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Why do plane-windows have a small hole?

Have you noticed it?

Exploring Greece TV by Exploring Greece TV
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Making a trip by planemany passengers choose to sit by the window rather than the corridor. The view offered by the planes from above is definitely unique especially if you pass over certain places.

That’s why most people choose to sit next to the window. If you belong to the category of those who choose the window seat, when you travel by plane, have you noticed the little hole that exists there? Probably not. It’s a very, very small hole. Despite this, its small size is very important for flight safety.

Next time just notice this simple window of the passenger’s cabin. In fact, you’ll see it’s made up of three layers. In fact, they are usually made of acrylic. The interior window layer on planes, sometimes called ‘section zero’, is simply put there to protect the next one. The next one is the middle layer, where there’s this little hole. This is also called a “ventilation hole”At the end is the outer layer which is the most important. Why is that? As an aircraft climbs, the air pressure in the cabin increases. At the same time, the compression system of the plane keeps the cabin pressure at a comfortable and safe level. What’s that supposed to mean? That the pressure inside the aircraft during flight is typically much greater than the pressure outside.

Why seats on planes are almost always blue

Essentially, the two exterior windows of the planes are designed to withstand this pressure difference between the cabin and the external atmosphere.

Why is there this hole in the windows on the plane-windows?

The purpose of this small ventilation hole in the “middle layer” is to allow the pressure to balance between the cabin and the gap between the two windows (internal and external). Thus, the cabin pressure on planes during flight is applied only to the outer layer.

There is also another function of the hole in the plane-windows: To release moisture from the air gap and prevent frost from forming in the window or even blurring it.

External photography source: pexels.com

Why do planes have no other colour than white?
Tags: aircrafts
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