JPS6130494A - Bow rudder - Google Patents

Abstract

PURPOSE:To decrease instability on steering while reduce the radius of curve when a boat takes a curve by providing a rudder made of a water switching board which has a fulcrum vertically in the draft on a bow and which can be turned to right and left with respect to the axis of said boat. CONSTITUTION:A rudder 2 is provided in the draft on a bow and is turned to the desired proceeding direction side from the axis of a hull as shown in the figure A when a boat is proceeding, to vary the direction of the axis of the hull by means of side pressure caused by a water flow and change in the introduction of water flow to the hull. When the boat is backing, the operation of the rudder is reversed marking it operate as in the case of the conventional rudder. The figure B shows that the boat is brought alongside the pier on the left side without varying its direction of axis as much as possible, as in the case of coming alongside the pier, etc. The operation of the rudder is reversed when the boat is parting from the pier. Thus, by operating the rudder on the bow in combination with the conventional rudder in the stern as appropriate, a direction varying point on the axis of hull can be brought closer to the center of the hull, rapidly increasing the side pressure for varying the direction of hull. Thereby, the radius of rotation of the hull can be reduced to facilitate the control of the boat when brought alongside or parting from the pier by means of the operation of the rudder.

Description

[Detailed Description of the Invention] The rudder, which is important when navigating a ship or changing its position, is located at the stern of the ship, except for those with special propulsion equipment, and when moving forward, by operating it to the left or right, the front half of the ship is used as a fulcrum for displacing the rudder. The stern was moved to change the course of navigation, and when going astern, the stern screw sucked in water from the rear of the ship, and the water flow was applied to the rudder located at the stern to change the axis of the ship when going astern. Since the fulcrum is in the fluid, the ability of the rudder becomes unstable due to various conditions such as the inertia of the hull, water flow conditions, and interference, and the turning radius is large, requiring a great deal of skill and experience. In order to reduce the instability and the turning radius during turning, a rudder 2 is installed in the bow end as shown in the figure, and when moving forward, it is bent toward the desired direction of travel from the hull axis as shown in Fig. 4A. The lateral pressure generated by the water flow and the induced change in the water flow to the hull change the direction of the ship's axis, and when going astern, the rudder operates in the opposite way to when going forward, making it work in the same way as a conventional rudder. Figure B shows how to use the conventional rudder on the left stern as needed without changing the hull axis as much as possible, as in the case of berthing. can rapidly increase the turning radius of the ship.

[Brief explanation of the drawing]

FIG. 1 is a right side view showing the configuration of the bow rudder. Figure 2 is a front view. Fig. 3 is a cross-sectional view taken along line X-X'' in Fig. 1. Fig. 4 shows the operation of a bow rudder and a conventional ship rudder 1 - Hull 2 - Bow rudder 3 - Rudder fulcrum 4 - Bulbous bow 5 −
Conventional ship rudder 6-Scree 7-Rudder i-Baku ・Patent applicant Shigeru Noma ゛B

Claims (1)

[Claims] A bow rudder that has a vertical fulcrum in the bow of the ship and has a cutting board that can be turned to the left or right with respect to the ship's axis.