What do slats do to the airflow over a wing?

Slats are devices found on the leading edge of an aircraft's wings, and their primary function is to enhance the airflow over the wing during critical phases of flight, such as takeoff and landing. When slats are deployed, they modify the wing's camber and increase its surface area. This alteration has the effect of increasing lift at lower speeds, allowing the aircraft to fly with a higher angle of attack without stalling.

Additionally, while slats boost lift, they also contribute to an increase in drag. This is because the way in which they change the wing's profile allows for greater airflow separation before reaching a stall condition, ultimately resulting in a more efficient flight at lower speeds but with some associated drag.

Thus, slats play a crucial role in enhancing performance during crucial flight stages while providing pilots with better control and stability in such conditions.