Why the windows of airplane are oval?
There are many things around us that we pass them simply. For example, one of these cases is the oval windows in the airplane. Have you ever posed this questioned why are all windows of planes as oval-shaped? First, it should be noted that the window of airplane was not oval from the first day and the primary airplanes also enjoyed of rectangular windows. By increasing the development of aviation industry, for some reason engineers had preferred to fly planes at higher altitudes. One of these reasons is reduction of the created turbulence in the high altitude and a point in atmospheric that density is very low. Also the friction generated at high altitude is also very limited, which this issue reduces the fuel consumption. Considering the dilution of the air in the atmosphere, engineers must control inside the plane with more pressure to passengers sit in the cabin with comfort. The cabin due to more pressure in inside than outside, should be in the form of cylindrical and this causes