What conditions can lead to ice forming on aircraft wings?

What conditions can lead to ice forming on aircraft wings?

• A. Moisture present and temperature below 0 degrees
• B. Temperature above 40 degrees
• C. No moisture and warm temperature
• D. Dry air at altitude

Answer: (A)

Ice forms on wings when moisture is present in the air and the surface temperature is at or below freezing. In cold, humid conditions like in clouds, fog, or precipitation, liquid water droplets strike the wing and freeze on contact. That ice layer disrupts the smooth airflow over the wing, increasing drag and weight and raising the stall speed, which can reduce lift and threaten controllability. This is why the scenario with moisture present and temperatures below freezing is the one that leads to icing. The other situations don’t bring the necessary combination: without moisture there’s nothing to freeze, warm temperatures prevent freezing, and dry air at altitude has little water vapor to form ice.

Ice forms on wings when moisture is present in the air and the surface temperature is at or below freezing. In cold, humid conditions like in clouds, fog, or precipitation, liquid water droplets strike the wing and freeze on contact. That ice layer disrupts the smooth airflow over the wing, increasing drag and weight and raising the stall speed, which can reduce lift and threaten controllability. This is why the scenario with moisture present and temperatures below freezing is the one that leads to icing. The other situations don’t bring the necessary combination: without moisture there’s nothing to freeze, warm temperatures prevent freezing, and dry air at altitude has little water vapor to form ice.