Publish Time:2018-01-10 15:25:03Source:Airchina
【Introduction】:When you take an airplane, have you ever notice that the windows are elliptical and not any other shapes? If you look carefully, you will find a tiny air hole in the window, do you know what it is used for? Do you know why, when the sky turns dark, the stewardess will dim the light no matter if you want to sleep or not?
When you take an airplane, have you ever notice that the windows are elliptical and not any other shapes? If you look carefully, you will find a tiny air hole in the window, do you know what it is used for? Do you know why, when the sky turns dark, the stewardess will dim the light no matter if you want to sleep or not?
These are the details of taking an airplane trip, and none of them are meaningless.
Today we are going to answer these questions.
1. Why aren’t the windows on the plane square?
As the altitude increases, the cabin need to increase pressure to keep the inside atmosphere comfortable. The high pressure will act on the window. The square window has less structural stability with more pressure centered on the angles. Circles, however, exert the same amount of pressure in all directions, which spreads the pressure and allow a safer environment.
2. What is the function of the tiny air hole inn the window?
When flying at a high altitude in the sky, the outside pressure is very high. In order to balance the difference in pressure between the cabin and outside, the air hole in the inside window allows the pressure to be exerted on the outside window during the flight.
3. Why do stewardesses dim the lights when flying at night?
People always feel that the stewardess dim the light to make passengers sleep well. But the real intention to dim the light when landing at night is to make passengers’ eyes adapted to the light when getting off the plane.
4. Why are the aircraft tray tables slanted?
Though the tray tables are little bit inclined to the seat, food on the table is more stable. It is because during the flight, the plane will be traveling at a slight incline, meanwhile the aircraft tray tables need to be slanted down a little toward the seats.
5. Do you know why the windows on the plane couldn’t be opened?
It is because that when the plane is at ten thousand meters high in the sky, the pressure in the air will be only 30% compare to the sea level with an extremely low temperature. For the comfort of passengers, the windows on the plane are designed to fully contain the increase in cabin pressure.
6. Why is there discomfort in my ears when the airplane ascending?
As the height increased, the cabin pressure will decrease. Relatively, the pressure inside human body will be higher than the cabin pressure. The inner ear tissue couldn’t adapt to the pressure change so quickly, so it will be blocked for a while.
7. Why airplanes take off and land against the wind?
It is because that when flying against the wind, airplanes gained more lift than breezeless or tailwind. It can shorten the distance when taking off and decrease the speed when landing.
8. Why are most of the planes painted white?
Because white can reflect any band of light, which can prevent light transfer into heat, so that it will be safer.
9. What are the small rods located at end the wings? What is it used for?
The little rods on the wings are static dischargers and they release the static electricity from the surface of aircraft and prevent the communication system from jamming.
10. What’s inside the nose of a plane?
The scientific name for nose of a plane is radome which is placed in the forefront of a plane to protect the radar antenna and components. Its shape is designed to be aerodynamic and also resist damage from high speed air, rain drops, hailstone, and birds.
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