What effect do leading slats have on a wing?

Leading slats play a crucial role in altering the aerodynamic characteristics of a wing, specifically by increasing the wing's camber and reducing the stall speed.

When leading slats are deployed, they extend the wing's surface forward and create a slot between the slat and the wing. This configuration allows for a more effective airflow over the wing at higher angles of attack, which in turn increases the camber of the wing. Increased camber enhances lift generation by allowing the wing to maintain favorable airflow and delay stall—this means the wing can reach a higher angle of attack before it begins to lose lift.

Additionally, by reducing the stall speed, leading slats enable aircraft to fly safely at lower speeds without the risk of aerodynamic stall. This is particularly beneficial during critical phases of flight, such as takeoff and landing, where lower speeds are commonplace.

In summary, the presence of leading slats successfully increases the wing's camber and simultaneously helps lower the stall speed, leading to improved performance and safety.