Have you ever wondered why airplane windows are round and not square or even triangular? Aircraft engineers invented this form of windows for a reason. What for? We tell in the material “DIP”.
The windows of the first planes were square, like windows in houses. But then in the 50s of the last century, there was a plane crash. The aircraft called “Comet” broke up right in the air. Within a few months, depressurization occurred in two more liners, after which the engineers began to conduct thorough research and testing. Because the speed and altitude of flights increased significantly with the development of aircraft construction and the invention of jet engines, aircraft hulls began to experience higher loads, and metal began to wear out faster. The depressurization occurred in the corner of the porthole, as it was subjected to strong pressure.
To ensure an even distribution of the load in the form of temperature and pressure drops, aircraft engineers came up with the idea of making windows rounded. How does it work?
When an airplane takes off, the outside pressure drops faster than the inside pressure. This causes the body to expand and creates tension that builds up. Square portholes do not transmit voltage but increase it in places of sharp changes in shape. It concentrates in the corners, thereby provoking the appearance of cracks on the body. Rounded windows allow tension to pass quickly, without obstruction. It changes direction and increases pressure.
For the same reason, all the bearing parts of the hull, doors, and hatches are rounded.