JPH07117781A - Catamaran type hydrofiol craft having auxiliary floating device - Google Patents

Abstract

PURPOSE:To shorten transfer time from a launchedly navigating condition to a cruising condition by arranging particularly an auxiliary floating device in a plural-hull type hydrofoil craft. CONSTITUTION:In a catamaran type hydrofoil craft having plural hulls 1, a floating auxiliary composed of a large blade 8 whose front edge part is pivotally fixed by an underwater horizontal shaft 9 and a blade driving mechanism 10 whose rear edge part can be lowered underwater by rotating the blade 8 from a condition where the blade 8 is housed almost horizontally, is arranged additionally between mutual front parts of the respective hulls 1 and 1 above a front hydrofoil 4. In sailing, when the rear edge part of the blade 8 is lowered underwater, since large lift is generated, the hulls can be raised above the water surface in a short time in cooperation with lift generated by the respective hydrofoils 4 and 5, so that it can transfer to a cruising condition at a short sailing distance.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-hull hydrofoil, and more particularly to a hydrofoil equipped with a device for assisting levitation of the hull at the start of sailing.

[0002]

2. Description of the Related Art Conventional multi-hull hydrofoils include those shown in FIG. 4 (side view) and FIG. 5 (bottom view).
A multi-hull type hull in which a plurality of hulls 1 and 1 are arranged in parallel so as to be laterally separated from each other, and a front support leg 2 and a rear part projecting downward from a front part and a rear part of the hull, respectively. The supporting legs 3 and the front hydrofoil 4 and the rear hydrofoil 5 which can be lifted above the water surface by lift forces generated when the boat is traveling, supported by the lower ends of the support legs 2 and 3, respectively.
It consists of and. In FIG. 5, reference numeral 6 indicates a front flap, and reference numeral 7 indicates a rear flap. In such a conventional hydrofoil, the flap 6 attached to each hydrofoil 4, 5 is operated to drive the hydrofoil to a cruise state in which the speed is increased to lift the hull above the water surface. It was carried out only depending on the lift force controlled by 7.

[0003]

As described above, in the conventional hydrofoil ship, the operation for increasing the speed from the landing navigation state to the cruising state is performed by the lift force of the two horizontal wings 4, 5. However, since these lifts are relatively small at the beginning of the acceleration of the hull, a long mileage is required before the hull floats above the surface of the water, and a large amount of energy (fuel) is consumed. is there. Therefore, the present invention is equipped with a device that can assist the levitation of the hull 2 during the transition from the landing navigation state to the cruising state, thereby reducing the cruising distance until reaching the cruising state. An object is to provide a multi-hull hydrofoil with an auxiliary device.

[0004]

In order to achieve the above-mentioned object, a multi-hull hydrofoil with a levitation assist device of the present invention is provided with a plurality of fuselage in parallel so as to be laterally separated from each other. Due to the hull of the double-hull type, the front support legs and the rear support legs protruding downward from the front and rear parts of the hull, and the lift force generated at the time of sailing supported by the lower ends of these support legs. In a double-hull hydrofoil vessel comprising a front hydrofoil and a rear hydrofoil capable of lifting the hull above the water surface, a front edge portion between the front parts of the fuselage above the front hydrofoil. Is composed of a large wing plate pivoted by a horizontal axis and a wing plate drive mechanism that can lower the edge of the wing plate into the water by rotating the wing plate from a state where the wing plate is stored substantially horizontally. It is characterized by a levitation assist device attached.

[0005]

In the above-mentioned compound hull-type hydrofoil with levitation assist device of the present invention, the large wing plate mounted on the front part of the hull is used when the speed changes from the landing navigation state to the cruise state. A large lift is generated by rotating the front edge around the horizontal horizontal axis from the state where it is stored almost horizontally and lowering the trailing edge into the water.Therefore, together with the lift generated by each hydrofoil, the hull is raised above the water surface. It can be lifted in a short time, and it will transition to a cruise state with a short mileage.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A multi-hull hydrofoil with a levitation assisting device as an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view thereof, FIG. 2 is a bottom view thereof, and FIG. It is explanatory drawing for demonstrating the operation progress of an apparatus.

