Response of a Research Aircraft to Icing and Evaluation of Severity Indices

摘要: The relationship between four atmospheric parameters and three measures of flight degradation are investigated using data from an instrumented research aircraft. Data flights that took place in wintertime stratus clouds over northeastern Colorado emphasized; additional points encounters with large supercooled droplets northern California Arizona included. maximum decrease coefficient lift due to icing was 35%, 68% cases within 10% the uniced aircraft value. Coefficient drag increased by up 230% as a result climb capability reduced 6.9 m/s. Greater performance loss related higher liquid water content, median volume diameter, potential accumulation ice. A combination content > 0.2 g/m3, diameter 30 /un, temperature — 10°C responsible for largest decreases. Severity indices were dependent on droplet tested. An index takes into account effects provided best relation severity level degradation.