If you’ve ever been in an airplane, you might’ve noticed that there’s a small hole in the bottom of your window. If you haven’t noticed it before, look for it next time; it’s on every plane. If you have noticed it before, you might have wondered whether it should be there and whether it was safe or not. The hole is actually an important component of the window, and contrary to what you might have thought it did, the hole actually helps the safety of the window. In this article, we will be discussing the function of the hole and what it actually does.

Flights within the earth are possible taking into account our atmosphere composed of air. But when talking about flying through outer space or even an almost non-existent atmosphere or one that is composed of other gases like the planets in our solar system, propulsion methods and flight dynamics of the vehicles will be significantly affected.