FLAP RUDDER FOR HIGH-SPEED SHIP

• Main Authors: UEDA TAKESHI, SAITO YASUO, SHIMIZU HODAKA, IKEDA HIROSHI
• Format: Patent
• Language: English
• Published: 04.10.1994
• Edition: 5
• Subjects: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; EQUIPMENT FOR SHIPPING; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; MARINE PROPULSION OR STEERING; PERFORMING OPERATIONS; RELATED EQUIPMENT; SHIPS OR OTHER WATERBORNE VESSELS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRANSPORTING

PURPOSE:To improve steering function by providing necking at a connection part between a strut and a flap rudder to reduce a negative peak pressure when a flap angle is increased and retard the generation of cavitation and resultant ventilation. CONSTITUTION:In the horizontal cross-section forms of a strut 3 and a flap rudder 4 in which the flap rudder 4 is connected rotatably to the rear of the strap 3 suspended from a hull, necking 7 is formed at a connection part 6 of these two so that the direction of a tangential line at the rear end of the strut 3 always crosses the flap rudder 4, or an aerofoil section independent of the strut 3 and flap rudder 4 is formed so that the virtual rear edge 3a of the strut is located ahead of the rear edge 4a of the flap rudder 4.