Ep. 60: Inner Workings of an Attitude Indicator | Gyroscope
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- Опубліковано 26 лис 2017
- A view at the inner workings of a artificial horizon, or attitude indicator for a GA airplane. See how the suction powered vacuum instrument runs and spins the gyro to indicate your attitude in relation to the horizon!
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-Jon
The engineers that came up with these analog instruments were geniuses...
Yea I wanna make a mini one that fit your palm.It will be powered by weight rather than by gyro.
I was thinking the same thing. I think people were much smarter back then.
@@BrettMcNary If things go right,I'll have an old attitude indicator at some point in my life.
@@Nexalian_Gamer funny you should say that. My 182 is getting new G5's in it as we speak, and both are coming out of mine too along with the vac system. Know of any cool things to do with the old AI? ;)
@@BrettMcNary You could make a steam turbine out of the vanes and connect the axle to a generator.
What you referred to as limiters are pendulous vanes. Extremely important components to the instruments operation.
John you're doing something great here. There's no shortage of online ground school programs however you're teaching very useful and practical things which others don't go into.
That looks like a pretty complicated device. I just use my girlfriend. She changes her attitude pretty quickly.
😂😂😂😂😂
As a design engineer, a mechanic and a nearly 50 year pilot, I have never taken one apart, so pretty cool to see inside AH. Thank you.
How's your thumb doing 4 years later?
The “limiters” are actually called “pendulous vanes”, and are a critical mechanism to correct the gyro for precession.
Excellent! Honestly one of the only videos on the Gyro, and Attitude Indicator that just works ... Thumps up, very well done! :)
Thanks for another great video. I find it extremely helpful to know how things work, especially when dealing with malfunctions.
ive been reading theory book s about this but NOW i actually understand the working of gyroscopic instruments. thank you for an excellent explanation
Awesome Video! Loved seeing an in depth look at the inner casing of the instruments we always read about. Thanks.
thx for making such a great and complete introduction of how those system work inside and outside.
Thank you! Extremely helpful for a PPL distant learning student!
Fantastic video! By far the best AH video I have seen so far
The airplane is an absolutely incredible invention. This went way over my head- but it's very interesting to say the least. Thanks for this information video my man.
*love seeing the inside, so much easier to understand then reading it in textbook! thanks Jason* :)
Fantastic video! Cool to see the internals of the attitude indicator as this one instead of seeing drawings. Nice presentation.
Excellent stripdown! One of my more nervous passengers noticed the AH wobbling as it was spinning up and thought it was defective, wanted to get out!
Great video mate. I am an ATPL Student but I had never seen an Attitude indicator from inside.
Like the video but something you didn't explain and I had to go find on a different video. Those slots on the bottom where the air exits are called pendulous vanes. They exist as a self correcting mechanism to make sure the device is pointing down with respect to gravity. If you had a perfect gyroscope and flew from the north pole to the equator then the gyroscope would be pointing backwards 90 degrees, this prevents that from happening.The way it works is that when the gyroscope is tilted those gates on the bottom are free to swing and will move out of the way for one of the holes allowing air to blow out of it and block flow leaving the other one (the holes are offset from the center, this is why one opens while the other hole closes when tilted). When the air leaves one of the holes but not the other on the opposite side it creates a torque on the gyro and kicks the gyro back up wright.
Calvino, you've answered perfectly a question I was about to ask here. I was curious to know how the AI would function if it was "spun up", or initialized on a slope that is not perpendicular to the ground. Many thanks.
I've literally been debating this with another pilot on UA-cam, If those pendulous vanes are there to correct the gyro as the plane flies over the curve over the earth, therefore proving gravity has no effect on the gyro's orientation (since the gyro needs the vanes), then since my phone does not have pendulous vanes, the gyro in my phone should be way off when i fly to another country, but its not. Please could you answer these questions?
Calvino c
Toiletduckie44 Pretty sure your phone does not have a Gyro.
@@toiletduckie44 Unless you're special, you probably have 3 single axis accelerometers on your phone. It is a relatively complicated algorithm, that I don't quite remember, to isolate gravity from other accelerations. A mechanical indicator, on the other hand, does not go through a computer before showing you your attitude. I believe the algorithm in your phone does a similar thing to the gyro and the pendulous vanes. I am curious though to know how well it works in turbulent conditions.
now i understood how it work... very simple... but people makes it complicated.. thanks capt. 🙏 🙏
Great video, well done.
