Startup of a Russian "type 458" gyro block of a MiG-21 fighter after almost 40years of storage

Ғылым және технология

The 'type 458' gyro block (In Russian: 458МКС-15-32) in combination with the AGD-1 1122A/B (In Russian: АГД-1) type attitude indicator/artificial horizon is a part of the inertial navigation system used in the Mikoyan-Gurevich MiG-21 supersonic jet fighter aircraft. The same gyro block is also used on a big variety of other Russian fighter jet or transport aircraft still flying today!
The shown gyro block was kept in storage for almost 40years after being rejected, this is the third startup after the storage. The cover is removed, so you can see the internals of the system during startup and very basic testing.
The current setup yet lacks the matching AGD-1 1122A/B type HSI instrument, which could show both pitch and roll, so instead the pitch indicator block (syncro resolver and AC servomotor with servo amp) of a AGB-3K type attitude indicator is wired up for operation.
Power requirement of the system is 27V DC and 3x36V 400Hz AC. Steady state total power consumption of the system is around 60W off the 27V bus.
The 27V DC supply is provided by an off the self industrial SMPS capable of 10Amp output, while the 3x36V 400Hz AC supply is generated with a solid state 3phase 400Hz sine-wave inverter running off the 27V supply housed in the black box.
Don't expect much, have zero experience in video making, so video quality is rather poor as usual 😀

Пікірлер: 1 500

  • @vladshmit
    @vladshmit2 жыл бұрын

    When I was a little kid, I had to spend the whole summer in our summer-house which was close to the military base. So these guys had abandoned fighter jets sitting on a field nearby. Unfortunately, my family couldn't afford a decent picture camera those days but I hold the memories in my head when I and dad were spending hours in that field moving jet controls, watching flaps moving, flipping switches, and even it was totally ok taking apart those jets ))) I can now recall, I was playing with the parts of the gyro in the video. I had many toys dismantled from an aircraft in my childhood. Thanks for posting that, it brings memories about those days and my dad.

  • @VengeanceRMP

    @VengeanceRMP

    2 жыл бұрын

    That’s wholesome as fuck. Thanks for sharing.

  • @patrickderp1044

    @patrickderp1044

    2 жыл бұрын

    the earth being flat is a thought i sometimes entertain, i dont know why there is all this fluster about it, these gyros dont operate on a globe sense but a plane sense

  • @DumbledoreMcCracken

    @DumbledoreMcCracken

    2 жыл бұрын

    @@patrickderp1044 pendulous vanes or mercury switches (in this case)

  • @isaacsrandomvideos667

    @isaacsrandomvideos667

    2 жыл бұрын

    Is it still there?

  • @vladshmit

    @vladshmit

    2 жыл бұрын

    @@isaacsrandomvideos667 No of cause, one day some guys showed up carrying giant gas-powered angle grinders, cut them all and sent them to scrap yard.

  • @hectormclean33
    @hectormclean332 жыл бұрын

    "Wow that jet engines loud!" "That's just the gyro."

  • @heateslier

    @heateslier

    2 жыл бұрын

    I thought, wow even the gyro of a jet sounds like a jet 😁

  • @millsyinnz

    @millsyinnz

    2 жыл бұрын

    @@heateslier for a moment, I thought the sounds were just dubbed in.

  • @monoblockadi9530

    @monoblockadi9530

    2 жыл бұрын

    that gyro powered the mig-21

  • @user-pq8fg8pq6q

    @user-pq8fg8pq6q

    2 жыл бұрын

    Our gyro*

  • @teknoman117

    @teknoman117

    2 жыл бұрын

    @@heateslier It's just the sound of things that spin fast.

  • @kimlanbu
    @kimlanbu2 жыл бұрын

    it is hard to find a military grade gyro, it is even harder to find datasheet of it. Really nice job.

  • @Alexey-1

    @Alexey-1

    2 жыл бұрын

    На Горбушке можно найти всё

  • @martintoth9337

    @martintoth9337

    2 жыл бұрын

    @@Alexey-1 where?

  • @MiraRK69

    @MiraRK69

    2 жыл бұрын

    @@martintoth9337 main Moscow's "after use" market. Some sort of local meme, that in Gorbushka you can find anything, even old nuclear reactor, or radioactive bear with balalaika.

  • @gotchaabeech

    @gotchaabeech

    2 жыл бұрын

    Lol

  • @gotchaabeech

    @gotchaabeech

    2 жыл бұрын

    Babushka

  • @quietjohn5523
    @quietjohn55233 ай бұрын

    I used to be a US Navy avionics technician and in-flight technician/radar operator on the E-2C Hawkeye in the 80s (last class of enlisted aircrew flight technicians for that aircraft btw). Back then we had two redundant inertial nav systems that had to spin up and cage before the aircraft moved. (this was all pre GPS) It took about 10 minutes. Then u punched in your current lat/lon and u were gtg. Both the front end instruments and back end weapons systems used those int nav inputs. The computer in that aircraft used a program on magnetic tape reels and had magnetic core memory! An 8k memory module was about the size of a large math or science text book. It was amazing how it all worked so well.

