How airplane pressurization systems work (and how to control them)
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- เผยแพร่เมื่อ 13 มิ.ย. 2023
- High-performance airplanes and jets incorporate a pressurization system to provide a comfortable cabin environment for the flight crew and passengers.
In this video, we'll show how this system works in piston engine airplanes, like a Piper Malibu, and how the pilot controls the system.
This video tip is from Sporty's Commercial Pilot Training Course.
Shop: www.sportys.com/commercial-pi... - วิทยาศาสตร์และเทคโนโลยี
You did a tremendous job of explaining this!
i thought it was an AI TTS ?
@@TheFalseShepphard its not
Perfectly explained, wonderfully demonstrated. Couldnt be more inpressed.
Ill choose Sporty's for my ground school, for sure.😮
Congratulations for your straightforward explanation.
I had a random question thought. You answered it . YT is awesome for that in a awesome way.
Hugely helpful explanation! Thanks Sporty's.
Very well explained! Thanks for the video!
Aircraft environmental control systems is what I do for a living. This video explains very well, can you imagine what the system look like for Airbus A380 with that many passengers?
Great video. Thanks.
That plane is an authentic beauty
Thank you
Very nice video explaining the basics of pressurized cabins. So what happens if the pressure from the turbo is not high enough, say in decent when the pilot reduces manifold pressure? Will the cabin loose pressure? I would have loved the video to include common issues of pressurized cabins in piston aircraft. The Malibu for example has a low vno and for a safe decent you have to reduce the manifold to stay on the safe side, I have heard often, that the cabin then looses pressurization.
So typically the turbo still spins at a very high speed even with low power. At higher power, there is a mechanical device called a wastegate that diverts exhaust gasses around the turbine fan to prevent overboosting the turbocharger. The other way to mitigate the depressurization is the closing the outflow valve.
Remember that the cabin is not a sealed balloon, but instead think about it like a cup of water with a hole in the bottom under a faucet. You can control the water level in the cup by either the amount of water pouring in from the faucet or by the amount of water than leaks out of the hole.
Losing pressure is indeed a problem and there are two sides to it. First thing is that the controller/valve is slow. That means if you reduce power, it probably would have to close the valve pretty quick because now most of the air has to be kept inside and excess air is getting low. Since it can't do that as you reduce power the cabin alt goes up at a relatively high rate for a short time. Maybe 2000ft/min for 5-10 seconds. The value depends on how fast you move the throttle. If it done very very slowly I guess you can get away with only 500ft/min.
If you are up, overspeed is a lesser issue, so I can use 22-24" MAP and have enough air. Down low I go for 20-22" MAP and everything is fine. All values are for a Continental engine (310P) and a descent rate of 1000fpm.
In the piper Cheyanne I've seen combustion heater burner tubes implode due to rapid Decents as all turbine powered aircraft do. The heater is part of the pressure vessel. Not sure if its pilot caused or something in the system that causes this. It is an expensive failure and i tell my turbine customers that rapid Decents are the culprit but i can't explain in further detail as how to avoid this other than don't do rapid Decent or the exact cause as it relates to the pressurization system.
excellent video... however, I started at 0:59 and I thought to myself "why would anyone want to fill the aircraft cabin with the exhaust gas from the engine???" (it only looked that way) :)
You never realize how much goes into a plane until you watch stuff like this
third reason and for me the most important is that you're faster since your true airspeed increases with altitude.
The reality of it is that on piston engines the 100LL fuel constantly plays havoc with its carbon build up sticking bleed valves and causing stuck turbos. Very high maintenance system, constantly cleaning out all that garbage.
I haven't flown for almost 10 years now
My last flights were between Manchester and Paris. On the outbound flight we were on a jet plane and when we got to full altitude, I felt really dizzy and had trouble keeping calm because of the dizziness. On the return leg we were on a turboprop plane and I felt ok.
Could this be anything to do with the fact that a turboprop flies at a lower altitude? Or would it make no difference if you were flying at 15.000 or 30,000 feet regarding the pressure inside the plane?
I'd really like to be able to fly again, but I am scared after feeling like this
Sporty's really pimping McDonald's now?
I didn't even notice that until I watched it again. Seems a little sketchy to me. I sure hope Sporty's isn't going to make a habit of this.
Where?
@@samborlon2:51. Above the pilot’s head.
I’m loving it.
@@johnopalko5223oh no! Not a sticker!!!
Start complaining when it's mid video ad breaks
Are Fighter Plane cab8ns pressurized?
Is that Mcdonald's placard tied to the plane's Airworthiness?
Hua.. didnt know Piston engine planes were capable of having pressure systems, but using the turbo for it makes sense.
There aren't many, and I think the only one in production at the moment is the Piper M350. The only other I know for sure of is the Cessna 210 Centurion, but those were discontinued in the 80s.
About the oxygen concentration ? How does keep it regular in the cabin ??
When it is pressurized, the air molecules (20% Oxygen) about the same as about 7k-8k elevation which people can breathe when inside the cabin.
The ratio of oxygen to other gasses in the air (mostly nitrogen) does not change with altitude. The only thing that changes is the pressure, which is what’s needed to push that oxygen across the tissue in your lungs.
McAirDrop?
What is this PSI you talk about? Why not use Bar?
You’ll be blown away: we also use feet, inches, and Fahrenheit!
@@sportyspilotshop 🤣
Aircraft don't use PSI, they use bar or hectopascals.
Not for cabin pressure 🤦🏻♂️
You can literally see on the instruments that it does..
If it’s a Boeing then there won’t be a door for the air to hiss out of 😂
In simplest terms pressurized aircraft are maintained at 1 atmosphere which is what we live and breathe in.
That’s not correct. One atmosphere would be sea level pressure on a standard day, expressed as 14.7 psi or 29.92 inches of mercury or 10.13 hectopascals. If you watched the video, it is explained that for almost all aircraft, maintaining one atmosphere would result in a pressure differential that would exceed the structural limitations of the cabin. This is why the resultant cabin altitude is much higher that sea level pressure.
@@As_A________Commenter hmm but the outside pressure only gets lower than 1 atmosphere as airplane climbs up and when it lands its exactly one atmosphere on the outer walls, so structural limits are not exceeded by external pressure if the airplane walls are designed to sustain that from inside.
@@BHARGAV_GAJJAR I think you need to replay the video buddy
If you care about weight, just take an oxygen bottle with you.
McDonalds? Really? Haha
What?
@@samborlonthere is a McDonalds plaque inside the plane on the upper control panel
At 7 seconds
Sorry, I can’t work with ancient feet and pounds.
Why do certain Americans pronounce it turban? It's not a religous headress.... are pine trees also pronounced "pins"
Why do Americans always say “turban” like the things Sikhs wear
A country with bad education. They mispronounce many words including the letter Z.
Hahaha 🤣😅🤣