A calculation tool for screw propellers performances in non-axial flow

At first the paper describes the experimental methodology utilized for the screw propellers tested in inclined flow at the Naval Engineering Department of the University "Federico II" of Naples. Then the paper gives a mathematical model, obtained by means of the regression analysis on the experimental data, in order to evaluate the characteristics of a screw propeller acting in non-axial flow from that one, in axial flow.At the end an experimental validation of the mathematical model has also been carried out by using a sample of srew propellers having different geometrical characteristics from those ones used for the model generation.