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 What If Your Airplane Door Burst Open Mid-Flight?
 이** (jean)



Flying may be more horrifying than you think. 



You're sitting on a plane trying to relax when a terrible thought crosses 

your mind: What would happen if that airplane door opened? 

Commercial airplanes pressurize their cabins to match the atmospheric pressure

of 8,000 to 10,000 feet above sea level, even though the cruising altitude of 

the plane you're in is 30,000 to 45,000 feet in the air. As altitude increases, 

atmospheric pressure decreases. This is due to Earth's gravitational pull on the 

air molecules in the atmosphere. The closer to the Earth's surface the stronger 

the force exerted on these molecules. If the door were opened the plane would 

depressurize in less than 0.5 seconds. Unless your seat belt is fastened you and 

any loose objects would immediately be ejected due to the difference in pressure.

During such a scenario survival rates are very slim given the possibility of the entire 

plane breaking apart. 

Because the air is substantially thinner at high altitudes there is substantially less 

oxygen. A gradual decompression in the cabin will cause the oxygen mask to drop

from above and on average you have 18 seconds to put the mask on before 

hypoxia kicks in. Hypoxia occurs when oxygen levels decrease, causing 

symptoms of nausea, dizziness and unconsciousness leading to death. 

The oxygen reserves on the plane would last for only 10 minutes.

Enough for the pilot to descend rapidly to 8,000 to 10,000 feet to match both 

the internal and external pressures and give you hope for survival. 

Freaked out yet? Don't worry, the chances of the door opening are so 

small because there's eight to ten pounds of pressure exerted on every 

square inch of the plane.Remember there's more pressure inside the cabin

than outside. Using the largest commercial airplane the Airbus A380 as an

example, the main door measures 4288 square inches, meaning a 38,592 

pounds of force would be required to even begin to open it.

To compare this would be equivalent of you trying to move 3 African bush 

elephants - the largest land mammals on earth.Additionally,

plane doors are almost always electronically locked by the pilot through functions

accessible only from inside the cockpit.And to ease your worries more: It would 

also be nearly impossible for someone to punch and break through an airplane 

window.These windows can also be made with up to six layers of various

types of strong polymers and are bulletproof.Furthermore, these windows 

are almost always rounded to decrease drag while in flight, thereby preventing 

cracks and decompression.You're more likely to die in a car than during aviation 

with a 1/114 chance of car accidents compared to 1/9821 for air travel 

related accidents. So fasten your seat belts, pay attention to your safety 

videos, and above all enjoy the flight.Thank you so much for watching!

Make sure you subscribe, because we make new science videos every

Thursday.And click the bell because apparently it does something.

If you want to watch more right now, we'll link a couple videos over 

here that you can check out to satisfy your science needs, 

Otherwise we'll see you next Thursday for a new video. Peace!



1. What would happen if that airplane door opened, as per the video? 

2. How dangerous do you think airplanes are? 

3. Do you ever get afraid when you are flying? How do you get over it?

2020-07-16 오후 1:16:38
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