...Flettner rudder is a type of rudder that uses a normal counterbalanced rudder as the main rudder, a small auxiliary rudder at its rear end, and the force acting on the auxiliary rudder to rotate the main rudder and reduce the horsepower of the steering gear. All of the above rudders use the lift acting on the rudder blade to create a turning force, but there are also other rudders that obtain turning force by manipulating the direction of the thrust of the screw propeller wake, such as the Kort nozzle rudder, which houses the screw propeller in a cylindrical nozzle and rotates the nozzle around a vertical axis to change the direction of the thrust, and the Kitchen rudder, which surrounds the screw propeller in two semicircular cylinders and provides the ship with thrust or turning force by opening and closing these cylinders and changing their direction. *Some of the terminology explanations that mention "Kitchen Rudder" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…また,ふつうの釣合舵を主舵とし,その後端に小さな副舵を設け,副舵に作用する力で主舵を回転させて操舵機の馬力を小さくする形式の舵をフレットナー舵という。以上の舵は,いずれも舵板に働く揚力を回頭力として利用するものであるが,このほかスクリュープロペラ後流の噴出方向を操作して回頭力を得る舵として,スクリュープロペラを円筒状ノズル内に収め,ノズルを鉛直軸のまわりに回転させて推進力の方向を変えるコルトノズル舵,2個の半円形の筒でスクリュープロペラを囲み,これらの筒の開閉とその方向変換で船に推進力または回頭力を与えるキッチェン舵などがある。 ※「キッチェン舵」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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