JPS60209386A - Movable type skeg - Google Patents
Movable type skegInfo
- Publication number
- JPS60209386A JPS60209386A JP6628584A JP6628584A JPS60209386A JP S60209386 A JPS60209386 A JP S60209386A JP 6628584 A JP6628584 A JP 6628584A JP 6628584 A JP6628584 A JP 6628584A JP S60209386 A JPS60209386 A JP S60209386A
- Authority
- JP
- Japan
- Prior art keywords
- skeg
- turning
- stern
- shaft
- rudder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Power Steering Mechanism (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、船舶の船尾部に装着されるスケグの改良に関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a skeg mounted on the stern of a ship.
第1図に従来のスケグを船尾部1て装着した平面図を示
す。船尾部に装着されるスケグ4は旋回時の船尾を横切
る流れを制限し船体1の保針性、方向安定性を改善する
だめのものである。FIG. 1 shows a plan view of a conventional skeg attached to the stern section 1. The skeg 4 attached to the stern is intended to restrict the flow across the stern during a turn and improve course keeping and directional stability of the hull 1.
これはスケグ4が船体1の回頭時に旋回抵抗として働く
ことから本来のその船型の方向安定性が向上する。This is because the skeg 4 acts as turning resistance when the hull 1 turns, thereby improving the directional stability of the hull.
しかし、従来のスケグ4は、装備されることにより旋回
抵抗が増加し本来の働きである方向安定性が増す反面、
この旋回抵抗の増加によりできるだけ速やかに船舶を回
頭させる必要がある場合、旋回性能が低下するという欠
点がある。However, when the conventional skeg 4 is installed, the turning resistance increases and the directional stability which is the original function increases, but on the other hand,
When it is necessary to turn the ship as quickly as possible due to this increase in turning resistance, there is a drawback that turning performance is deteriorated.
これを右1わシの運動を示す第1図によシ説明すると、
船体1が風・波などの外乱を受けわずかに回頭運動が誘
起された場合、これに伴ない船尾流5は左舷の方向から
スケグ4に流れ込むこの船尾流5によシスケグ4には、
船尾を左舷から右舷に押す向きのスケグに働く力βが作
用する。これは船体1の右1わシの回頭運動を阻止する
モーメントとなシ、スケグ4により船体の方向安定性が
向上する。This can be explained using Figure 1, which shows the movement of the right arm.
When the hull 1 is induced to turn slightly due to disturbances such as wind and waves, the stern flow 5 that follows this flows into the skeg 4 from the port side.This stern flow 5 causes the skeg 4 to
A force β acts on the skeg in a direction that pushes the stern from port to starboard. This is a moment that prevents the turning movement of the starboard arm of the hull 1, and the skeg 4 improves the directional stability of the hull.
一方舵2を操作し旋回運動を誘起する場合、舵カフによ
り船体1は右1わシの回頭運動を開始するがこれに伴な
い船尾流5が、左舷側からスケグ4に流入する。このた
めスケグ4には船尾を左舷から右舷に押す向きのスケグ
に働く力6が作用する。これは舵カフの方向と逆向きと
なり舵カフによる旋回力が減じられたことと等価となる
。このためスケグ4を装着された船舶は一般に旋回力が
低下するという欠点を有する。On the other hand, when the rudder 2 is operated to induce a turning movement, the hull 1 starts turning to the starboard 1 by the rudder cuff, and the stern flow 5 flows into the skeg 4 from the port side. Therefore, a force 6 acting on the skeg in a direction that pushes the stern from port to starboard acts on the skeg 4. This is equivalent to the direction opposite to that of the rudder cuff and the turning force due to the rudder cuff being reduced. For this reason, ships equipped with the skeg 4 generally have a disadvantage in that their turning power is reduced.
本発明は、上述した従来のスケグの不具合を解消し、保
針中は旋回抵抗として作用し旋回中は旋回力を発生する
スケグを提供することを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-described problems of the conventional skeg, and to provide a skeg that acts as turning resistance during course keeping and generates turning force during turning.
このため、本発明の可動式スケグは、船尾のボッシング
の下方に、舵軸とほぼ平行な軸1わりに回転可能なスケ
グを設けたことを特徴としている。Therefore, the movable skeg of the present invention is characterized in that a skeg rotatable about a shaft substantially parallel to the rudder shaft is provided below the stern bossing.
以下、図面により本発明の可動スケグについて説明する
と、第2図は本発明の可動式スケグの一実施例を示すだ
めの船尾部の斜視図であっテ、同図に示すように可動式
スケグ14はプロペラボッシング8の下部に舵軸とはソ
平行な回転軸18に装着されている。この図は保針操船
時の状態を示したもので可動式スケグ14面は、水面と
垂直の向きにあり旋回時には旋回抵抗として作用する。The movable skeg of the present invention will be explained below with reference to the drawings. FIG. is attached to the lower part of the propeller bossing 8 on a rotating shaft 18 parallel to the rudder shaft. This figure shows the state during course-keeping maneuvering, and the movable skeg 14 is oriented perpendicular to the water surface and acts as a turning resistance when turning.
第3図は舵2を操作した旋回中の様(3)
子全示したもので可動式スケグ14は回転軸18の寸わ
りに回転した状態にあシその方向は舵角と同じである。FIG. 3 shows a state in which the rudder 2 is being operated during a turn (3). The movable skeg 14 is in a state of being rotated about the size of the rotating shaft 18, and its direction is the same as the rudder angle.
