Nowadays, airplanes have become one of the preferred modes of transportation for comfort, convenience and time saving, but do you know that there are many truths hidden in airplanes that we don't know!

Today, I brought 17 cold knowledge you didn't know on the plane:

1. Story behind the oxygen mask

When the oxygen mask falls, oxygen can only be maintained for about 15 minutes from the moment the oxygen mask is pulled down, but this time is enough for the pilot to take the plane to a lower altitude, so that we can breathe normally. More importantly, once the cabin is short of oxygen, you only have 1.5 to 21 seconds to wake up. At this time, you should put on an oxygen mask for yourself first, and then put it on the children around you, because it doesn't matter if the children faint for a few seconds, but if you also faint, it will be a big deal.

2. The real reason why the plane lights up in the cabin when it lands

The real reason why the plane lights up in the dark cabin when it lands at night is that at this time, you have adapted to the dark cabin environment, and in case you need to evacuate the cabin urgently, you can let your eyes adapt to the external brightness first.

3. About the catering on the plane

The two pilots ate different foods and could not share them with each other, in order to prevent poisoning incidents.

4. Take your pet on the plane

When the plane starts to operate normally, some things are inevitable, such as loud noise from the tarmac. Imagine that your pet is waiting to board the plane on the tarmac. They are subject to the same noise as the ground crew, but they are not protected by earmuffs. So please think twice about whether to bring your pets before flying.

5. The toilet can be opened from the outside

Turn on the no smoking sign on the door, and there is a hidden device to open the toilet door from the outside.

6. The water in the bathroom is really disgusting

Whatever you do, don't drink the water there and don't "wash your hands" in it. Because there is a certain interval to clean the water tank.

7. Lock the suitcase

Remember to lock the checked suitcase. Including the luggage to take on the plane, because in case you are asked to check it at the boarding gate, fellow passengers or apron staff will have the opportunity to contact your bag.

8. How will the luggage be handled during transportation?

If you say these things are "fragile", then they will be thrown even worse; If you say "face up", then they will undoubtedly be put upside down. To fill a small warehouse with more than 111 suitcases and goods, it's up to you what to think and how to put them. Unless there is a luggage labeled "I love baggage handlers".

9. How do pilots land

In bad weather, it may not mean that pilots are not skilled, but that they did it on purpose. If the runway is full of water, it can pierce the water layer and prevent the wheels from slipping.

11. The behind-the-scenes truth of turning off electronic equipment

Mobile electronic equipment will not harm the aircraft itself, but it will affect the pilot. Imagine how annoying it is for the pilot sitting in the cockpit to be disturbed by more than 111 cell phone signals when the plane is about to land at its destination.

11, a small loophole that can exempt you from paying the baggage fee

You can only check your baggage at the boarding gate (unless the baggage is unusually large). You can take two larger hand luggage and ask them to check one of them at the boarding gate. This way you don't have to pay more for luggage.

12. Most airplanes will carry human organs

13. It is difficult to fly in hot season.

In hot season, the staff have to unload more cargo, because it is more difficult for airplanes to take off in thin air.

14. Reasons for placing ashtrays in toilets

Although the FAA banned smoking on airplanes many years ago, there are still special ashtrays in toilets. The real reason is: in case passengers really can't help hiding in the toilet, it's better than throwing cigarette butts elsewhere.

15. How to tell the ground if the plane is hijacked

If the plane is hijacked, the pilot will keep his wings up when descending to slow down the flight speed, and at the same time hint to the ground crew that something has happened on the plane and needs help.

16, the plane can glide for a long time without the engine

So you can take a good look when you fly next time ~