Systems and methods for electronic medical record and clinical content management are disclosed. Common ignition-off locations may be learned and stored in a database along with the number of ignition-off occurrences associated with each learned location. Pressurized fluid may be introduced between the knife gate and the rear of the immediate downstream piston to cause a differential pressure to propel the piston through the toroidal cylinder. Engine speed is then held in a calibrated flare using the PID logic.