Почему у самолётов не делают прямоугольные окна?

[jayrandom]

Ну или вообще "угольные":

"The most notable lesson learned from the Comet disaster is that viewing windows are no longer designed square but with rounded edges to reduce any stress concentrations."

Comments

[aleatorius.livejournal.com]

"For this reason the FAIL-SAFE design philosophy was developed in the late 1950’s. All materials are assumed to contain a finite initial defect size before entering service that may grow due to fatigue loading in-service"

тоже прикольно