When flying at speeds in excess of 140 mph, to increase droplet size you should:

To understand why increasing spray pressure is the correct approach when flying at speeds in excess of 140 mph, it is important to consider how droplet formation works in aerial applications. When an aircraft travels at high speeds, the airflow around the aircraft tends to create a challenging environment for effective spray distribution. Higher speeds can lead to finer droplets being created due to the turbulence and the aerodynamic forces at play.

Increasing the spray pressure helps to overcome these challenges by forcing the liquid through the spray nozzles with greater velocity. This results in larger droplets because the higher pressure breaks the liquid into fewer, larger droplets instead of smaller ones, which are more susceptible to drift and evaporation before reaching the target area. This is particularly crucial when trying to ensure that the applied substances, such as herbicides or pesticides, are effectively delivered to the intended target.

Reducing spray pressure would generate smaller droplets, which increases the risk of off-target drift and reduces the efficacy of the application. Decreasing flight altitude can help with droplet deposition but does not directly influence droplet size in the same manner. Changing nozzle size could also be a consideration, but adjusting spray pressure is the immediate method to control droplet size effectively in high-speed situations.

Thus, increasing spray pressure is the