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Click Ok on the window that popped. 

Lastly, we need to change the Origin of rotation of the copied wall boundary conditions. To do so, select each of them ("wall_blade_top" and "wall_blade_right"), click "Edit..." and change the "Rotational-Axis Origin" to the respective centroid.

Observe that the options selected for the first wall boundary condition were copied to each new one.

Now that we're done with Boundary Conditions, we're almost ready to run the simulation!

MAYBE it's to big? Video...? 

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