JPS6171295A - Vinned high speed vessel - Google Patents

Abstract

PURPOSE:To improve the comfortability by stretching fins having negative attack angle from the left/right sides near the bottom at the stern of high speed vessel having initial bow trim thereby lowering the bow section continuously under sailing. CONSTITUTION:In high speed vessel having initial trim where the bottom at the stern 2 will rise against a base line 3 parallel with the water line W toward the rear, a pair of fins 5, 5' having downward negative attack angle are stretched to the left/right near the bottom at the stern where the bottom is lowest against the water line. Under sailing, downward force will function continuously to prevent exposure of the bottom at the stern due to rolling of hull thus to prevent hammering. consequently, the comfortability can be improved without increasing the resistance of full.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、初期船首トリムを有する高速艇に関し、特に
このような高速机においてフィンをそなえたものに関す
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to high-speed watercraft having an initial bow trim, and more particularly to the provision of fins in such high-speed craft.

〔従来の技術〕[Conventional technology]

従来上り、第３図に示すごとく、大直径のプロペラ１を
ｔＡ罰して推進効率を上げるために、船尾船底２が水線
Ｗに平行な基線３に対し後方へゆく程切り上がっている
、すなわち初期船首トリムを有する高速艇が提案されて
いる。Conventionally, as shown in Fig. 3, in order to increase the propulsion efficiency by increasing the propulsion efficiency of the large-diameter propeller 1, the stern bottom 2 is cut upwards toward the rear with respect to the base line 3 parallel to the water line W. That is, a high-speed boat having an initial bow trim has been proposed.

なお、第３図中の符号４は舵を示す。Note that the reference numeral 4 in FIG. 3 indicates a rudder.

しかしながら、このような初期船首トリムを有する高速
艇では、高速走性中に大きな走行トリム（船尾トリム）
がつき、船体抵抗が増大して、全体の推進効率が向上し
ない。However, in high-speed boats with such an initial bow trim, a large running trim (stern trim) occurs during high-speed running.
This increases the hull resistance and does not improve the overall propulsion efficiency.

そこで、第４１ｊＪに示すごとく、船尾端にフィン５を
設けて、走行トリムを少なくすることも提案されている
。Therefore, as shown in No. 41jJ, it has been proposed to provide a fin 5 at the stern end to reduce the running trim.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

しかしながら、このような従来のフィン付き高速艇では
、船尾端に作用する力によって船首部を沈めてトリムを
是正しようとするために、大きいモーメントを発生させ
る必要があり、そのためフィン５を相当大きなものにし
なければならず、これｌこより船の全長が増加するため
、係船等の際、邪魔になる。However, in such a conventional finned high-speed boat, it is necessary to generate a large moment in order to correct the trim by sinking the bow due to the force acting on the stern end, so the fins 5 are made considerably large. This increases the total length of the ship, which becomes a nuisance when mooring the ship.

まｒこ、船尾吃水の変化によって、フィン５の効果が左
右される等の問題点がある。There are problems such as the effectiveness of the fins 5 being affected by changes in the rout and stern water.

本発明は、このような問題７巨を解決しようとするもの
で、船の全長を増加させることなく、しかも船尾吃水の
変化１こよってフィンの効果が左右されることがないよ
うにしｒこ、フィン付き高速艇を提供することを目的と
する。The present invention is an attempt to solve these problems, and to do so without increasing the overall length of the ship, and to prevent the effect of the fins from being influenced by changes in stern water. The purpose is to provide a high-speed boat with fins.

〔問題点を解決するための手段〕[Means for solving problems]

このため、本発明のフィン付き高速艇は、初期船首トリ
ムを有する高速＃！（こおいて、本線面に対し船底が最
も低くなっている船首部の船底付近に、負の迎え角を有
するフィンが左右に張り出すように装着されたことを特
徴としている６ ［作用〕 上述の本発明のフィン付き高速艇では、本線面に対し船
底が最も低くなっている船首部の船底付近に、負の迎え
角を有するフィンが、高速走行中に受ける流体力によっ
て、下向きの力を生じ、船首部を下げる作用、すなわち
走行トリムを是正する作用をなす。Therefore, the finned high speed boat of the present invention has a high speed #! with an initial bow trim. (This is characterized by the fact that fins with a negative angle of attack are installed near the bottom of the bow, where the bottom of the ship is lowest relative to the main line, so as to protrude to the left and right.6 [Function] As mentioned above. In the finned high-speed boat of the present invention, a fin with a negative angle of attack is located near the bottom of the bow section where the bottom of the boat is lowest relative to the main line surface, and generates a downward force due to the fluid force received during high-speed running. , has the effect of lowering the bow, that is, correcting the running trim.

〔実施例〕〔Example〕

以下、図面により本発明の一実施例としてのフィン付き
高速艇を示すもので、第１図はその側面図、第２図は第
１図の■矢視方向から見た喉弐図であり、ｆ５１．２図
中、第３，４図と同じ符号はぼ１；同様の部分を示して
いる。The drawings below show a finned high-speed boat as an embodiment of the present invention, and FIG. 1 is a side view thereof, and FIG. 2 is a throat view seen from the direction of the arrow ■ in FIG. In Figure 2, the same reference numerals as in Figures 3 and 4 indicate similar parts.

