Aviation Stack Exchange
Aviation Stack Exchange

Questions tagged [cabin-pressure]

Airplane cabins are pressurized so that the air inside remains breathable at high altitudes.

154 questions
31
votes
1 answer

Why is cabin pressure increased above ambient pressure on the ground?

As far as I know at least some (e.g. some Bombardier Dash-8 series) airplanes during takeoff may increase cabin pressure above air pressure on the ground, before starting to decrease it. In one case pressure was increased to around 760 mm Hg (1013…
DavisNT
  • 411
  • 4
  • 5
18
votes
2 answers

Can you get sucked out of a hole in an aircraft?

I had always been under the impression that the forces of air rushing out a broken window or hole in an airplane would be pretty limited and nothing near the levels necessary to carry a body through to the outside. The scene in Goldfinger has always…
Tyler Durden
  • 13,282
  • 4
  • 43
  • 67
16
votes
1 answer

How is the cabin pressure maintained inside aircraft?

When aircraft is at high altitude, atmospheric pressure will be too low but inside aircraft pressure is maintained such that it is comfortable for crew and passengers. But how is it maintained? As I understand that at higher altitude pressure…
ToUsIf
  • 1,143
  • 3
  • 16
  • 22
15
votes
7 answers

Is it true that a soda can or a bag of chips will pop in a plane at high altitude?

I've heard some conspiracy theorists claim that if you were to bring a soda can or a bad of chips onto an airplane, they would pop? Is this true? If so, why?
user26445
12
votes
3 answers

What's the relation between cabin pressure and altitude?

Usually, cabin pressure of an airliner is kept at a value corresponding to an altitude of not more than about 2000m. Now, I heard that before takeoff, the pressure is already increased a little for higher stability of the fuselage. Maybe, this is…
sweber
  • 7,257
  • 1
  • 35
  • 51
11
votes
4 answers

Why aren't aircraft cabins pressurized to sea level pressure?

From an article on WHO's website: Although aircraft cabins are pressurized, cabin air pressure at cruising altitude is lower than air pressure at sea level. At typical cruising altitudes in the range 11 000–12 200 m (36 000–40 000 feet), air…
William R. Ebenezer
  • 493
  • 3
  • 17
9
votes
2 answers

Is the Diamond DA62 pressurized?

In a recent conversation about the Diamond DA62 I was speaking with someone who thought the aircraft was pressurized. I was shocked considering the door design. Shocked to the point of disbelief. A quick Google search referencing the following page…
ryan1618
  • 14,900
  • 31
  • 102
  • 187
9
votes
2 answers

To what extent does pressurisation increase the rigidity of an airframe?

A vessel such as a balloon or the rubber air-cell of an inflatable boat will become more rigid when pressurised. The same must happen to the fuselage of a pressurised aircraft - but to what extent? Unlike balloons and inflatable boats, aircraft are…
Daniele Procida
  • 12,858
  • 2
  • 51
  • 94
9
votes
2 answers

Has the typical cabin pressure in airliners changed in recent decades?

Two or three decades ago, I would experience quite uncomfortable blocking of the eustachian tubes, which would noisily unblock and become blocked once more as the plane descended. I haven't experienced that in recent years, in which I have been…
Daniele Procida
  • 12,858
  • 2
  • 51
  • 94
9
votes
3 answers

How do door seals work?

The pressurization in the cabin requires the doors have their seals working properly. How do they prevent pressurized air from leaking from the doors?
eduardoguilherme
  • 3,158
  • 5
  • 25
  • 46
5
votes
1 answer

Is there good information available on maximum operating altitudes whilst maintaining a sea level cabin?

I am in the process of reviewing the aircraft we regularly commission for air ambulance transfers. Although the majority of transfers are undertaken with a standard cabin altitude ( 4 - 8,000 ft) some are conducted with a sea level cabin (or cabin…
gtothill
  • 81
  • 3
3
votes
1 answer

If an aircraft decompresses at altitude will everyone start farting?

From what I understand about how gases and liquids work, if the environment loses pressure, then it causes dissolved gases to come out of solution. For example, if a diver ascends too quickly, dissolved nitrogen will come out of solution causing the…
Tyler Durden
  • 13,282
  • 4
  • 43
  • 67
3
votes
3 answers

What's the difference between positive and negative pressure relief valves?

In cabin pressurisation systems, I thought that the negative relief valve is automatically opened if outside pressure becomes greater than inside pressure.
hic
  • 31
  • 1
  • 1
  • 2
2
votes
2 answers

How can I calculate the cabin pressure following a decompression?

What are the calculations to determine the level of cabin pressure at a given altitude once the cabin is punctured? I was unable to determine the window size and the flow rate of the compression system on the recent Southwest accident aircraft, for…
jCisco
  • 1,058
  • 8
  • 24
2
votes
3 answers

How does the outflow valve work on a cabin pressurization system?

When you fill up a cabin with warm air the pressure of the cabin will rise. An outflow valve controls the desired pressure. But with pressure rising doesn't the temperature rise because you're compressing air into a space? Is this why the outflow…
Itzyoboi
  • 721
  • 2
  • 10
  • 21
1
2