EMERGENCY OXYGEN system for PASSENGERS! Explained by CAPTAIN JOE

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Dear friends and followers welcome back to my channel and to a great video about the emergency oxygen system for passengers on jet airliners.

We´ll be looking at, why you have to pull on the lanyard before placing the mask over mouth and nose and how the oxygen is generated.

Source Wikipedia:

Aircraft emergency oxygen systems are emergency equipment fitted to pressurized commercial aircraft, intended for use when the cabin pressurisation system has failed and the cabin altitude has climbed above a safe level. It consists of a number of individual yellow oxygen masks stored in compartments near passenger seats and near areas like lavatories and galleys, and an oxygen source, like a centralized gaseous cylinder or a decentralized chemical oxygen generator.

Most commercial aircraft that operate at high flight altitudes are pressurized at a maximum cabin altitude of approximately 8,000 feet. On most pressurized aircraft, if cabin pressurization is lost when the cabin altitude is above 14,000 feet, compartments containing the oxygen masks will open automatically, either above or in front of the passenger and crew seats, and the oxygen masks will drop down in front of the passenger. Oxygen masks may also drop on extremely rough landings or during severe turbulence if the oxygen mask panel becomes loose. Rows of seats typically have an extra mask (e.g. 3 seats, 4 masks), in case someone has an infant in their lap, or someone in the aisle needs to grab one.

An oxygen mask consists of a yellow, soft, silicone facial cup with white elastic bands for securing the mask to the passenger's face. This band is adjustable by pulling two ends looped through the facial cup. The mask may also have a concentrator or re-breather bag that may or may not inflate depending on the cabin altitude, which has (in some instances) made passengers nervous the mask was not providing adequate oxygen, causing some to remove them, who thereby suffered hypoxia. All airlines now make a point in the safety video or demonstration to point out that the bag may not inflate. The bag is attached to a tube, connected to the oxygen source in the compartment, allowing for it to drop down and hang in front of the passengers. To operate on all aircraft except the L-1011 and B787, they must be pulled sharply toward the passenger who needs it to un-clip the flow pin and starts the process of transporting the oxygen to the passenger. Passenger oxygen masks cannot deliver enough oxygen for sustained periods at high altitudes. This is why the flight crew needs to place the aircraft in a controlled emergency descent to a lower altitude where it is possible to breathe without emergency oxygen. While the masks are being used, passengers are not allowed to leave their seat for any reason until it is safe to breathe without the emergency oxygen. If there is a fire on board the aircraft, masks are not deployed, as the production of oxygen may further fuel the fire.

Aircraft safety cards and in-flight safety demonstrations shown at the beginning of each flight explain the location and use of oxygen masks.

Some aircraft, such as the SAAB Series Aircraft and the 1900D, have a mask system where either a mask is stored under the seat or is distributed by the cabin attendant. These masks are removed from packaging and plugged into the socket for oxygen supply.

On the B787 Dreamliner, oxygen masks only consist of the bag and tube. Passengers breathe into the mask to start oxygen flow, and in some cases, there are no side straps, as the mask adjusts automatically.

Big thank you to all other youtubers who provided me with the video material to create this video. Your content is highly appreciated. Please follow their channels:

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[LordBaldur]

There is a minimum of two oxygen bags in each lavatory? Sounds like engineers planned for people being in the mile high club.

[Mikesman]

Ehh... my mask isnt comfortable, I want to see the manager.

[charlesrogan]

Thanks YouTube, I really needed to watch this at 12:30 AM

[ThShrike]

Pulling out can also save a life... from alot of stress

[AkiGames]

Also it's important to put your mask on first and then help others because at those altitudes you can pass out within seconds or get hypoxia. So don't be the hero and put your mask on before helping others.

[soremakes]

Hey, where is the hump on your plane logo? Time to update it ahah, you’re a 747 pilot now

[-.._.-_...-_.._-..__..._.-.-.-]

I would be afraid to pull the hose out of its socket. How much force can they take?

[AluminumOxide]

Perfect guy to use in an aeronautical engineering university course!

[sophiacarlisle]

Pardon the pun but your video about the emergency oxygen system is like a breath of fresh air 😃. I definitely enjoyed learning about this important system since it is always good to know how to use it, and to understand how it works :) . I am a “newbie” passenger so I have not really flown that much but learning about this takes the fear element out of flying more than 15, 000 feet above the ground :) .

[AviatorInspirations]

Fun video Joe! Most people don’t even listen to the flight attendants during their briefing, so hopefully more people will remember the great information in your video. Great job covering such an important topic 👌🏻!

[tigerrx]

In all my years of flying, this is the most informative pre-flight briefing I’ve ever heard. You saved my life joe.

[ziaurkhan]

Sounded like 'Dutch Pilot Girl' doing the PA voice 🎤

[joekelly]

I studied chemistry in high school and I understand the reaction taking place, I just have a hard time wrapping my brain around a reasonably hot exothermic reaction producing oxygen without simultaneously setting everything else on fire. Kudos to the engineers who designed this system!

[JustAGuyWithALongScreenName]

We used to use a similar thing on US submarines. When oxygen gets low, and for some reason we cannot take in fresh air, or if the o2 generator goes down, theres oxygen candles we can burn for oxygen. There was also a naval firefighting device called an OBA (oxygen breathing apparatus) used to provide o2 during emergencies. Same idea. A canister the insights to create oxygen. Damn thing sucked because it was worn on the chest. Thanks for bringing back memories of the boat Captain Joe.

[Adeishvili]

10:55 Actually none of them is wearing mask in a proper way :D

[hoofed]

11:09 Whoops. Those black bars disappeared on the final frame.

[عمرالتعليمية-ند]

I didn't know i have to pull lanyard, I thought it's that detailed, elaborate emergency instruction and procedure!

[LEGEND-kbid]

Just right now I was studying cabin atmosphere control systems ( jeppesen airframe book) and ur alert for this video came up .and it’s so much easier when I can have visual experience from the video.
Thank you
Please keep them rolling.
Big fan...

[paulfaulkner]

Love you and Mentour - both really explanatory

[davidvanallen]

Great video Joe, you have a great way of explaining things. As both a pilot and a paramedic, I’d like to clear up one point. You said that at FL180 “there is only half the amount of oxygen left in the air” compared to sea level. To be precise there is still nearly exactly the same amount of O2, 21%, in the air at that altitude and even much higher. The partial pressure of the O2 compared with the other gasses present is what is lowered at you ascend.

This means that the lungs cannot absorb the oxygen as efficiently at higher altitudes and you will start to become hypoxic. Your body will stop functioning correctly (and very quickly at higher flight levels) unless you correct for this. Two ways to correct: increase the pressure of the gasses by pressurizing the cabin (the normal way of doing things) OR, increase the just the oxygen gas pressure by changing its concentration. The latter being easily accomplished through the supplemental chemical O2 mask system or by the use of bottled 100% O2. I think we thank Boyle’s Law for this. :-)