本実施例の場合も、第１図に示すごとく、船尾船底２が
水線Ｗに平行な基＃ａ３に対し後方へゆく程切り上がっ
ている、すなわち初期船首トリムを有する高速艇に関す
るが、従来と異なる点は次の点である。すなわち第１．
２図に示すごとく、水線Ｗ面に対し船底が最も低くなっ
ている船首部の船底付近に、下向きの迎え角、すなわち
負の迎え角を有する一対のフィン５’　、５’が左右に
張り出すように装着されていることである。In the case of this embodiment, as shown in FIG. 1, the stern bottom 2 is cut upward toward the rear with respect to the base #a3 parallel to the water line W, that is, the high-speed boat has an initial bow trim. The differences are as follows. That is, the first.
As shown in Figure 2, a pair of fins 5', 5' with a downward angle of attack, that is, a negative angle of attack, are stretched on the left and right near the bottom of the bow, where the bottom of the ship is lowest with respect to the waterline W. It means that it is attached so that it comes out.

このような構成により、高速走行中において、これらの
フィン５′に作用する流体力によって下向きの力が生じ
、これが船首部を下げる作用、すなわち走行トリムを是
正する作用をなす６また、これらのフィン５′は船首部
に取り付けられるので、船尾付きの従来のフィンよりも
、船首部を下げる効果が者しい。With this configuration, during high-speed running, the fluid force acting on these fins 5' generates a downward force, which acts to lower the bow, that is, to correct the running trim. Since the fin 5' is attached to the bow, it is more effective in lowering the bow than a conventional fin attached to the stern.

さらに、走行中学に下向きの力が作用しているので、波
浪中の船体動揺によって船首船底が露出するのを十分に
防止することができ、これにより船首船底が波面をたた
く確率も減じるため、乗心地が大幅に改善される。Furthermore, since a downward force is acting on the boat while the boat is running, it is possible to sufficiently prevent the bow bottom from being exposed due to the hull shaking during waves, and this also reduces the probability that the bow bottom will hit the wave surface. Comfort is greatly improved.

〔発明の効果〕〔Effect of the invention〕

以上詳述したように、本発明のフィン付き高速艇によれ
ば、初期船首トリムを有する高速艇において、水線面に
対し船底が最も低くなっている船首部の船底付近に、負
の迎え角を有するフィンが左右に張り出すように装着さ
れるという簡素な構成で、船の全長を増加させることな
く、航走中学に船首部を下げることができる、すなわち
走行トリムを与えることができ、これにより船体抵抗の
増加を招かないで、しかも乗心地の大幅な改善をもたら
すことができる利点がある。As detailed above, according to the finned high-speed boat of the present invention, in a high-speed boat having an initial bow trim, a negative angle of attack is present near the bottom of the bow section where the bottom of the boat is lowest with respect to the waterline. With a simple structure in which the fins are attached so that they stick out to the left and right, the bow can be lowered during sailing without increasing the overall length of the ship. This has the advantage of not causing an increase in resistance and yet significantly improving riding comfort.

【図面の簡単な説明】[Brief explanation of the drawing]

第１．２図は本発明の一実施例としてのフィン付き高速
艇を示すもので、第１図はその側面図、ｔｔＳ２図は第
１図の■矢視方向から見た俣式図であり、第３図は従来
の初期船首トリムを有する高速艇を示す側面図であり、
第４図は従来の初期船首トリムを有する高Ｍ艇において
船尾部にフィンをそなえたものを示す側面図である。 １・・プロペラ、２・・船尾船底、３・・基線、４・・
舵、５′　・・フィン、Ｗ・・水線。 復代理人　弁理士　飯　沼　義　彦 第１図 第３図Fig. 1.2 shows a high-speed boat with fins as an embodiment of the present invention, Fig. 1 is a side view thereof, and Fig. ttS2 is a Matata-style view seen from the direction of the ■ arrow in Fig. 1. FIG. 3 is a side view showing a high-speed boat with a conventional initial bow trim;
FIG. 4 is a side view showing a conventional high M boat having an initial bow trim and having a fin at the stern. 1. Propeller, 2. Stern bottom, 3. Baseline, 4.
Rudder, 5'...Fin, W...Waterline. Sub-Agent Patent Attorney Yoshihiko Iinuma Figure 1 Figure 3

Claims (1)

【特許請求の範囲】[Claims] 初期船首トリムを有する高速艇において、水線面に対し
船底が最も低くなっている船首部の船底付近に、負の迎
え角を有するフィンが左右に張り出すように装着された
ことを特徴とする、フィン付き高速艇。A high-speed boat with an initial bow trim, characterized in that fins with a negative angle of attack are installed near the bottom of the bow, where the bottom of the boat is lowest with respect to the waterline, so as to protrude from side to side. High-speed boat with fins.