hydrofoils during navigation. It has the advantage that it floats, therefore the running resistance is small, and a high running speed can be easily obtained.

(9. Problem that Ming is trying to solve) However, in the above-mentioned catamaran, two fairly large buoyant bodies are always located below the water surface as a means of obtaining buoyancy, so when sailing, these two The drawback is that the buoyancy body receives a large amount of resistance (drag force) from the water, making it difficult to achieve high-speed performance. or.

In the case of the above-mentioned underwater χ ship, when the ship is at anchor, part of the hull E structure is submerged in the water, just like a normal ship, so there is no shadow from the waves! The disadvantage is that the ship's hull will be shaken more when it is anchored, which will affect its stability.

The present invention has been made in view of the above problems, and its first objective is to simultaneously achieve high-speed running performance and high hull stability when anchored and when running! The purpose of this project is to provide a large underwater catamaran that can be used in a variety of ways.

(Means for Solving the Problems) In order to achieve the object described in (1), the present invention connects buoyant bodies that are long in the front and back direction below the left and right of the hull upper structure via struts that are narrower than the buoyant bodies, and 2. , J? A hydrofoil was connected to the lower part of the gamma body via a strut, and a propulsion means was provided on the hydrofoil to construct a twin-hulled hydrofoil boat.

(Function) Therefore, when at anchor, no lifting force is generated in the hydrofoil, and the twin-hulled hydrofoil, like existing catamarans, receives the buoyancy force generated by the buoyant body submerged in the water. The superstructure of the ship is located above the water surface, and 41! Because the thin struts serve as water cutouts, the hull is hardly affected by waves.
Side-to-side shaking is kept to a minimum, resulting in high hull stability.

Furthermore, during navigation, lift is generated by the hydrofoils, and the twin-hulled underwater vessel functions in the same way as existing hydrofoils. In other words, the hull upper structure and buoyant body rise above the water surface due to the lift generated by the hydrofoils, and there are no buoyant bodies underwater that would act as running resistance, so the twin-hulled hydrofoil boat is not a hydrofoil boat. It is possible to travel at high speed in the same way. In addition, even when the ship is running, the wood cutting occurs on the thin struts that support the hydrofoils, so the ship's body sway is small and high stability is achieved, just as in the case when the ship is at anchor. .

(Example) Embodiments of the present invention will be described below based on the accompanying drawings.

FIG. 1 is a side view of a twin-hulled hydrofoil according to the present invention, and FIG. 2 is a sectional view taken along the line ■--■ in FIG.

The twin-hulled hydrofoil l has a hull superstructure 2 including one cabin 2a.
A buoyant body 3.3 having a long circular cross section in the longitudinal direction is connected to the lower right and left sides of the hull upper structure 2 via a strut 4.4 that is narrower than the buoyant body 3.3. . In addition, the buoyant body 3゜3 is connected to the above-mentioned hull upper structure 2 when moored.
The struts 4.4 have a volume large enough to generate enough buoyancy to float above the water surface, and the struts 4.4 are longitudinally shaped to minimize running resistance.

Further, below the buoyant bodies 3.3 and after the buoyant bodies 3.3 bend, hydrofoils 5.6 are connected via narrow vertical struts 7, 7, 8, 8, respectively. has been
At the left and right rear of the rear hydrofoil 6 are propellers 9 serving as propulsion means.
, 9 are provided. In addition, these propellers 9.9 are
It is rotationally driven by an engine (not shown) mounted on the hull superstructure 2 .

Next, the function of this large catamaran underwater ship l will be explained.

When at anchor, no lifting force is generated in the two underwater parts 15.6 before and after the vessel, so the twin-hulled hydrofoil 1 afllls in the same way as existing catamarans. That is, the hull upper structure 2 floats above the water surface A by receiving the buoyancy force generated by the two buoyant bodies 3.3 submerged in the water, and at this time, the wood cut portion on the water surface A is the width of both struts 4.4. Since the parts a and a are narrow, the hull upper structure 2 is hardly affected by waves, and the horizontal shaking of the hull upper structure 2 is suppressed to a small extent, thereby maintaining its high stability.

On the other hand, when running, the hull moves southward in response to the thrust generated by the two rotationally driven propellers 9, 9, and the hull receives the lift generated by the front and rear hydrofoils 5 and 6). The Jl structure 2 and the buoyant body 3.3 float above the water surface, indicated by B in the figure, so that the twin-hulled hydrofoil l functions in the same way as existing underwater vessels. In other words, the two buoyant bodies 3 that should act as running resistance when submerged in water
Because ゜3 floats above the water surface B as mentioned above.

The running resistance that the hull receives from the water is kept small, and as a result, the twin-hulled hydrofoil boat can run at high speeds like a hydrofoil boat. Also, during this running, the water cutting part of the water surface B is the part of the narrow strut 7.7.8.8.
, b'', the shaking of the ship is small and high stability can be obtained, similar to when at anchor.

In this way, the catamaran large underwater ship 1 has the features of existing catamarans and large underwater ships.

In the embodiments described above, each of the hydrofoils 5 and 6 is made into one wide wing, or, as shown in FIG. 3, for example, the rear hydrofoil is divided into left and right halves; 16b,
Even if these are connected by left and right struts 8.8, the same effect as described above can be obtained. Further, as the propulsion means, an autojet pump driven by a turbine engine may be used instead of the propeller.

(Effects of Issue 1!1) As is clear from the above explanation, according to the present invention, a buoyant body that is long in the rearward direction is installed at the bottom left and right of the two-part structure of the hull through struts that are narrower than the buoyant body. At the same time, a hydrofoil was connected below the buoyant body via a strut, and a propulsion stage was provided on the hydrofoil to form a large twin-hull underwater ship.
The high hull stability of existing catamarans when berthed,
The effect is that it is possible to simultaneously obtain the high-speed running performance of a hydrofoil ship and the high hull stability while running.74
It will be done.

[Brief explanation of the drawing]

Fig. 1 is a side view of a twin-hulled hydrofoil according to the present invention, Fig. 2 is a sectional view taken along the line ■-■ of Fig. 1, and Fig. 3 is similar to Fig. 21-a showing a modified embodiment of the present invention. This is a diagram. l...twin-hulled hydrofoil, 2-... hull superstructure, 3...
・Floating body, 4,7.8-...Strut, 5,6°16
a, 18b - Hydrofoil, 9... Propeller (1st stage of propulsion). Patent applicant: Yamaha Motor Co., Ltd. Agent
Patent Attorney Ryo Yama - Figure 1- et al. Figure 2 Figure 3

Claims (1)

[Claims] A buoyant body that is long in the front-rear direction is connected to the lower right and left sides of the hull upper structure via a strut that is narrower than the buoyant body, and
A hydrofoil is connected below the buoyant body via a strut,
A twin-hulled hydrofoil boat, characterized in that the hydrofoil is provided with a propulsion means.