What´s a RAT? RAM AIR TURBINE! Explained by "CAPTAIN" Joe
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- Опубліковано 22 бер 2017
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Dear friends and followers, welcome back to my channel.
Today´s topic is another very important one. What is the ram air turbine, or better known as the RAT.
We´ll be looking at some basic system knowledge on the Airbus Hydraulics (the green, blue and yellow system) and then dive straight in to an ELEC EMER CONFIG.
You´ll see how the ram air turbine is deployed and I´ll go into more detail about the ram air turbine duties. We´ll use a AC BUS 1&2 FAULT as a primary example and how the RAT produces electricity. And the second scenario will be a DUAL ENGINE FAILURE, and how the RAT provides electrical power plus hydraulic power to be able to control the aircraft in such an emergency event.
This is a basic explanation of the Airbus A320 Ram Air Turbine. Future videos where we´ll look at the hydraulic system in more detail are in the making.
Thanks for watching, see you latest next thursday, all the best your "Captain" Joe
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Thanks to Lars Hentschel providing me with the thumbnail picture, make sure to check out his pictures on www.airliners.net
Special thanks to HamburgVideosHD for providing me with this very rare footage of an A321 landing with the RAT deployed! Check out his channel for more great videos!
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Copyright @flywithcaptainjoe - Наука та технологія
I was at Brooklands museum where a restored Concorde is on display with the RAT extended. When the tour guide asked if anyone knew what it was for, a little girl said that it was an outboard motor so if they had to ditch the aircraft in water, they could get to shore. Just a funny story I thought I'd share.
Let's try that in the Hudson.
That's not bad at all!
May be we shall have something like that in the future, who knows
Krisztian Kormos great idea she could be an aerospace engineer
james ndung'u Then we'd need flying boats again
The rat is a small animal inside the belly of the aircraft and incase of double engine failure it will start running inside its hamster wheel and turn the engines with the hamster wheel so that the aircraft has engine power to land safely
The Truth Is Out There actually thats kinda what happens only the rat is just wind turning the cage that generates electric power : ) same principle!
And China Airlines use little children for that, right?
*starts to band him* well i guess the secret is out
The Truth Is Out There Great explanation , thank you!
and it is china eastern airline......
I Love That He Is Always Smileing :) It Makes Me Smile
Stay positive!
It helps that he’s got a very handsome smile too!
Not negative
Not Corona positive 🙄😅
@@flywithcaptainjoe When MH370 was gliding to the surface of the ocean with the captain controlling it in the cockpit, & only RAT power available (but batteries too), at which point (e.g. 10,000ft) would he have tried to set the wings' flight surfaces (via the centre electrical system) to slow the plane as best he could for the ditching? Would the available flight surfaces take longer to set, due to being on the secondary power grid? I think he was aware of the slowness of the secondary power grid as he would have simmed it, so he was prepared for the delay to set those surfaces. What do you think? Thanks in advance. Mickey 👍
3:47 "RATMAN ON".
Is it a superhero?
LOL
Da da da da da da da da da da da da da da da da -- RAT MAN!
It is in Italy. Very funny comics.
@@netsky3 il uomo topo
@@kingghidorah8106 yes, kinda of :D
Thank you! Yes, the famous Gimli Glider was the case when the RAT helped to remain control over the plane.
Correct, as mentioned in the official incidents at the end of the video!
winni223 i loved that one....how the pilot landed that ...omg
I have a question for you captain, do pilots listen to music while cruising?
Fast_Wifi yes, usually they prefer Psarantonis
was that the side slip landing?
