Figure 11. Drag coefficient of the rudder with and without propeller (J=0.4, J=1.1).

From

Hydrodynamic Characteristics of the Propeller-Rudder Interaction by RANS Solver

Seyed Morteza Javadpour, Ali Eskafi Noghani, Hassan Ghassemi, David Molyneux

American Journal of Mechanical Engineering. 2019, 7(1), 35-40 doi:10.12691/ajme-7-1-4