Because the aircraft's pressurization system works in combination with the air conditioning system, it's also continuously cycling that air through the cabin, recirculating some of it and venting the rest as it draws in fresh air from the engine compressor. Most airplanes will completely exchange the air inside the cabin in three to five minutes, according to Horning.
Airliners have to be careful to pressurize gradually as they ascend and depressurize just as gradually when they descend toward the destination airport, because humans are pretty sensitive to changes in air pressure — something anyone who's ever suffered from airplane ear already knows.
That's one reason why the air pressurization system has automated controls. As Horning explains, if the controller were to malfunction, the aircraft's pilot could manually depressurize the aircraft during the descent, but it might be an uncomfortable experience for passengers and crew, since it's tough to do it as deftly by hand. The air pressurization system also contains safety mechanisms designed to ward off mishaps.
The positive pressure release valve will pop open if inside pressure gets too high because too much air is being pumped in the cabin.
It will relieve that pressure. There's also the negative pressure valve, which protects the aircraft from the effects of a shift in which the outside pressure would become greater than inside the cabin. This might occur during a sudden descent, as Aerosavvy details. That's why that negative pressure relief valve is much more sensitive.
That's the negative pressure valve kicking in. Dehydration can increase when drinking alcohol. So, if passengers decide to drink on a fight, they should be sure to drink water and have something to eat as well.
Aircraft pressurization also reduces your sense of taste and smell. This is why extra spices or flavorings are often added to food on airplanes. You may ask yourself, why can't the plane simply fly lower to avoid the hassle of creating perfect aircraft cabin pressure? While airplanes can certainly fly below 10, feet where the atmospheric pressure is ideal, there are some operational drawbacks to doing this for an entire flight.
For one, there are many mountain ranges that are higher than 10, feet. In addition to this, most bad weather can be found at lower altitudes, so pilots typically want to avoid this. And in terms of efficiency, turbofan engines are extremely inefficient when used at lower altitudes and ground speeds. To ensure an airplane is safely pressurized prior to a flight, you'll need to test the pressure. To do this, make sure to use the proper airplane cabin pressure testing equipment.
These pieces of equipment are vital players in your GSE fleet and help to maintain the safety standards for any airplane coming to or leaving your airport. The following are just a few of the cabin pressure testing equipment options available from Tronair.
At Tronair, we work tirelessly to offer our customers a diverse and unparalleled selection of GSE products.
We understand how important safety is when it comes to aircraft pressurization and air travel overall — it's why we create testing equipment you can count on. Shop our high-quality selection of cabin pressure testing equipment, leak fluid dispensers and more. And being that humans have evolved on land, our lungs are designed to breathe this thin air.
If someone is forced to breathe the air at 30, feet, he or she may experience a medical condition known as hypoxia, which is characterized by lack of oxygen to the brain. By pressurizing the cabin, however, it creates a suitable environment with more oxygen, which is essential for our health and wellness.
The use a pressurized cabin is essential for creating a safe environment for passengers, but it does carry the risk of a blowout. If a window breaks or emergency door opens, everything will be sucked out as the pressure attempts to equalize. The highly pressurized air inside the cabin will travel outside of the airplane where the pressure is much lower. In many cases, the entire fuselage is pressurized, including the cargo hold.
This means all checked luggage and other cargo the plane is carrying is under the same pressure. By choosing I Accept , you consent to our use of cookies and other tracking technologies.
Reddit Pocket Flipboard Email. A Jet Airways cabin crew forgot to pressurize the cabin, resulting in passenger nosebleeds and ear pain. Getty Images The never-ending nightmare that is commercial flying just added a rather horrifying new potential mishap to its roster. How airplanes are pressurized All airplane cabins are pressurized to simulate the amount of pressure felt at 8, feet.
So what happens to your body when an airplane cabin is not pressurized? Next Up In The Goods. Delivered Fridays. Thanks for signing up! Check your inbox for a welcome email. Email required. By signing up, you agree to our Privacy Notice and European users agree to the data transfer policy.
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