"A RAT is one of the things you rarely see on an air plane." I would hope so
I do to
Like a hail mary.
this "rat" system was a key component of the safe emergency landing from FL360 (36,000ft) after a fuel miscalculation on an air canada flight. resulting in both engines flaming out with literally only minutes of alert warnings from the fuel pump pressure indicators. (from warning to engine flame out). The boeing aircraft landed safely but the nose gear didn't lock correctly and collapsed but the plane came to a safe halt at gimli airfield in the USA.
this aircraft was nicknamed the "GIMLI GLIDER" and flew many more years of service after undergoing small repairs :)
Gimli glider story :-P
oseo943
And Gimli is in Canada
Gimli Glider is one of my favorite story in terms of aviation accidents
@@hannahapor4856 Same!! (TACA110 is another one of my favourites; check it out if you're not familiar with it! Mayday episode 'Nowhere to Land'.)
Thomas yeah Canada was switching from Gallons to Kilograms and they asked for the amount of fuel in gallons and ground gave them that amount in kilograms.
Love your videos Captian Joe. I love knowing what's going on in the planes I fly in.
Bb vpv vv00ü00ü000üüği bbbbv0
One of the most notable use of the RAM is the gimli glider. remember that one that ran out of fuel due to a misconversion between imperial and metric? Yes, that one. No fuel, no engines, no APU, no control.
The same with the Azores glider.
That's the most primitive mistake you can make: "Oops! We ran out of fuel!"
thephantom1492 yea. Basically crap has really hit the fan when you need to use it hehe
thephantom1492 hahahaaha😂😂😂
True, I´ve mentioned it in the official incidents at the end of the video!
Hey Jo, in the movie "Sully" sully turned on the APU. The movie didn't show the RAT.!
Seen that too!
Shame!
I was looking for this coment.
true
Probably the RAT would would have been destroyed on impact on water...hence the APU
brilliant video. Just want to say that your spoken English is marvellous. And possibly better than some of our own native speakers.
If I'm not mistaken, learning English is a requirement for being a commercial pilot. Someone correct me if I'm wrong.
I don't think it is a requirement for Airchina pilots, since some don't even know the difference between MikeAlpha and November
Sir Adil-a-lot hahahahaahaha
Some of the vowels indicate he learned from a regional British speaker. Or possibly second-hand from same. The way he clips some of his words is very British English.
Thank you very much, means a lot to me :)
" The RAT was found in
the extended position when the airplane was recovered from the water. Both RAT blades were
present, and no major deformation of the blades was observed. " From the official report of the NTSB about the Hudson river landing
Dominique Touel really I found the rat making a nest in my boat.
But why didn't they use the APU?
@ They used the APU, and they didn't deploy RAT, it was deployed automatically, before Apu kicked in
True, and only because the plane deployed it automatically. They determined it's not necessary cuz they had APU started
I thought it was to slice the birds up.
That's actually what it's for, but due to people getting butt hurt, they tell you that it's some lame generator.
I guess that's the "fresh" poultry they sell in business class.
+PASSwordUSERname Lmao. That's really funny
PASSwordUSERname lol
dingle you ever see a seagull at 12,000 ft?
Nice video again Joe! Great to see your channel doing so well!
Thank you very much :) Greetings Joe
@@flywithcaptainjoe b
Thanks Captain for educating us on the RAT. Properly explained. Love your videos, both learning and fun at the same time.
wow your channel grew so fast. i was with you ever since 20k
My dad, 1Lt David B Waldrop III, had to eject from an F-105 (over Friendly territory) during the Vietnam War because of an engine turbine failure. The RAT deployed and gave him electrical and hydraulics after he shut down the engine. This gave him enough time to calmly and carefully prepare for the ejection and steer his plane into a safe trajectory for it to crash and maximize his chances for a safe ejection.
Wow
Here after PIA crash. RIP.
They spotted RAT was active on the doomed flight.
Another great example of how a Rat worked very well is the Air Canada Gimli Glider case.
Such an amazing feat of landing from those pilots.
I assume jet fuel is used to power the APU, so the Gimli Glider wasn't able to use the APU. They had to use the RAT to have any power at all.
