Calculation Method of the Forces Generated by a Propeller in Yaw Using the Vortex Method

Theoretically, several calculation methods have been proposed to calculate the force generated by a propeller in yaw within the scope of the blade element theory. There have also been several measurements of the force generated by a propeller in yaw and the wake. In recent years, several analyses have been performed using CFD. In this report, we propose a calculation method based on the vortex method, which has a much lower calculation cost than CFD but can calculate the phase lag that cannot be captured by the blade element theory. The results of this calculation method were in good agreement with the results of past CFD calculations and experimental results. We also calculate the contribution of a pusher propeller to directional stability as the area of the vertical tail that provides the same stability.