What is the primary role of carb heat in de-icing procedures?

The primary role of carburetor heat during de-icing procedures is to prevent ice in the carburetor. When operating in environments with low temperatures and high humidity, ice can form in the carburetor due to the cooling effect of fuel vaporization and the temperature drop that occurs in the carburetor throat. This can lead to decreased engine performance or even engine failure. By introducing warm air into the carburetor through the carb heat mechanism, the temperature is raised, which helps to melt any existing ice and prevent further accumulation. This enhances the engine's reliability and performance during critical flight phases, particularly in colder conditions.

Understanding this function is important for pilots, as it emphasizes the need for proactive measures in managing the risk of carburetor icing, especially in specific weather conditions.