I take exception to comments attributed to Boeing Vice President Jack Zerr in the article "Know Your COTS" (AW&ST Nov. 27, 2006, p. 78). It was stated that 737 blended winglets were magnets for ice buildup on long patrols in arctic regions. This statement is without basis in fact; extensive flight experience never has shown icing to be an issue for the 737-800 with blended winglets. Our analysis indicates that even in severe icing, the consequences of any ice buildup for performance ...


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