このときの流体力の作用を右回シの回頭運動について示
した第4図によシ説明すると、船尾流5は船体左舷方向
から流入してきている。舵カフは船尾を右舷から左舷に
押す方向に働いており右唸わりモーメントラ発生してい
る。一方、スケグ14についても船尾を右舷から左舷に
押すスケグに働く力16があり、これも右1わりモーメ
ントを発生しており全体として舵2のみの場合よりもス
ケグ14もあわせて操作した場合の方が旋回力が増加す
る。The action of the fluid force at this time will be explained with reference to FIG. 4, which shows the turning motion of the starboard. The stern flow 5 is flowing in from the port side of the ship. The rudder cuff is working to push the stern from starboard to port, creating a starboard snarl moment. On the other hand, regarding the skeg 14, there is also a force 16 acting on the skeg that pushes the stern from starboard to port, which also generates a starboard turning moment, and as a whole, the effect when the skeg 14 is also operated is greater than when the rudder 2 is used alone. The turning force increases.
従来のスケグ4は第1図に示すように船体に固定されて
いるので、積極的に船体1を旋回させたい場合にはこの
タイプのスケグ4では、旋回抵抗として働き旋回性能が
低下する。Since the conventional skeg 4 is fixed to the hull as shown in FIG. 1, when it is desired to actively turn the hull 1, this type of skeg 4 acts as a turning resistance and reduces turning performance.
こ°のように、本発明の可動式スケグでは舵軸とほぼ平
行な軸重わりに回転させることの出来る構造とし、保針
操船時は通常のスケグとして(4)
作用し、旋回時にはこの軸重わpに舵角と同じ方向に回
転させることによシ可動式スケグに揚力を発生させ舵に
よる旋回力に可動式スケグの旋回力を付加するようにし
たので旋回性能を低下させずに保針性能を向上させるこ
とができる。また旋回運動が誘起された後でもこの旋回
運動を停止させたい場合には操舵に加え、この可動式ス
ケグの角度を調整し旋回抵抗として働かせ速やかに回頭
運動を阻止することができる利点もある。As shown above, the movable skeg of the present invention has a structure that allows it to rotate under the weight of an axis that is almost parallel to the rudder axis, and acts as a normal skeg (4) during course-keeping maneuvers, and when turning, this axle weight is used. By rotating the rudder in the same direction as the rudder angle, the movable skeg generates lift and the turning force of the movable skeg is added to the turning force of the rudder, so it is possible to maintain course without reducing turning performance. Performance can be improved. Furthermore, if you want to stop the turning movement even after the turning movement has been induced, there is an advantage that in addition to steering, you can adjust the angle of this movable skeg to act as turning resistance and quickly stop the turning movement.
すなわち本発明の可動式スケグにより保針性能、旋回性
能の両面を向上させることが可能となる効果を有するも
のである。That is, the movable skeg of the present invention has the effect of making it possible to improve both course-keeping performance and turning performance.
第1図は従来のスケグを装着した船体の平面図である。
第2図は本発明の一実施例としての可動式スケグを備え
た船体船尾部の斜視図、第動式スケグ装着した船体の平
面図である。
■・・・船体、2・・・舵、3・・・プロペラ、4・・
・スケグ、5・・・船尾流、6・・・スケグに働く力、
7・・・舵力、8・・・ボッシング、14・・・可動式
スケグ、16・・・可動式スケグに働く力、18・・・
回転軸FIG. 1 is a plan view of a hull equipped with a conventional skeg. FIG. 2 is a perspective view of the stern section of a hull equipped with a movable skeg as an embodiment of the present invention, and a plan view of the hull equipped with a second movable skeg. ■... Hull, 2... Rudder, 3... Propeller, 4...
・Skeg, 5... Stern flow, 6... Force acting on the skeg,
7... Rudder force, 8... Bossing, 14... Movable skeg, 16... Force acting on the movable skeg, 18...
Axis of rotation
Claims (1)
回転可能なスケグを設けたことを特徴とする可動式スケ
グ。A movable skeg characterized in that a skeg rotatable around an axis parallel to the rudder shaft is provided below the bottoming of the stern.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6628584A JPS60209386A (en) | 1984-04-03 | 1984-04-03 | Movable type skeg |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6628584A JPS60209386A (en) | 1984-04-03 | 1984-04-03 | Movable type skeg |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS60209386A true JPS60209386A (en) | 1985-10-21 |
Family
ID=13311399
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6628584A Pending JPS60209386A (en) | 1984-04-03 | 1984-04-03 | Movable type skeg |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60209386A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01278896A (en) * | 1988-04-29 | 1989-11-09 | Toshiba Corp | Water-jet pusher boat |
JPH0826191A (en) * | 1994-07-19 | 1996-01-30 | Nippon Souda Syst Kk | Mariner type rudder |
-
1984
- 1984-04-03 JP JP6628584A patent/JPS60209386A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01278896A (en) * | 1988-04-29 | 1989-11-09 | Toshiba Corp | Water-jet pusher boat |
JPH0826191A (en) * | 1994-07-19 | 1996-01-30 | Nippon Souda Syst Kk | Mariner type rudder |
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