Which method is used primarily with heated wings to control ice formation?

Heated wings are an effective means of controlling ice formation, and electrical heating elements are the primary method used in this regard. These elements work by generating heat, which is then distributed across the wing surfaces to maintain them at a temperature above freezing. This prevents ice from forming on the wings during flight in conditions conducive to icing, ensuring that the aircraft maintains its aerodynamic properties and safety.

The use of electrical heating elements allows for efficient and controlled heating of the wing surfaces. This method is particularly advantageous because it can be activated as needed, based on real-time conditions, and helps minimize the weight and complexity that might be associated with other systems.

In contrast, other methods listed, such as water injection or chemical de-icers, might be employed in different ice protection systems or applications, but they do not directly relate to the heating process of the wings themselves. Hot air circulation can also be a viable option but is typically associated with different aircraft designs or configurations. However, if heated wings are discussed, electrical heating elements stand out as the primary and most effective method for controlling ice formation.