Which aspect of structural icing is considered least significant to the aircraft's performance?

When evaluating the impacts of structural icing on aircraft performance, increased drag and decreased lift are typically the most significant factors affecting flight capabilities. Icing can lead to the accumulation of ice on critical surfaces, which disrupts airflow and changes the aerodynamic properties of the aircraft. Specifically:

• Increased drag occurs because the smooth contours of the aircraft's surfaces are altered, causing turbulence and resistance as the aircraft moves through the air.

• Decreased lift is crucial since when ice builds up on the wings or control surfaces, it can hinder the aircraft's ability to generate the required lift for sustained flight, especially during critical phases like takeoff and landing.

On the other hand, while increased weight from the accumulation of ice can be a factor, it is generally considered less significant compared to the performance impacts of drag and lift. The primary concerns revolve around how icing affects the aircraft's ability to maneuver and maintain altitude, which are directly influenced by drag and lift. Therefore, while all effects of icing need to be taken into account, the increased weight is often seen as less critical to an aircraft's operational performance than increased drag and decreased lift.