Thanks for the video Captain. The Gimli Glider incident involving Air Canada Flight 143, and later made into a movie "Falling From the Sky Flight 174", where RAT was deployed and one of the main reasons the plane could be landed without any power from the engines and hydraulics.
God only knows why I am watching this video at 2 am.
2 PM here. Hello person on the other side of the planet. How are you?
You live in India, not by name, by a short logic I deduced...
Are you from California? Or maybe Vancouver Canada?
I give you my coordinate: 23 pm
Nidhin Varkey Varghese 1:18 am here 😊
Hi Joe, thank you so much for making these highly informational but still very understandable videos for all the aviation enthusiasts out there, such as me. My biggest career dream is to one day become an airline pilot and your videos are motivating me every day. My question is, what is the most common malfunction on an aiplane and what's the standard operational procedure during the event? I wish you all the best and keep up the good work!
Gotta say, never had much interest in airplanes but after watching a few videos from you ive grown intrested. Its really cool how these huge metal vehicles operate and how all the backup system work. nice to see so good explanations and i feel a lot more safer now when flying (i felt safe, but safer now). You've got my sub!
That's such a clever device.
It's so reassuring leaning about all of these ingenius redundencies. They help to counteract the too-many episodes of 'Seconds from Disaster' I've been looking at.
another amazing video Joe, keep up the good job!
i agree!!
Thank you very much :)
Nice thing to háve on a plane! Makes me feel a whole lot safer.
I know, but the idea of a dead stick landing, withOUT a RAT....now thát is scary.
im glad you speek slow and clear its good to understand for me :) thank you
The ease at which you explain & teach Aircraft systems & control is just breathtaking! I have learnt a lot of about Aircraft just from your videos!! Amazing!!
2:48 wtf
Hi Captain Joe,
erst einmal ein großes Dankeschön für deine Videos, welche du, trotz deines durchaus stressigen Berufes, hochlädst. Nun eine kurze Frage:
Kannst du ein Video über die genauen Unterschiede der Geschwindigkeiten (IAS, TAS, GS, Mach) machen, denn ich verstehe diese noch nicht genau.
Vielen Dank und mach weiter so!! :)
IAS: Angezeigte Fluggeschwindigkeit relativ zur umgebenden Luftmasse. Wird auch Unkorrigierte Eigenschgeschwindigkeit genannt. Wird direkt vom Staurohr gemessen= fehlerhafte messungen. Bei Airlinern wird dies allerdings korrigiert. Hier spricht man von CAS dann. Trotzdem wird es auch als IAS benannt, also bei Airlinern IAS=CAS.Unterhalb von FL270 ist IAS von Bedeutung. IAS= Die ''wichtigeste'' Geschwindigkeit, da die angezeigte Geschwindigkeit IAS über den Staudruck
gemessen wird. Der Staudruck ist ein Mass für den Auftrieb. Somit ist auch
die IAS ein Mass für den Auftrieb.
TAS: True Air Speed. Die ''echte'' Geschwindigkeit bezüglich der umgebenden Luft. Bedeutet hier wird alles berechnet. Wind, Windrichtung etc.
GS: Ground Speed. Geschwindigkeit bezüglich der Erdoberfläche
Mach: Alles über FL270 ist Mach ''wichtig''. Geschwindigkeit bezüglich der Schallgeschwindigkeit. Mach 1 ist Schallgeschwindigkeit. Passagier Flugzeuge fliegen bis zu 0,92 Mach (nur die großen 747-400etc.)
Danke! Die Themen werden auf jeden Fall in Zukunft geklärt! Grüsse joe
Hi Captain Joe! Just to let you know that your videos are getting better and better every upload. Can't wait for next videos. Keep it up ;)
Great video! Gives a small but interesting insight into how much engineering goes into modern passenger planes. There's so much the designers have to think about.
Yo dawg, he heard you like redundancy, so we gave redundancy to your redundancy so you can be redundant while being redundant.
As far as I’m concerned, that’s redundant. Don’t you think?
