The author has already developed a theoretical consideration in the first report, which deals with the effect of the angular velocity of steering upon the performance of rudder. This second report contains the results of model experiments, which were carried out at the circulating channel. The forces and moments acting upon the rudder were measured at both states, steady and unsteady. The measured increments of the twisting moment are compared with the theoretical values, which had reported in the first report. Generally the tendency and values of the measured increment coincided with the calculating ones.