Maneuvering Performance of a Ship with VecTwin Rudder System

This paper is concerned with the maneuvering motion of a ship with VecTwin Rudder system. Firstly the forces on a couple of rudders and the interaction between both rudders steered with rudder angle are investigated analytically and experimentally. Secondly the free running model experiments are conducted for the turning, zig-zag and stopping maneuvers which are compared with the results simulated by mathematical model to describe the maneuvering motion. Finally an expression of force on VecTwin Rudder is proposed for the MMG model.