Please explain the WiFi on airplanes
Most in-flight broadband systems utilize 'proximity linking' to connect to cellphone towers while over areas where cellular signals are available. For areas where no broadband cellular exists, Ku band satellite communications is used to interconnect. I believe they use a technique referred to (in engineering slang terminology as "spot beam projection mapping/tracking", which anticipates the route of flight, and maintains communication with one of three satellites triangulating the signal.
The WIFI system used on commercial aircraft does not, in any way (with the exception of the 400~ power system) interconnect with anything else on the aircraft, to protect from hacking, or a cascade interruption which could affect any of the aircraft's systems.
They can also connect to satelites, an example of this is inmarsat. Not sure entirely but I know inmarsat can provide wifi through satelites
what aspect of wifi on planes?
He did a video on that. It’s here somewhere
Wifi costs money, all you need to know bud
A wealth of knowledge, thanks Capt. Joe! Have a good weekend!
You explain complex systems in such an easy-to-understand way!
In June I fly with Airberlin to Rhodos, maybe you are the Pilot ^^
Lennart hi, don't forget to visit Marmaris with www.yesilmarmaris.com fast catamaran's.. the are great)))
Sorry about this buddy but in sully captain Sullenberger started up the APU
Donavan Emanuel They used both.
Donavan Emanuel by the time the APU started the RAT was already out,it takes about 1minute to start the APU.
Your English is so well spoken and you're my primary source for learning about aviation. Thank you!!
This is awesome. Your channel has taught me so much. I take allot of flights and it's cool knowing how all the stuff works. Thanks
Can you tell me the idea/concept of pulling the stick back on a stall instead of pushing it forward like the rest of aircrafts?
If you enter alternative mode which shows on the ECAM you still have to push it forward as the plane can't recover by itself(That air france flight failed to acknowledge). You have stick pusher, right?
Seems better to have a push down moment incase of stall in all modes/scenarios.
RAT has to have a max speed right? 140kt for low speed. But does it come out at 0.76M automatically?
Wont it create enormous parasite/profile drag and the blades tip will over speed and stall, maybe even disembark.
Last question, you may not know this exactly but does the RAT create a yaw moment of the aircraft? If it does, are you restricted in crosswind?
Sorry for so many questions but the ATPL books don't explain that much about airbus or RAT.
Keep up the high quality videos captain! :)
Did you see how small the turbine was? I doubt it's able to cause any noticeable torque or drag. The landing gears are larger, and they're meant to be used all the time.
P.S. Someone please correct me if I am speaking nonsense.
Arcadiez I only know what I saw: the blade angle is adjustable, that will prevent overspeeding. But I wonder if you meant the moment it is opening? And the effect on yaw or gliding should be negligible, as there is no significant surface area compared to the size of the plane.
The *only* reason to pull back when stalling is if you are so close to the ground you'll, never regain control. In that case it's better to belly flop rather than nose dive.
Rathtrainer VLE for A320 is 280kt EAS or 0.67M so why not a RAT max speed? He stated that the RAT comes out automatically, but that seems irrational incase it has a max speed restriction, even at higher speed the blades will not be able to spin due to too high tip speed and high dynamic pressure.
Any type of drag at one site compared to other will create a disposable of forces. I'm not focusing on so much on the asymmetric blade effect but more on the fact that you have an object that will create parasite drag, especially as the parasite drag increases with speed.
The question is, is it noticeable. I know the rudder is extremely strong and the CFM 56 engined are strong but still.
Got a A320 TR or any aerodynamic engineering/physics degree? :)
Firecul42 But on airbus you pull back in all cases except when you're in alternative mode.
But in every other aircraft, small or big you pitch down to reduce the AOA. Every pilot get taught this, but then get taught to pull back on their airbus TR.. I get your point. But if you're stalled then you only option is to push forward to try to regain control even when you're close to ground otherwise you may fall like a stone especially with swept back wings(Tip stall).
