high speed boat

Abstract

The invention relates to a high-speed boat, which includes a hull and more than three power units installed inside or outside the hull, and each power unit drives a propeller. The hull includes deck, bottom plate and stern closure plate. The stern closure plate is composed of left and right symmetrical folded plates in Guanzhong longitudinal section. The folded plates are vertically stretched from the bottom plate to the deck by corresponding fold lines, so that the At least one concave area toward the bow is formed, and at least one propeller is arranged in each concave area. It has the advantage of being able to obtain a higher speed under the design requirements of the same driving power configuration.

Description

technical field [0001] The invention relates to the improvement of the shape of the stern closely related to the hydrodynamic characteristics of the ship, in particular to a high-speed craft with an improved stern structure. Background technique [0002] When designing the stern of existing ships, the low-speed ship adopts the structure design of the arc-shaped stern, while the high-speed ship adopts the structure design such as figure 1 The structural design of the flat stern shown in Fig. form a small angle. [0003] In ship design, under the condition of fixed displacement, the speed is usually closely related to the length-to-width ratio of the power plant and hull, especially for high-speed boats, see figure 2 , its power units mostly use outboard or outboard engines, in order to achieve the design speed, as many power units as possible are often used and arranged in a line on the flat stern. Thus, in the case of a small hull space, the aspect ratio cannot be reduce...

AI Technical Summary

Problems solved by technology

As a result, when the space of the hull is small, the length-to-width ratio cannot be reduced, because the reduction of the length-to-width ratio will greatly increase the wave-making resistance

figure 2 Another problem with the design method is that due to the small lateral spacing of the power unit, it will cause installation difficulties and inconvenient maintenance, as well as mutual interference during manipulation.

In order to overcome the above problems, in the prior art, there are image 3 It adopts three high-power main engines arranged in the main engine compartment according to the character font, but its relatively complicated long stern shaft makes the design of the shafting structure very complicated, which is only suitable for ships with large displacement.

Figure 4 It is a power plant layout diagram of a small high-speed boat. Its four outboard engines force the boat to reach a width of 4.2 meters. With this design, the wave-making resistance increases sharply under the condition of a certain displacement. The boat has invested a huge amount of power in exchange for A small increase in speed is very uneconomical

Images