At what altitude do the vortices of a larger aircraft typically sink and move laterally over the ground?

The vortices generated by a larger aircraft typically sink and begin to move laterally over the ground at an altitude of 100-200 feet. This range is crucial for pilots to understand because these vortices can be hazardous, particularly during takeoff and landing phases. At altitudes below 200 feet, the vortices can drift with the wind, creating a potential hazard for smaller aircraft that may be taking off or landing in the wake of a larger aircraft.

The phenomenon occurs due to the dynamics of airflow around the wings of the larger aircraft, which creates the vortices. As these vortices descend, they can remain at a relatively stable altitude for a period before they dissipate or move laterally due to wind. Recognizing this altitude range is important for maintaining safe separation distances between aircraft to avoid encounters with these potentially dangerous wake turbulence effects. Understanding where these vortices are most likely to be found helps pilots make informed decisions during critical phases of flight.