How is the wing anti-ice air discharged?

Wing anti-ice air is discharged from vent holes located along the bottom side of the wing leading edge. This design facilitates the effective distribution of warm air, helping to prevent the accumulation of ice on the wing. By routing the anti-ice air to the lower surface, it allows for a more direct and controlled application of heat to the critical areas of the wing where ice is most likely to form. This method ensures that the leading edge remains clear of ice, maintaining the aerodynamic integrity of the wing and improving overall flight safety.

Other methods listed may not efficiently maintain the required temperature and airflow necessary for effective anti-icing. For example, vents on the top of the wing might not provide adequate coverage where ice accumulation occurs, and open slots could compromise the wing structure or its aerodynamic profile. Discharging air directly from the engine is usually not used for wing anti-ice systems, as it may not provide consistent and controlled heating as required for effective ice prevention.