Originally Posted by
FlyingUnderTheRadar
BTW If you are concerned with material flex in the transportation world - worry about bridges. Something like 10% of the bridges in USA are structurally deficient.
I completely agree, and actually when I am walking across bridges, as I do sometimes, I have the same effect. As for the wings on the planes, clearly they can take a lot, so logically it never worries me, but some part of me would like them to look perfectly pristine.