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In an emergency, this marking is essential for survivalDid you know? This is what the black triangle above the airplane window means
What does the little triangle above some airplane windows mean? We have the explanation.
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So what is that?
Observant airline passengers may have noticed: There is a small black triangle above some aircraft windows. But why was it placed there – pure coincidence? Rather not! We clarify.
There are many theories circulating about the triangles over airplane windows
There are many theories on the internet about the black triangles on airplanes. On Reddit For example, several users write that there is a predetermined breaking point there, while another speculates that it is simply a guide when assembling the aircraft. But far from it! In reality, the symbols serve as a guide for the flight crew and aircraft technicians.
Because you have the best view of the wings from the windows, which have a triangle turned downwards. This can be relevant for the crew during a flight as well as for technicians during maintenance.
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Technical defect or icing? You can see it best from here
When an aircraft is maintained, it is also checked whether the slats and landing flaps of the aircraft (slats and flaps) are functioning properly. To do this, the technicians must have the best possible view of the wings. And they get this from inside the aircraft, more precisely through the windows marked with a triangle.
In a similar case, the markings can also become useful during flight. Pilots make adjustments to the wings in various situations. During takeoff, for example, they extend the landing flaps, after takeoff they retract them and then extend them again for landing. Normally, such settings are indicated in the cockpit by switches or lights. But what if these displays are broken? Then it would have to be visually checked to see whether the flaps are in the desired position. And as already mentioned, the best view is from one of the marked windows.
But you can observe something else from the marked windows. Namely whether the aircraft's wings are icy and need to be de-iced. In winter it is common for ice to form on aircraft wings. However, since this would affect the aerodynamics of the aircraft, it must be removed before every takeoff.
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Two triangles in front of and two triangles behind the wing
In total you can find four of the triangles in question on a plane. There is one each on the left and right of a window IN FRONT of the wing and one each on the left and right of a window BEHIND the wing. From the front you have the best view of the slats, from the rear you have the best view of the flaps.
The markings save technicians and crews from having to count the windows every time to get the right one. Thanks to the triangles, you know at a glance where you have the best view of the wings.
Source used: Redditown RTL research
