An oscillation builds up in the wing span to the point where the wing self destructs. Here's an video example from the development of the 747: http://www.airs

An oscillation builds up in the wing span to the point where the wing self destructs. Here's an video example from the development of the 747: http://www.airspacemag.com/videos/category/flight-today/wing-flutter-on-a-747/ http://www.airspacemag.com/videos/category/flight-today/wing...