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Why is an airplane pressurized?

Updated: 9/13/2023
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6y ago

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The higher you go, the "thinner the air" - the less oxygen in the air. When you get to around 11,000 msl (mean sea level) there is not enough oxygen in the air to keep your brain functioning normally. You start to suffer from Hypoxia and a whole list of other ailments that are not particularly good for you. As you go higher, and the oxygen in the air becomes less and less, you starve the brain of oxygen and eventually kill it - not good. You can solve the problem by donning an oxygen mask - that supplies you with a supplemental oxygen source, or you can pressurize the aircraft, that virtually brings the oxygen in the plane to a level which is somewhere generally between 4,000ft and 8,900ft msl. It's much more comfortable (and practical) for airlines to pressurize the airplane than to have 150 to - what - say 300 oxygen masks hanging down from the ceiling at every seat.

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Q: Why is an airplane pressurized?
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Continue Learning about Physics

When you are landing in an airplane does the air pressure increase or decrease?

It increases. In an unpressurized airplane, the pressure increases because the air is denser at lower altitudes. In a pressurized airplane, the pressure increases both because the pressure must be equalized before the doors can open and because the hull is not designed to withstand an outside pressure higher than the inside pressure.


Why does a helium balloon pop as it goes higher in the sky?

a helium balloon pops as it goes higher because the different combination of pressure. you could take a balloon in an airplane because the cabin is pressurized. as it gets higher the amount of pressure changes so it pops the balloon.


Is air pressure higher or lower when you are flying inside of an airplane?

Air pressure is always higher inside a pressurized airplane and about the same in an unpressurized one. As altitude increases, air pressure drops which results in less oxygen passing through the lungs and entering the bloodstream, hence the need to increase the proportion of oxygen or the pressure to be able to breathe. Federal Air Regulations require the use of either a pressurized cabin or the use of supplemental oxygen above certain altitudes. In addition to the lack of oxygen, there's the problem with loss of pressure at very high altitudes that could result in the formation of nitrogen bubbles within the blood and tissues. High altitude aircraft like the SR-71 Blackbird or the X-15 use fully pressurized suits for the pilots rather than have to pressurize the whole aircraft.


Do you weigh less in an airplane or on a mountaintop?

in an airplane


How can you calculate the acceleration of a commercial airplane?

you can caculate the acceleration of a commercial airplane when the airplane slows down

Related questions

What happens if an airplane is not pressurized?

death happens if the airplane is over 20000 feet


Why are airplane cabins pressurized?

Airplane cabins are pressurized because humans cannot breath at a very high elevation.Aircraft are pressurized to allow them to fly higher. Without pressurization, the amount of oxygen in the air would not be sufficient for humans to breathe.


Is packing soda on an airplane possible?

yes, the cabin and cargo holds are pressurized.


Do beer cans explode on an airplane?

nope, the luggage compartment as well as the cabin are both pressurized.


Can you boil water on a airplane?

Yes. Airplane cabins are usually pressurized to around 5,000 feet. So imagine you are just boiling water at 5,000 feet.


What aircraft can fly in the thermosphere?

Jet or rocket powered, with a pressurized cabin.


What is the oxygen level of the air expected to be when flying in a pressurized cabin of a plane?

The percentage of Oxygen in the air is the same in airplane as it is outside the airplane. The only difference is the pressure levels. If the pressure drops too much then the total amount of Oxygen will be insufficient for you to breath and you will pass out. The airplane only carries oxygen for use in emergency and is dispensed in the oxygen masks of the crew and passengers. Maybe your Question is asking what the total volume of oxygen is available in a pressurized airplane. I don't know that.


Why is an airplane cabin air pressurized?

At altitudes above 10,000 feet there is not enough air for humans to breathe. Aircraft cabins are pressurized so the pressure is equal to that at about 7,000 feet. Commercial airliners fly at altitudes up to 40,000 feet.


What kind of license do you need to drive an airplane?

Typically, operating an airplane is called "flying" and it requires a private pilot license (at minimum) from the FAA. - - - - - It depends on the kind of airplane it is, and what you plan to do with it. The licenses and certificates you need to fly a Piper Cherokee (single-engine piston airplane that isn't pressurized) are far different from what you need to fly a 747.


Is the air pressure in a flying airplane greater that outside the flying airplane?

In a commercial airliner flying at cruising altitude, the air pressure inside the airplane is considerably higher than the air pressure outside. The air pressure outside is too low for people to breathe comfortably, so the interior is pressurized.


Why does the word pressurized mean that a crew cabin is filled with air?

If the crew cabin were not pressurized, it would still be full of air, except that the air would be at the same pressure as the air outside. Only if the craft is actually in outer space would there be no air outside. In the case of an airplane, there has to be air outside in order for the airplane to fly, but that does not mean that there is enough air to breathe. Pressurizing the cabin means that the air is at a sufficient pressure to be breathable.


When you are landing in an airplane does the air pressure increase or decrease?

It increases. In an unpressurized airplane, the pressure increases because the air is denser at lower altitudes. In a pressurized airplane, the pressure increases both because the pressure must be equalized before the doors can open and because the hull is not designed to withstand an outside pressure higher than the inside pressure.