As shown in FIGS. 1 and 2, this multi-hull hydrofoil ship is also the same as a multi-hull type hull in which a plurality of hulls 1 and 1 are laterally separated from each other in parallel. Front support legs 2 projecting downward from the front and rear of the hull, respectively
And a rear support leg 3, and a front hydrofoil 4 and a rear hydrofoil 5 that can be lifted above the water surface by lift forces generated by the respective support legs 2 and 3 when they are supported by the lower ends thereof. It is configured. In FIG. 2, reference numeral 6 indicates a front flap and reference numeral 7 indicates a rear flap.

In the double-hull hydrofoil of the present embodiment, the front edge portion is pivotally mounted by the horizontal transverse shaft 9 between the front portions of the fuselage 1, 1 above the front hydrofoil 4, in particular. A levitation assisting device including a large blade 8 and a blade drive mechanism 10 capable of rotating the blade 8 from a state where the blade 8 is stored substantially horizontally and lowering the rear edge of the blade 8 into the water is attached. Has been done. In the present embodiment, the blade drive mechanism 10 is equipped with a hydraulic cylinder having an upper end pivotally attached to the hull and a lower telescopic end pivotally attached to the upper surface of the trailing edge of the blade 8.

Since the double-hulled hydrofoil with levitation assist device of the present embodiment is constructed as described above, as shown in FIG. 3, the propulsion device (not shown) increases the speed from the landing navigation state a to cruising. At the time of shifting to the state c, as shown in the state b during the shifting, the large blade 8 mounted on the front part of the hull is rotated from the substantially horizontally stored state around the horizontal horizontal axis 9 at the leading edge. By rotating to the bottom and lowering the trailing edge into the water, a large lift force is generated.
The hull can be lifted above the water surface in a short time in combination with the lift generated by the
Will be moved to. Then, after the transition to the cruise state c, the vane 8 is stored in the original horizontal state.

Although the above-described embodiment shows a catamaran hydrofoil, it goes without saying that the present invention can also be applied to a compound-hull hydrofoil having three or more bodies.

[0011]

As described in detail above, according to the multi-hull hydrofoil with a levitation assisting device of the present invention, the following effects can be obtained. (1) A large vane mounted on the front of the hull rotates from a state where it is stored almost horizontally to rotate around the horizontal horizontal axis of the front edge to lower the rear edge into the water, thereby providing a large lift. As a result, the hull can be lifted above the water surface in a short time in combination with the lift generated by each hydrofoil. (2) Due to the above item (1), it is possible to shift to a cruise state with a short mileage, which can contribute to energy (fuel) saving. (3) Since the large wing plate is returned to the original horizontal state after use, the wing plate does not hinder stable cruising during cruising.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a compound hull hydrofoil with a levitation assisting device as an embodiment of the present invention.

FIG. 2 is a bottom view of the hydrofoil of FIG.

FIG. 3 is an explanatory view showing an operation progress of a levitation assist device in the hydrofoil of FIG. 1.

FIG. 4 is a side view showing a conventional catamaran hydrofoil.

5 is a bottom view of the hydrofoil of FIG. 4.

[Explanation of symbols]

 1 Fuselage 2 Front support leg 3 Rear support leg 4 Front hydrofoil 5 Rear hydrofoil 6 Front flap 7 Rear flap 8 Blade 9 Horizontal transverse axis 10 Blade drive mechanism

Claims (1)

[Claims] 1. A compound-hull type hull in which a plurality of hulls are laterally separated from each other in parallel, a front support leg projecting downward from a front portion and a rear portion of the hull, and In a double-hull hydrofoil vessel consisting of a rear support leg and a front hydrofoil and a rear hydrofoil capable of lifting the above hull above the water surface by lift forces that are respectively supported by the lower end portions of these support legs and lifted during sailing, Above the front hydrofoil, there is a large vane whose front edge is pivotally attached by a horizontal transverse axis between the front parts of the fuselage, and from the state where the vanes are stored substantially horizontally. A multi-hull hydrofoil with a levitation assisting device, characterized in that a levitation assisting device comprising a vane driving mechanism capable of rotating the vane and lowering its trailing edge into the water is attached.