Click Solve from the Setup tab:
Verify that the Solution Mode = Transient.
To determine the time step size, click the ... button on the Time Step Size line.
Click Number of Blades, and enter 4. Click the Calculate button. This sets the time step size to be 0.025 seconds.
Save Intervals_Results = 4.
Time Steps to run = 70.
Click Solve to start the analysis.
For more about time step selection for Rotating analyses
As the mesh is created, informational messages are displayed in the Output Bar. After the mesh is completed, the analysis runs.