What factor makes helicopter blades particularly susceptible to icing?

Helicopter blades are particularly susceptible to icing due to their high rotational velocity and specific shape. The high speed at which the blades spin creates a significant amount of lift, which, combined with the unique airfoil shape of the blades, can lead to the rapid formation of ice when flying in conditions where moisture is present. The airfoil shape creates a pressure difference that can lead to cooling of the surfaces, and when combined with humidity, this increases the likelihood of ice accumulating on the blades.

Icing can impact the aerodynamic performance of the blades, affecting lift and control, which is crucial for the safe operation of helicopters. Since helicopter blades operate differently from fixed-wing aircraft and are constantly exposed to airflow that can chill the surfaces, they can ice up quickly under the right environmental conditions, especially with their high rotational speed compounding the situation.