What is utilized by the wing anti-ice system on the 737-800 to prevent ice formation?

The wing anti-ice system on the 737-800 employs bleed air to prevent ice formation. This system utilizes hot air taken from the engines, known as bleed air, which is ducted to the leading edges of the wings. When activated, the hot air heats up the wing surfaces, effectively melting any ice that may form or preventing its formation during flight in cold and humid conditions.

This method is efficient for de-icing because it makes use of the existing engine systems, ensuring a timely response to ice accumulation without the need for external substances or additional electric components. The use of bleed air is a common practice in many aircraft for wing and engine anti-ice functions, leveraging the heat generated during engine operations for safety and performance.

Other options such as electric heat, while used in some aircraft for similar purposes, are not the primary method for the 737-800. Similarly, liquid antifreeze is not utilized in the wing anti-ice system, and radiant heat is not a common method used in aviation for ice prevention.