According to the RAT wiki page, all other redundancies work because these things don't get deployed very often. Cool video, thanks to all who made it possible.
I imagine it must spin up pretty good of course depending on aircraft speed. Much faster than the Mazda RX7’s I used to work on. The rotary engine took 7K rpm no problem & I heard modified ones for racing hit over 20K.
What tells or stops the RAT in perfect alignment to egress and ingress the door opening? If is is not aligned correctly and attempts to ingress or egress it would damage the plane and the air foils on the RAT. So what stops it so it is perfectly vertical or aligned?
Stig I found it thanks, brilliantly explained 👌 I only mentioned it because I saw one deployed on a Qatar 787 flying yesterday at the Boeing factory in Everett, Big jet Tv
@@StigAviation with the RAT that is free electricity should it not be used all the time? Could you imagine if there was two, one at the back and one at the front and bigger as well, and how much power that would generate? Just an idea
I recall on of our 757 had its RAT auto deployed for some reason during a heavy rain while parked at an airport in Austria. Pilots couldn't explain to me what it was that caused it. Could it have been a short due to flooding?
In my ignorance I thought that the rat once deployed was returned to its well manually by a mechanic on the ground 😂 it seems at the end of your video that the rat is risen automatically
No. You are correct. It’s done manually. A mechanic has to stow it on the ground. It’s being raised up because someone on ground is pressing a switch for it to come up.
@@stenic2 it’s not that heavy but it is attached to an actuator and has retention springs. Hence why we bring it up using the aircrafts own hydraulic system.
Dude, I never knew that commercial aircraft had a propeller hidden onboard. As you said, its a failsafe if all electrical systems and hydro systems failed onboard, due to loss of power from the engines, as well as no power from the APU. But I have to believe that this single propeller, while small, might even add a tiny bit of thrust, to help keep the plane flying. So I finally have a question to ask of you, that you can answer in a future video. Please talk a little bit more about the RAT, is it actually capable of providing the aircraft a bit of thrust as a backup, or is it only for power generation for flight controls?
Everything about the rat is in this video, it does not produce any kind of thrust. All it does is provide minimal electrical power and minimal hydraulic power.
About 4.5 feet maybe 5. Haven’t measured it myself. But it’s about the size of a 10 year old child (sorry 😅 that’s the only analogy I can come up with)
Can I just say thank you for keeping us safe. I could watch you all day anything to do with jets mechanics etc im obsessed. I live across the road from Roll Royce in Derby uk and I see the massive engines being built everyday. Wonderful stuff 👏 fantastic content sir 👍👍👍
Nice
Thanks
According to the RAT wiki page, all other redundancies work because these things don't get deployed very often. Cool video, thanks to all who made it possible.
Thank you for watching, i appreciate you being here
@@StigAviationso you test them by feeding it with fluid.
Isnt is more logical to test it with a large fan in front to see if it actually works
@@Sadik15B it’s not about what is logical or not. We follow maintenance manual procedures. That’s how the manufacturer wants it done.
Great sir
👍
great video, making some of the rarest things on an airliner visible, thank you so much! Best video on RATs!!
Glad you enjoyed it!
I had never seen one of these before. Interesting.
There is a lot of fascinating systems like this on aircraft. Glad you enjoyed it
Just wondering was the 2 blade design to save space or was that the best design for efficienty
Both actually... your mind already understood that... well done
I imagine it must spin up pretty good of course depending on aircraft speed. Much faster than the Mazda RX7’s I used to work on. The rotary engine took 7K rpm no problem & I heard modified ones for racing hit over 20K.
Good point!
Great to see this kind of content. It’s not often we have such in-depth, up-close perspectives of the mx side of commercial aviation. Keep it coming!
Glad you enjoyed it!
Another great educational piece..thank you sir
Glad you enjoyed it
The other kind of rats you can find walking around the terminals at night at Orlando international airport squeak squeak 🐀
Don’t worry, we have those in LAX too 🤣
Very interesting video Stig, ive seen these but never really grasped how they work or when theyd be deployed. Thanks for explaining
My pleasure , just another insign to aircraft safety
Great info as always... well done !!!
Thank you. Glad you enjoyed it 👍
What tells or stops the RAT in perfect alignment to egress and ingress the door opening? If is is not aligned correctly and attempts to ingress or egress it would damage the plane and the air foils on the RAT. So what stops it so it is perfectly vertical or aligned?
It has an internal cam the will prevent it from going up if not put into alignment.
Stig I found it thanks, brilliantly explained 👌 I only mentioned it because I saw one deployed on a Qatar 787 flying yesterday at the Boeing factory in Everett, Big jet Tv
Time to time they deploy it to test it out in flight. That must have been what you saw.
@@StigAviation with the RAT that is free electricity should it not be used all the time? Could you imagine if there was two, one at the back and one at the front and bigger as well, and how much power that would generate? Just an idea
Could be something like that in the future
Hard to say which kind of rat is cuter
Why there is no RAT in B737??
@@mhdazlam7929 because the 737 is still a direct control aircraft, no fly by wire.
Nice one
Thank you!
What do you use for video editing
Simply phone.
I recall on of our 757 had its RAT auto deployed for some reason during a heavy rain while parked at an airport in Austria. Pilots couldn't explain to me what it was that caused it. Could it have been a short due to flooding?
Might have been or they might have inadvertently pressed the deployment switch.
In my ignorance I thought that the rat once deployed was returned to its well manually by a mechanic on the ground 😂 it seems at the end of your video that the rat is risen automatically
No. You are correct. It’s done manually. A mechanic has to stow it on the ground. It’s being raised up because someone on ground is pressing a switch for it to come up.
@@StigAviation I meant that I thought you had to push it by hand inside it's well 😉 but it must be too heavy to lift
@@stenic2 it’s not that heavy but it is attached to an actuator and has retention springs. Hence why we bring it up using the aircrafts own hydraulic system.
Dude, I never knew that commercial aircraft had a propeller hidden onboard. As you said, its a failsafe if all electrical systems and hydro systems failed onboard, due to loss of power from the engines, as well as no power from the APU. But I have to believe that this single propeller, while small, might even add a tiny bit of thrust, to help keep the plane flying. So I finally have a question to ask of you, that you can answer in a future video. Please talk a little bit more about the RAT, is it actually capable of providing the aircraft a bit of thrust as a backup, or is it only for power generation for flight controls?
Everything about the rat is in this video, it does not produce any kind of thrust. All it does is provide minimal electrical power and minimal hydraulic power.
No thrust Sir, if anything it’s extra drag. Buy yourself a kid’s pinwheel. Does it spin by itself?
I think theres only about handful incidents every decade where RAT needs to be deployed.
Yup. Very rarely it has been used. But it’s still there as a backup.
It saved the day a couple of cases where the jet had fuel starvation.
what are the dimensions of the space that holds the turbine while in stalled position?
About 4.5 feet maybe 5. Haven’t measured it myself. But it’s about the size of a 10 year old child (sorry 😅 that’s the only analogy I can come up with)
@@StigAviationI was on a flight to Israel that had kids aboard I wanted to shove in the RAT compartment. But I DID love flying on a 747!!!
Thank you stig !
My pleasure! 👍
Great video 👍👍👍💪💪💪
Glad you enjoyed it
Can I just say thank you for keeping us safe. I could watch you all day anything to do with jets mechanics etc im obsessed. I live across the road from Roll Royce in Derby uk and I see the massive engines being built everyday. Wonderful stuff 👏 fantastic content sir 👍👍👍
I appreciate that!