Sir this video was so helpful to learn the artificial horizon in a much practical way, please keep making such video based on practical viewing of the concept which is damn important in aviation, start making all videos on basic concepts of aviation. Thanks a lot.
Ok, I have to say that was pretty cool. Thanks for these vids!
The best video i have ever found on youtube, EVER.
Thanks!
Great video! Keep them comin'!
very interesting, good job, will subscribe and look at more of your vids now
Interesting video.I enjoyed the disassembly of the ai, along with seeing how movement affects it.
This video is awesome! So useful!
Great pilots are always learning! Wing-rockin' demo.
very cool, thanks!
Great video and lots of useful info.
This leads me to another question. How does a attitude indicator of a glass cockpit work. I mean the inner workings of it.
Pretty cool man! You´re awesome
Woo, that is now an amazing tutorial. Thank you.
Super cool thank you for the great video!
Thanks for posting!
It's funny, I am less than a month away from taking my Instrument Check-ride, and here I am going back to aircraft systems 101. This was really helpful. Did you by chance break down how a gyroscope works in the heading indicator?
This answered all my questions.... Great vid!!
Awesome! Thank you!
Wow that was really cool. Never new how it worked.
Now we have accelerotemers and AHRS,, Thanks for sharing
Great explanation! The past few engine starts I’ve had, there’s been some erratic movement in my AI. Once I do my run up, it levels off fine and operates perfectly. Any idea what could cause this?
Thanks for putting this together. As well the altimeter vid.
No problem! Check out more on fly8ma.com/
such a simple yet elegant design. i'm a bit of a nerd when it comes to mechanical stuff
Watch the film Total Recall, the Arnie one. The drilling machine the baddie drives has a row of flight instruments. installed.
Nice video great explanation.
I have on my desk in front of me, an Electric Humohrey AH08-0105-20 artificial horizon. This runs of 28 volts and does not require a heavy vacuum engine driven pump or an old fashioned Venturi tube that does not provide source until you hit 75 kts.
That was great! Thanks.
Man amazing , thank you
Capt thanks a lot from the PAF hercs flt engrs
That was cool
Thanks
The 172 at the school that I attend has it INOP and this video is great. Now I want to take it out and fix it lol
AWESOME VID
Grate job man!!!
this is awesome. now i understand how that thing needs vacuum, i had no idea :D
Was interested in putting some avionics in a car for a cool effect, but wanted them to actually function. This was very easy to understand and fun to watch. I'm not even a pilot! LOL. Thanks.
Lol well I'm glad it still helped ya!
Beautiful video
Thank you
This is great. I'd love to see a similar video on a gyroscopic heading indicator, if you have a semi-scrap one lying around to demonstrate with :)
wow. so clever done.
Am I the only one who thinks you have a similar voice like prosecutor Juan Martinez ? Nice video by the way and nice explained
perfect video
10,000 - 18,000 rpm ! Thanks for the explanation.
Great video, thanks
great video sir!
I appreciate it! Feel free to share it around a bit!
Amazing. Thanks
Yo! Really fun and informative video! Sometimes the AI in the 172 i train in randomly shows a 10-20 degree bank. Is that due to precession, or more so a mechanical deficiency?
very good
Nice presentation
I guess I have to work on my attitude then. Fantastic video! Show us inside a g1000!
From time to time, we always have to make sure our attitude is in check.
Wonderful video!
THAAANKS!
I was doing steep turn exercises in an older 172p with my cfi a few years ago, and I remember the compass gyro would flip 180degrees as I did the turns. I’m trying to get and idea of how the gyro tumbles after it hits gimbal limits with good visuals, you actually demonstrated it pretty good.
The directional gyro is obviously set up a bit different than the attitude indicator and I know it requires 360degrees of rotation about the airplanes yaw axis to measure headings. But what caused it to flip during steep turns?
Awesome buddy
Top vídeo
Very good
Nice one
Has many very complex attitude indicators also from airbus and soviet crafts, but never had a pneumatic one. I thought it stopped producing at 50's
Impressive. Now can you also explain laser gyros used in big passenger Jets?