I recon "PROPELLER ON A JET?" would be a more eye catching title lol.
but more clickbaity matey, which is lame, see?
Hey it works though.
And surely that title would start a "battle" in the comments.... we really don`t need that here.
but RATs are also on some turbo propeller aircraft.
BitRain he dont need the ad money tho
I love watching this video again and again. Great engineering explained.
Nothing better than one of your videos to brighten up my day!
Clear and competent as always, great job Joe :)
p.s. are you uploading an outtake video anytime soon? we'd love that!
Have you the FSLabs A32X ?
do you like the 787 or the A350XWB
Peter Hunt s A350
787
Peter Hunt A350
cool
both are carbon fiber materials do it all comes down to comfort and inside
Great complete explanation :)
Thanks a lot !
Never to late to learn something new even if ill never need it.!! Well explained
Please. I would like to have Japanese subtitles by all means ...
Are u asking for a friend? Because your english is dope
why aren't there multiple RAT's to get more power
Because it's only for emergency and in this case one rat is enough to power the essential systems.
A bigger RAT ore multiple RAT's would cause more drag and the plane slows down faster.
Yeah, but another RAT could power the coffee maker.
Cap.Like your vids!They re so clear and one undestands em with just your explanation and additional help visual resourced.Rudy from Costa Rica
I'm surprised you didn't mention the Gimli Glider incident in Canada. They ran out of fuel halfway through the flight (error in pounds vs kilograms when refueling plus failure of fuel guage) that resulted in the loss of both engines, plus no fuel for the APU, so total loss of electrical power. All they had was the RAT, but they managed to glide it down, land without a nose gear (gravity drop failed to lock), and no major injuries.
The Miracle on the Hudson flight at least still had the APU, but much less time to react to the situation.
Why not add a second RAT on the opposite side?
Perhaps that space is already used by a different emergency/back-up system.
Perhaps the PTU.
By the way at 1:48, you said minimum instead of maximum in case anyone was confused
I'm not a 100% sure but I believe he is correct saying 20min minimum. It would make sense that the batteries are certified for a minimum amount of time and not a maximum. If it is maximum it could also mean they are depleted even after 1min.
That's correct - the batteries are required to provide power for a *minimum* of 20 minutes. They may provide power for longer but, if they are working properly, they shouldn't run out in less than 20 minutes.
So, basically, you know you have 20 minutes of battery power. After that, you're running on promises if you can't start the APU or deploy the RAT.
whats wrong with minimum? I think he was right. Hell, he even typed it onto the screen!
I stand corrected
I interpretated it the same as AyyLenny did. Maybe Captain Joe should have explained a bit more in detail in the video why it's a minimum instead of a maximum. The system has to ensure that it can provide a Minimum of 20 minutes which results for the user/pilot in a Maximum of 20 minutes reliability.
Thank you for your fluent way of explaining!
😍
Another fantastic video with a great description.
RATM = Rage Against The Machine
That was not an A320 that you showed first. It was an A321. :-)
But the A321 is still a member of the A320 family.
PRG Aviation correct, but he explicitly mentioned the Airbus A320 and not the A320 family.
but whatever, dont be so picky, its not too important for the topic of the video.
You just wanted to show off your knowledge, I know, its ok.
U cant even tell the difference.It is a A320
not the matter of confict...haha
I literally understand everything!!!
Thank you
Thank you for supplying the information about R,A,T, very good narration of explaining how the emergency power works
I just love the way you explain
Thank you Joe👍👍👍 Recently discovered your channel and enjoyed your videos ever since. Almost better than flight school😅 Keep up the great work 👏 Best regards from Germany 🇩🇪
I really enjoyed this episode about RAT and you explained it very well!!! I'm not a pilot and I understood all of what you were saying!!! Thank you Captain Joe!!!
