Planes are ridiculously over designed in the name of safety..
[here](https://youtu.be/K2QoanZq2jE?si=wlj_SFzNgT4Uefjq) you can see a Boeing 777 wing flex test, it goes to exactly 154% of the most extreme possible conditions before breaking.
Exactly as the calculated it to be.
Above and beyond, in the name of safety.
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