What term describes the high peaks on the edges of spray patterns?

The term "wing tip vortex" refers to the swirling air currents that are produced at the tips of aircraft wings as they generate lift. When an aircraft operates, the high-pressure air underneath the wing moves around the tip to the lower-pressure area on top of the wing, creating a vortex. In the context of aerial application, these wing tip vortices can enhance the dispersion and coverage of the spray pattern. Specifically, they create high peaks or "spikes" in the spray pattern on the edges, which can be important for ensuring that the pesticide or fertilizer covers the intended area effectively.

While other terms like "pressure spikes," "feathered edges," and "rotational drag" relate to aerodynamic effects or spray characteristics in some way, they do not specifically define the phenomenon observed as high peaks on the edges of spray patterns. Therefore, understanding wing tip vortices is crucial for pilots and applicators aiming for efficient and effective aerial spraying.