After 26 years with @southwestair and being among the original SWA pilots at the MCO base, Pilot Frank Gaines has accepted a job spending some quality time with his grandkiddos. Happy retirement, Captain! 👨✈️
Whether you're flying a Piper Warrior or a Boeing 757, aircraft icing is a big hazard.
Icing Problem #1: You Stall At A Lower Angle-Of-Attack
Ice adversely affects your wing's lift coefficient. According to the FAA's Flight In Icing Guide, the "Maximum Coefficient of Lift (CLmax) is significantly reduced by the ice, and the Angle of Attack (AOA) at which a stall occurs (the stall angle) is much lower with ice than without ice.
Icing Problem #2: Drag Significantly Increases
Even at very low AOAs, ice has a significant impact on the drag coefficient of an airfoil.
As ice accumulates on your wing, drag steadily increases. An airfoil drag increase of 100 percent is not unusual, and for large-horn ice accretions, the increase can be 200 percent or even higher.
Effects Of Icing On Roll Control
Ice on your wings forward of the ailerons can dramatically affect roll control as well.
Why? Most wing tips are thinner than the root of the wing, making them more efficient at collecting ice. This can lead to a partial stall of the wings at the tips, which affects roll control. As airflow is separated around the wing, control surfaces lose effectiveness because they're no longer flying in undisturbed airflow.
You've Slowed Down For Final Approach... Ice that had little effect on your aircraft during the approach, could have a significant effect on your stalling AOA and airspeed as you approach the runway threshold.
The problem? You'll stall at a lower AOA and a higher airspeed. Even a thin layer of ice at the leading edge of a wing, especially if it is rough, can have a significant effect on stall speed as you approach the runway threshold and flare to land. ➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