Characterization of Aircraft Icing Environments with Supercooled Large Drops for Application to Commercial Aircraft Certification

AbstractObservations of aircraft icing environments that included supercooled large drops (SLD) greater than 100 μm in diameter have been analyzed. The observations were collected by instrumented research aircraft from 134 flights during six field programs in three different geographic regions of North America. The research aircraft were specifically instrumented to accurately measure the microphysics characteristics of SLD conditions. In total 2444 SLD icing environments were observed at 3-km resolution. Each observation had an average liquid water content (LWC) > 0.005 g m−3, drops > 100 μm in diameter, ice crystal concentrations 500 μm in diameter, each with median drop volume diameters 40 μm. For each SLD subset, the observations were used to develop envelop...

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