I love these videos - I will be a qualified pilot just from sitting at my computer desk soon! Hope to meet you one day in Berlin Joe! if I DO see you, I hope you don't mind if I ask for a photo with you! Cheers!
Hello Dear Joe, thank you very much for always sharing your knowledge with all of us. I really enjoy each and every one of your videos!
4:23 Something really important about the Hudson crash was that the Captain turned on the APU quickly after the birds hit. While this wasn't listed in any procedure, it was somewhat fundamental to the flight safety. The RAT did deploy momentarily but at such slow speeds for ditching the electrical power may have been limited and the flaps would not have been able to quickly extend; the cabin lighting would also have remained off and some of the cockpit displayed would have been off. Turning on the APU allowed more reliable control over the aircraft *and* most importantly it meant that the aircraft was no longer in alternate law (which it entered once the RAT was deployed); while largely inconclusive in the investigation it was noted that the airspeed of the aircraft was at about the top of VLS (approaching stall speed) and if the Captain had not activated the APU there would have been no stall or VAlphaProt protections whatsoever. It turned out that in the flare for ditching the Captain expected the aircraft to pitch up more to reduce the vertical speed but the aircraft was in normal law thanks to the APU and in VAlphaProt so it refused to pitch up any higher lest it stall; if the aircraft was in alternate law and if it had stalled the vertical speed would likely have been much higher in the ditch and possible less safe.
thanks,Joe for introducing us to the nitty gritty of airplane instrumentation.enjoyed the vdo.
Dear captain Joe
Thank you for your amazing videos, it's Always à big pleasure to see them. thank you so much
Great video! It helps me a lot understanding :)
Great video.
Captain Joe. Keep posting more videos like this one.
these are wonderful, interesting informative videos, made by a really lovely man any parent would be proud of.
Loved it! Great explanation :)
How interesting, you explained it perfectly!
First video from from Joe where I didn't learn anything new because I already knew about this lol but it is still better when Joe explains it.
Very cool. The windmill was deployed on Transat flight 236 into the Azores, saving the lives of all aboard.
Great explanation with imagery. Thanks!
I love your channel! So informative!
Wow thanks to your videos I actually understood this video quite clearly!
I love your videos, though I'm a Computer Science student but these videos are truly Fascinating. I'm amazed by your knowledge and Thanks for sharing it with us.
Nice info Joe. Thank you for the video. Can you do a video on workings around the radio?
My technically knowledge is perfect now in airoplane. This is making me very easy to understand and makes me learn more and more.
Many thanks Caption Joe.
Great video as always. Would love to know how pilots steer and control the plane on the ground. When taxiing and especially how they align the plane and keep it straight as it accelerates down the runway for takeoff. Thanks!
Love the voice over at "Blue Hydraulic System" at 2:47
Could you cover in one of your videos why landing gears are tilted in different directions, and why others with double bogies are straight? So why is the 777 and A330 main gear bogies are tilted more towards the back and why the 767 is more forward? Thanks Captain Joe!
Another great video! Thanks!
Fantastic video. I've wanted to know about the RAT for a while.
Thanks for the information 👍
RAT MAN ON just sounds awesome :D I wonder what could be the "worst" short description for a function in a jet plane ;)
Structural Integrity Loss maybe?
Always great explanations thanks much captain
Great video and explanation Cap.
Very good video! Keep up The good work!
I always watch your channel when I don't understand the plane's part. #KeepItUp! #Thanks!
Very nicely explained Joe!
Excellent video Captain Joe!!
Thank you Capt Joe, I did see one aircraft landing at LAX with the RAT deployed.
This is one of your best videos IMHO!
Actually I alloted in brake shop so lack of line maintenance knowledge. Your all videos helped me lot for my Interview.
Meet you soon on Field Captain
Brilliant stuff as ever Joe!!
I never seen that on a plane thank you buddy for making this video!!
I didn't know about this backup system. Nice video.
Can't wait to tell people there's a rat on the plane! Really enjoy your videos. Keep them coming.