747 wing flexibility

Date:         02 Sep 98 01:08:05 
From:         markwrk@aol.com (MARKWRK)
Organization: AOL http://www.aol.com
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I heard once that a 747 wing is designed to flex in turbulence up to 6
feet at the tip (3 feet up, 3 feet down). Does anyone know if this is
correct and where I might find the facts on this. I checked the Boeing
site and was unable to find anything.