JPH03213486A - Hump reducing device for surface gliding boat - Google Patents

Abstract

PURPOSE:To perform high speed sailing by supporting a float to a hold stay through an air spring cylinder and a rise and fall attitude control cylinder in a manner to be capable of freely pitching, in a surface gliding boat to glide in a state to support a boat body in the air by means of a plurality of longitudinally and laterally arranged floats. CONSTITUTION:In a surface glinding boat, hold stays S are mounted in a properly sideways protruding state on both sides in the vicinity of the front and rear end parts of a boat body H, and a float F is supported to the lower part of each of the hold stays S. A pusher is suspended from the intermediate part of the boat body H, and sliding over a water surface is effected through rotation of a propeller located therebelow. In this case, the one end part of the hold stay S is vertically rockably supported with 1 at the boat body H, and the float F is pivotally supported with 2 at the other end of the hold stay S in a manner to be capable of freely pitching. An air spring cylinder 3 is located between the upper part of the hold stay S and a beam 6 mounted on the boat body H, while an air control cylinder 8 to control rise and fall attitude of the neck part of the float is located between the tail part of the float F and the cylinder 3.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hydroplane boat that navigates with its hull supported in the air by a number of floats and springs,
When sailing, the float maintains its straightness and can freely move up and down, and also has the float's unique vertical swing (hereinafter referred to as
It is possible to overcome the large resistance (hereinafter referred to as hump) that becomes an obstacle when increasing speed by controlling or buffering the water reaction (hereinafter referred to as inertia resistance) that is experienced when gliding at high speed. The purpose is to reduce

Conventionally, planing boats whose hulls are supported by floats and springs have high speed and comfort unmatched by conventional personal planing boats, but as shown in Figures 1, 2, and 3, , the holding struts S that connect the hull and each float have the effect of maintaining the straightness of the float F and allowing it to move up and down freely, but on the other hand, it restricts the float's own pitching movement, and when the speed increases, As shown in Figure 4, the float F generates the same wave-making resistance as a displacement-type hull and also creates waves.
Because there are multiple points, the hump is higher than that of a normal planing boat, and when transitioning to a planing state, a large horsepower engine is required, the boat weight increases, and the hump becomes larger. There were drawbacks. In addition, when sliding at high speeds, reducing the amount of water splash caused by collision with waves is a factor in reducing inertia, but since the float's unique pitching movement is inhibited, a large amount of water splash is generated. However, there were limits to measures to reduce propulsion resistance. (H is the hull and P is the propulsion device.) This invention focuses on the unique pitching motion of each float and solves these drawbacks.The following is an example of the invention, which is explained with the help of a diagram. It is.

5, 6, and 7 are explanatory diagrams of an embodiment according to the present invention, in which the holding strut S is made of a light material and has a structure with low wind pressure resistance, and one end thereof is connected to the hull pin 1 to the hull H. Connected to the other end to allow free downward swing and prevent back and forth swing. The other end of the holding column S is connected to a float F shown in FIG.
traverses the upper surface of the float on a vertical line approximately at the center of the lifting force range A that is received during sliding, and as shown in Figure 7, is connected by the float pin 2 to hold the float, allowing float F to perform its own pitching motion and rolling. Seal the movement.

In addition, an air spring cylinder 3 that supports the hull is attached to the upper part of the holding strut S on a straight line approximately at the center of the lift range A that the float receives when sliding, using a cylinder pin 4, and its rod end 5 is attached to a beam provided on the hull H. 6 by attaching it with a herot bin 7 to act as an air spring, allowing the holding column S to swing vertically.

Furthermore, as shown in FIG. 5, the air control cylinder 8 for controlling the up-and-down posture of the float neck is placed on the tail line of the float F, and connected to the float neck by the float neck universal joint 9.
The control cylinder pins 10 are respectively attached to the upper part of the air spring cylinder 3 to control or dampen the up-and-down movement of the float F.

The air spring cylinder 3 and the air control cylinder 8 are each connected to a suitable source of pressurized air.

(T is the air supply port of the air spring cylinder 3, C is the control air inlet/outlet to the air control cylinder 8, and WL is the water surface.) Since the embodiment according to the present invention has the above configuration, the holding column S is unique to the float F. The air control cylinder 8 can control or dampen the up-and-down movement of the float neck.

In addition, the straightness of the float F is easily controlled by the float pin 2 because the external force acting on the float during sliding is short and wide, as shown in the lift range A shown in Part 3 (6). can be held.

Therefore, when the surface watercraft according to this embodiment increases its speed from a stationary state and reaches a hump state, the air pressures of the air spring cylinder 3 and the air control cylinder 8 are set appropriately, so that each of the plurality of floats F can be adjusted to the best possible state. In addition, at the beginning of the hump, the attitude of the float F can be appropriately changed as shown in Figure 9, and the transition to a planing state can be made very easily. It is possible to eliminate wasted power in the hump.

In addition, during planing, the spring constant of the air spring cylinder 3 that supports the hull is set to an appropriate value, and the air control cylinder 8 that controls the float is operated as a buffer, so that the inertia resistance generated when the float F collides with waves is can be significantly reduced.

Further, according to the present invention, many economic effects can be expected, such as opening up a way for large pontoons to slide.

(4,

[Brief explanation of drawings]

1, 2 and 3 are explanatory diagrams of a conventional personal watercraft whose hull is supported in the air by floats, and are a side view, a top view and a front view, respectively. FIG. 4 is an explanatory diagram of wave-making resistance encountered by the conventional personal watercraft as its speed increases. 5, 6, and 7 are a side view, a plan view looking through the beam 6, and a front view, respectively, illustrating an embodiment of the present invention using a part of the hull. FIG. 8 is an explanatory diagram showing the range of lifting force acting on the bottom of the float F during sliding. FIG. 9 is an explanatory diagram in which the hydroplane boat according to the present invention attempts to overcome a hump by controlling the attitude of the float F. 1=Hull pin 2=Float pin 3=Air spring cylinder 4=Cylinder pin 5=Rot end 6
= Beam 7 = Rod pin 8 = Air control cylinder 9; Float neck freely 10 = Control cylinder bin joint S = Hull and float F - Holding strut H that connects the float = Hull A - Lifting force range that the float receives when planing C = Control air inlet/outlet P - propeller T = air supply port WL = water surface

Claims (1)

[Claims] In a hydroplane boat whose hull is supported in the air by a large number of floats and springs, the hull and each float are connected by an appropriate holding strut and appropriate pins at both ends of the retaining strut, and are moved to an appropriate position on the retaining strut. When supporting the hull by providing an appropriate spring and connecting the holding strut to the hull, the float mounting part should be able to move up and down freely while preventing back and forth rocking, and when connecting the holding strut to the float, , the connection position is placed on the vertical line, which is approximately at the center of the lift force when the float slides, and the float maintains its straightness, restricts the float's unique horizontal movement (rolling), and also allows vertical movement (pitching). 1. A hump reduction device for a hydroplane boat, further comprising a suitable control device to control or buffer the up-and-down motion of the float neck.