These results are old because they're from the time I had a tour through the aeronautical research laboratories in Melbourne, Australia. However, The wings of

These results are old because they're from the time I had a tour through the aeronautical research laboratories in Melbourne, Australia. However, The wings of a boeing 727 flex about 8 inches in each direction in normal flight. In tests to destruction they were flexed repeatedly to nearly 8 feet in each direction before they showed any visible signs of distress, finally failing after 13 hours constant flexing at 8'4" in each direction. I'm not suggesting I wouldn't be terrified in a major storm, but I felt a lot safer in flight after that. Aircraft wings are amazingly flexible and robust.