JPH0296398U

JPH0296398U -

Info

Publication number: JPH0296398U
Application number: JP499189U
Authority: JP
Priority date: 1989-01-19
Filing date: 1989-01-19
Publication date: 1990-08-01

Description

[Brief explanation of drawings]

第１図は本考案の一実施例としての舶用ダブル
リアクシヨンフインの部分側断面図であり、第２
〜４図は従来の舶用ダブルリアクシヨンフインを
示すもので、第２図は右舷側からみた船尾側面図
、第３図は第３図の―矢視断面図、第４図は
第３図の―矢視断面図であり、第５図は前方
フインと後方フインとの間隔ｌＦとフイン幅ＣＦ
との比ｌＦ／ＣＦ（横軸）と、ダブルリアクシヨ
ンフインの推進効率η（縦軸）との関係を示すグ
ラフである。１……船体、２……スターンフレーム、３……
船底、４……プロペラ軸、６……ボス、７……後
方フイン、８……前方フイン。 FIG. 1 is a partial side sectional view of a marine double reaction fin as an embodiment of the present invention;
Figures 4 to 4 show conventional marine double reaction fins. Figure 2 is a side view of the stern seen from the starboard side, Figure 3 is a sectional view taken along the - arrow in Figure 3, and Figure 4 is a cross-sectional view of Figure 3. - It is a sectional view taken in the direction of arrows, and Fig. 5 shows the distance IF between the front fin and the rear fin and the fin width CF.
It is a graph showing the relationship between the ratio lF/CF (horizontal axis) and the propulsion efficiency η (vertical axis) of the double reaction fin. 1...hull, 2...stern frame, 3...
Bottom of the ship, 4...propeller shaft, 6...boss, 7...rear fin, 8...front fin.

Claims

[Scope of utility model registration request]

In a ship, a plurality of rear fins as reaction fins are provided in front of the stern propeller and protrude radially from a boss provided surrounding the propeller shaft of the propeller, and the propeller shaft is attached from the hull in front of the rear fin. A plurality of front fins are provided as reaction fins that protrude radially from the front fin, and the front fin and the rear fin are formed to have approximately the same fin width, and the rear edge of the front fin and the rear A double reaction fin for marine use, characterized in that the distance between the fin and the leading edge of the fin is set to 2 to 4 times the width of the fin.