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Why Plane Windows Are Round

Tragedies that changed plane windows

HAVE you ever wondered by the plane window is round, rather than square? There's a good reason for it, and we had to find out the hard way. Ref. Source 9p.

Round Windows Plane Why

I kind of figured that it would have to do with a lot of undo stress on a sharp corner at low pressure outside and high pressure inside. Thus we have curved windows in planes. I think it does not take much though in physics to understand the forces and metal stress to keep people safe.