Aircraft icing penetration

By using our site, you acknowledge that you have read and understand our Cookie Policy , Privacy Policy , and our Terms of Service. Aviation Stack Exchange is a question and answer site for aircraft pilots, mechanics, and enthusiasts. It only takes a minute to sign up. The most obvious answer is to stay out of it in the first place, but the reg requires us to come up with an answer The obvious answer you mentioned should be reiterated: Avoid thunderstorms whenever possible!

These liquid water droplets continue to fall into a layer of air that is at or below freezing. In some cases, the droplets will freeze to form ice pellets, which may be observed at the surface This can occur at any altitude but generally do not persist for greater than 3, feet in depth Collision-coalescence Process: Collision-coalescence tends to form freezing drizzle as droplets collide within the cloud and coalesce into larger droplets This process is more likely to occur with relatively warm, low altitude clouds. The conditions are specified in terms of altitude, temperature, liquid water content LWC , representative droplet size mean effective drop diameter [MED] , and cloud horizontal extent Forecast Icing Conditions: Environmental conditions expected by a National Weather Service or an FAA-approved weather provider to be conducive to the formation of in-flight icing on aircraft Freezing Drizzle FZDZ : Drizzle is precipitation at ground level or aloft in the form of liquid water drops which have diameters less than 0. Cloud droplets diameter greater than 0. Supercooled drops are found in clouds, freezing drizzle, and freezing rain in the atmosphere.

These liquid water droplets continue to fall into a layer of air that is at or below freezing. In some cases, the droplets will freeze to form ice pellets, which may be observed at the surface This can occur at any altitude but generally do not persist for greater than 3, feet in depth Collision-coalescence Process: Collision-coalescence tends to form freezing drizzle as droplets collide within the cloud and coalesce into larger droplets This process is more likely to occur with relatively warm, low altitude clouds. The conditions are specified in terms of altitude, temperature, liquid water content LWC , representative droplet size mean effective drop diameter [MED] , and cloud horizontal extent Forecast Icing Conditions: Environmental conditions expected by a National Weather Service or an FAA-approved weather provider to be conducive to the formation of in-flight icing on aircraft Freezing Drizzle FZDZ : Drizzle is precipitation at ground level or aloft in the form of liquid water drops which have diameters less than 0.

Check the de-icing and anti-icing capabilities at airports where you may encounter these conditions. Hoar frost appears as a thin , uniform deposit of ice with a fine, white, crystalline texture. It will need to be removed prior to flight, but will not reform.