How do the vortices move when looking from behind an aircraft?

When observing the vortices created by an aircraft from behind, it's important to understand the mechanics of how these vortices are produced during flight. As an aircraft generates lift, the high-pressure air under the wing flows around the wingtip to the low-pressure area above the wing, resulting in the formation of vortices.

For any aircraft with a conventional wing setup, the vortex created by the left wing rotates in a counterclockwise direction when viewed from the rear. Conversely, the vortex from the right wing rotates in a clockwise direction when observed from the same vantage point. This difference in directionality is due to the rotation of the air as it moves from high to low pressure around the wingtips, influenced by the direction of lift and the design of the wings.

Understanding this principle is crucial for air traffic controllers and pilots, especially regarding wake turbulence and the safe separation of aircraft during takeoff and landing phases. Recognizing the behavior of these vortices enhances situational awareness and aids in the safe management of air traffic around departing and arriving aircraft.