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As an airplane increases altitude pressure drops. Now if u ask why pressure drops because temperature is high near the surface of the earth. Now according to Charles law we know that volume is inversely proportional to the temperature . So as the aircraft increases there air density also decreases so there is a lack of temperature and pressure. .
Now a aircraft flies at altitudes around 35000-40000ft for efficiency reasons (airdrag is less) According to the graph air pressure reaches around 7psi. If a person breathes air at that temperature a person at 25,000 ft. for 5 minutes where the blood saturation is down to 55 to 50% will cause unconsciousness and death ultimately.
Even though the need of pressurisation of aircraft is inevitable at high altitudes still we cant keep it at 14.7 psi(sea level conditions) because of structural limitation. Maximum differntial mode pressure is 3 psi so the aircraft is kept at 10 psi at high altitude's. I tried my best to answer within this short time Hope that answer's your question. Fell free to ask any more questions for further clarity.
Alam
Aerospace engineer
tauhid1987@gmail.com
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∙ 13y ago
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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.
