Tank Tests on Low Speed Maneuvering of a Ship with VecTwin Rudder

Abstract

Tank tests were carried out using a ship model to capture the low speed maneuvering characteristics with respect to clabbing ， pivoting turn and clamshell backing of a ship with VbcTwin rudder system ． Captive model test was conducted to capture the hydrodynamic force characteristics when the ship speed is zero ． Based on the test results ， we determined two rudder angle combinations to realize the low speed maneuvering ． In free running model tests ， we confirmed the clabbing and pivoting turn by combination of starboard rudder angle 105 ° ， port rudder angle − 65 ° and bow thruster operatiQn 、 The clamshell backing was also confirmed by 土 105 ° for both port and starboard rudder angles ． Thus ， we found that the ship with V6cTwin rudder system has good ma 皿 euverability in low speed ， Keywords ' Vec 7 ' win rudder ， low speed maneuvering ， clabbing ， pivoting tuTn ， clamsheU backing キ