When Does The Ram Air Turbine Deploy

[@linhdj3000]

As a pilot flying boeing 777 and 787, I have to admit, your video about this RAT is so easy to understand, many thanks and keep it up.

[@AircraftScience]

My pleasure!

[@zachansen8293]

what dopes the first part of your statement have to do with the second part? Also, how is that an "admission"? That makes no sense either.

[@CHOXON2CHOXOFF]

Though i know the info already but i watch your whole video just for amazing animations.. its as usual awesome. Wish our study material be like it.

[@AircraftScience]

Thanks for the support.

[@d.h1270]

This video left me speechless! Incredible! Only those who have thorough understanding of 777 can film such a video! Love it!

[@sarcasticstartrek7719]

Use an AI to generate the script and the audio, like the "creator" does, and you will no longer be speechless.

[@natanijelvasic]

This is the best aviation channel on youtube.

[@yyyyy354]

The amount of details are amazing

[@LucasBustamante1]

The RAT was deployed yesterday on A320 CC-BAZ travelling from Chile to Paraguay

[@andreizadasilvapereira5312]

In which condition?

[@LucasBustamante1]

@@andreizadasilvapereira5312 I don't know exactly, but I think it entered a storm with a lot of ice

[@desert_jin6281]

A RAT deployment is as exciting as it's terrifying. Good video, thanks !

[@sujithame]

Plse upload some more videos in 777 other systems also... you really doing awesome

[@brotherv1035]

Amazing movie. I watched 8 movies in one sitting ! Just one small thing: What the root reason of ELEC failure condition caused RAT deployment is both transfer buses lost power. 5 generators fail will cause both transfer buses lost power. If just one generator available, even one BUG is working, the RAT will not deploy, because the generator will supply power to both transfer buses. But even 5 generators are working, if electrical system shorted on wire, caused both transfer buses fail, the RAT will deployed with all engines available.

[@craigbrown5359]

Incredible engineering!!! Great video!

[@Nacho-x8l]

Please someone tell me im not the only one laughing at the RAT DEPLOYMENT 😂

[@husseinchedjou1397]

I feel like the narrator created the most perfect aircraft ever from ground to top... Just look at that redundancy..

[@IIGrayfoxII]

Remember learning about the RAT from the Gimli Glider

[@praveenshetty2066]

Good detailed information 👏👏😊

[@billtracy8774]

I question the case ALL 5 GENERATORS FAIL (APU+4 Engine generators). The APU is not normally able to prevent RAT deploy if it is OFF. If the 4 main engine generators fail or are turned off intentionally (MH370 possible case) APU will automatically come on, but it takes about 60-secs to fire up. Thus RAT could deploy if only the 4 engine generators fail. MH370 case (possible deliberate diversion) brings up a lot of complex questions of unorthodox ("intentional") failures.

[@colepeterson5392]

I love these videos!

[@miketaggart3803]

A question: the RAT deploys when all 5 gennys fail, all hydraulic pumps fail or there is loss of hydraulic PSI due to a leak. How will the RAT help hydraulic PSI if there is none to pump? Like when the DC10 in Iowa lost all its fluid due to an engine explosion, or the DC10 that lost its engine on take off from ohare??

[@justing42]

hydraulic fuses do that

[@andreizadasilvapereira5312]

The right hydraulic system also operates the brakes, and the center system operates the steering. (Not mentioned in this video)

[@justing42]

not both brake systems it doesn’t

[@kevinurregojaramillo6202]

How can i make this kind of animations ?

[@pgreenx]

Seems to me I’ll only be flying 777 going fwd

[@andreizadasilvapereira5312]

Wait a minute, in 3:40, while showing fuel exaustion, there is still some fuel left, why is that?

[@AircraftScience]

Unusable fuel.

[@strogggdf587]

Rat has been deployed with some incident aviation such as air transat 236 and air Canada 143.

[@ronparrish6666]

Just wondering i know how the RAT sorta works but could they also figure a way to get some electrical power from the spinning blades of the engine also even if they run out of fuel the blades would still windmill

[@IIGrayfoxII]

Engine fan blades do nothing but help suck air in to the compressor.

[@omarhossam.8162]

Wonderful❤

[@ivanbratanov8699]

The redundancy of MCAS was on midages level. I hope its better here…

[@tigerfan826]

I've got a question: If the RAT only powers the left elevator, wouldn't it create an uneven distribution of lift? If you're trying to save the aircraft in that situation, why not power both elevators?

[@justing42]

it powers the left HYDRAULIC system…not just left elevator

[@tigerfan826]

@ thank you

[@gjierodelapena1689]

I have another suggestion 😅 for a topic the vfsg of the GEnx 😅😂

[@andreizadasilvapereira5312]

Can we deploy the landing gear ONLY with the RAT, in either normal or alternate mode?

[@AircraftScience]

No, The RAT power can only operate the flight controls. When center hydraulic system power is unavailable, an alternate system is used for gear extension.

[@justing42]

it’s called GRAVITY

[@onthemoney8356]

Fascinating!

[@rainlamarte1630]

Can the landing gear deploy solely from the power provided by RAT and batteries?

[@AircraftScience]

The aircraft has an alternate gear extension system which uses battery power to unlock the landing gear. Once unlocked they free fall to the down position. RAT power is only used for the control surface operation.

[@rainlamarte1630]

@@AircraftScience Thanks!

[@muhammadabdullah03]

These systems have Electrical backups - Flaps/Slats - Landing Gear Alternate extension system

[@justing42]

@@muhammadabdullah03to unlock the gear…that’s it

[@karthikckrishna]

Fantastic

[@demal1010]

Can APU and the intake door it needs to open be used in flight?

[@AircraftScience]

Provided there is no failure, the APU is available in the air. It supplies electrical power at any altitude. Pneumatic power (bleed) is available up to an altitude of 22k feet.

[@billtracy8774]

APU takes about 60-secs to fire up, so it is not instantaneously available. There may also be certain operational constraints such as reasonable altitude for APU to start..

[@wardogies]

Sounds like air Canada flight 143

[@zulms7107]

💙

[@himmetramthakur6525]

Same vidio sand yu tub

[@VitalyTretyachenko]

You told to us 2 conditions when RAT commanded to deploy. But there is another situation to deploy it. Manual control from flight deck P5 control panel. PAT can be deployed automatically only when aircraft is in the air. But manual deployment available even on ground. If you want to tell us something, do it with full information, otherwise you have a risk to be dilettantes.

[@justing42]

take weight off wheels in the hangar and it will go

[@VitalyTretyachenko]

@@justing42 If you do so, you will activate HIDIM auto-extension logic. I mentioned for another method to deploy RAT- manual.

[@MunaShrestha-f3g]

Rat 🐭🐭🐁🐀🐀