A physical-mathematical model consisting of six elementary fluid dynamic forces and stall effects acting on a ship is proposed by the authors. They then examine specific fluid forces in the model, such as induced drag, cross flow drag and stall effects. This examination generated a new mathematical model. In this paper, data presented in previous papers concerning wind forces on various types of ships was analysed using this new mathematical model. It was found that these formulae could describe measured forces and give reasonable physical representations of the formulae in terms of fluid dynamics. For the estimation of fluid dynamic forces, correlation between the coefficients of wind forces and six nondiemnsional hull parameters (aspect ratio, B/L, B/H, T/L, X/L and Ax/Ay), and the correlation between wind force coefficients were examined. The coefficients of correlations between some parameters or fluid dynamic coefficients had significant levels in these cases. Therefore, each fluid dynamic coefficient of wind forces could be estimated from nondimensional hull parameters and the correlation between fluid dynamic coefficients.