Did you install a glass cockpit or this a spare/defective part
Do you have information about the actual bearing used for the gyro? Does it use just regular steel ball bearing or something more fancy?
That thumbnail is all the evidence I need to know that this guy is no stranger to a spanner.
Is it possible to take a signals from it to microcontroller directly then give the microcontroller tasks to do or it is not accurate signals.
That intro, from Codyslab it love it.
Very helpful.
Glad it helps! Share us on Facebook and around the airport with your friends!
Thanks.
Pitot tube measures stagnation pressure by reducing fluid velocity to zero while pitot static tube measures total pressure and stagnation pressure in different different tubes and gives the difference between them as dynamic pressure so indirectly it is used to measure dynamic pressure.
woow...thanks a lot,,
What happens if your gyro scope instrument starts to tumble, do you return to level flight and it will correct itself? Thanks
Wondering about the type of gyro that they used in 1959 Vtail Bonaza flown by Roger Peterson out of Mason City the "Day the music died?". Do all these instruments indicate the same or are there differences which could mislead a pilot in banking right when in reality, the instrument is indicating bank left as the "wing" on the left appears below the artificial horizon?
It's so refreshing when one resource leaves you with a complete understanding of an instrument instead of reading multiple books or watching multiple videos. Thanks for the post Jon!
Sure thing!!! Glad it helps!!! Share the site with your friends....we try to make it as simple and concise as possible!
Anything about turning and acceleration errors?
Serious engineering
Is it for display only. Or it is efficient to take signal from it to computer
my dad and my teachers and my baseball coach all always said that i had a bad attitude, is this gizmo all i needed to get them to pipe the F down?
This video really clears every doubt that someone could have.
Thanks 🫡🫡🫡
This is such an archaic instrument. I am glad the new glass MFD is taking over the task and it is cheaper too.
Its also far more likely to give wrong readings prone to glitches and power outages
2Phast4Rocket MFD still require one of these as backup.
It's amazing how simplistic that instrument is. I can appreciate the engineering that went into that simple mechanical device. I'm guessing that they are currently using a microprocessor based system that incorporates a multi axis accelerometer to do the same job. I know nothing about flying. It just seems that an electronic version would be cheaper, easier to design and construct.
But more likely to give problems! This is independent of the electrical system as is the altimeter and the airspeed indicator. If the electrics go, you have them. If the suction goes, you have airspeed and the turn and bank indicator as well as the altimeter. If the pitot tube gets blocked and you lose the airspeed, then you still have the artificial horizon.
A lot of planes still use vacuum powered backup instruments even when the rest of the cockpit is glass. And I would argue an electronic instrument is far more difficult to design and construct. All the mechanical one needs is some lathe work.
@@stargazer7644 I know very little about avionics and all my opinions are based on contact with mid continental avionics. This is what I was told by them and it's also written on their website. Electric attitude indicators have fewer maintenance requirements and potential points of failure than vacuum systems.
Could you talk more about the pendulous vanes and the weights that are used to correct the gyro?
Also agreed
Appreciate the enthusiasm! I didn't think anyone else out there was quite as nerdy as me! Haha....the IFR course will cover instruments and instrument errors a bit more in depth. I'll be sure to include that in there!
Are you still working on the IFR course that includes the pendulous vanes ? These videos are so great ! Id love to watch that instrument video explanation
Am I correct in assuming if you put an aircraft into a bank and perfectly balance the turn with rudder in order to give the g force of the aircraft through the bottom of the aircraft, as if it was on the ground, the attitude indicator would return to a position showing level even if you are in a bank. Obviously you would need to be in a bank for a considerably long time. ?
@@mphmtb Thats exactly what would happen ua-cam.com/video/kTXTCqMHyhg/v-deo.html
Shows exactly that effect
Yeah some clever stuff
Many thanks
Of course!! Feel free to share it around!
How do gyroscopes self correct though? I would think that if a gyroscope stopped spinning in flight there would be no way to get it working again as it no longer knows what orientation is flat so it doesnt know what angle to start spinning at in order to hold that reference plane. Yet I've seen videos where Gyroscopes are turned off and turned out of allignment (as pitching and rolling an aircraft would) and then the gyro is started again and somehow it slowly (but succsessfuly) returns to level with the earth. How is this done?