  • @preddy09
    @preddy092 жыл бұрын

    Amazing to think of how they did these back in the days of analogue/mechanical computers. Equally amazing, today a similar IMU unit with even more sensors and axes can fit on your thumb nail for a few bucks.

  • @graealex

    @graealex

    2 жыл бұрын

    Fighter jets typically don't use MEMS for their INS, so no.

  • @preddy09

    @preddy09

    2 жыл бұрын

    @@graealex True. In tactical applications and space craft mechanical gyros are used, my guess is in the event of a power failure and restart, the already spinning gyro would continue to hold orientation where a MEMS one would need to be recalibrated upon restart. That would be my guess. Still, majority of military use cases especially unmanned units and with better backup systems, the benefits significantly outweigh the cons.

  • @graealex

    @graealex

    2 жыл бұрын

    @@preddy09 Again, modern fighters also don't use mechanical gyros.

  • @Vid304You

    @Vid304You

    2 жыл бұрын

    @@graealex Well, will you tell us what they actually use?

  • @preddy09

    @preddy09

    2 жыл бұрын

    @@graealex First off, all gyros are mechanical as they rely on conservation of mechanical motion. Mems gyros have damping factor so large that that they oscillating actuator stops almost instantly. If not the older "spinning disc" type mechanical gyros, newer gyros use light interferometry based mechanism. Which again is just a bunch of spinning optics where changes will result in interference. So it comes down to noise and holding time. Mems have near zero holding time. I'm guessing both spinning disc and spinning laser/fiberoptic will spin down over minutes, and significantly lower electrical interference.

  • @philgower292
    @philgower2922 жыл бұрын

    I own and fly a Russian civilian trainer airplane, designed in the mid 1960s which contains the original hardware such as this. I should make a video/audio of the startup of the electronics/radial engine (pneumatic start) for anyone interested. Rotary inverters (28 volt DC powered) produce all the necessary 3 phase voltages to run the gyro and Remote compass and other instruments. It has a 3 kwatt DC generator (engine driven) and the voltage regulator for the battery is a carbon pile design. All very crude but when working - very reliable. Let me know if you want me to do this. Cheers, Phil

  • @barjan82

    @barjan82

    2 жыл бұрын

    Let me guess, you're talkign about a Yak-18? 🙂

  • @philgower292

    @philgower292

    2 жыл бұрын

    @@barjan82 A Yak 18T to be precise. Mine is one of the ones in the last production run built in 1993 at the Smolensk factory. It has all original instruments/power supplies apart from having installed Western type instruments such as an altimeter showing feet, transponder, VOR/DME and 2 Becker VHF radios.

  • @JJSideshowBob

    @JJSideshowBob

    2 жыл бұрын

    "When working, very reliable" - excellent :)

  • @SanjanaRanasingha

    @SanjanaRanasingha

    2 жыл бұрын

    Please do! We would love to see!

  • @crf80fdarkdays

    @crf80fdarkdays

    2 жыл бұрын

    @@philgower292 hell yeah dude please do show us a video of the old yak

  • @inlasttonowhere4459
    @inlasttonowhere44592 жыл бұрын

    This is a new lesson for me. As an engineer that's fascinating. I can't even imagine what the Millitary specs had to be for that beautiful machine.

  • @powerelectronics7544

    @powerelectronics7544

    2 жыл бұрын

    Note to self "there is zero Indication of Altitude/depth on the "Level indicator"-(don't know aerospace engineering) so i don't Know what the "module" is called, but that Gyroscope Looks really really fascinating Qeustion ? Are there Three Wheels Rotating on the Gyroscope Or Just Two?

  • @inlasttonowhere4459

    @inlasttonowhere4459

    2 жыл бұрын

    @@powerelectronics7544 I wouldn't know. My educated guess is that is it equipped with planetary gears. Am I close?

  • @VidarrKerr

    @VidarrKerr

    2 жыл бұрын

    And... That was a piece that was rejected!

  • @inlasttonowhere4459

    @inlasttonowhere4459

    2 жыл бұрын

    @@VidarrKerr 😆 like I said, guess. Must admit it's still cool.

  • @VidarrKerr

    @VidarrKerr

    2 жыл бұрын

    @@inlasttonowhere4459 For sure it is! It is beautiful.

  • @peanuts2105
    @peanuts21052 жыл бұрын

    Let's take a moment to appreciate the beautiful engineering and manufacturing of this gyroscope

  • @lucasrem1870

    @lucasrem1870

    2 жыл бұрын

    They did a crappy job, halleluiah! Army people! Not scientists!

  • @raloed.363
    @raloed.3632 жыл бұрын

    For such a simple mechanical device I never knew they could get so complex. That thing looked like it would open a portal to another dimension

  • @keaponlaffin6737

    @keaponlaffin6737

    2 жыл бұрын

    mass effect mass relay

  • @HANKTHEDANKEST
    @HANKTHEDANKEST2 жыл бұрын

    I love Soviet tech--it's either amazingly robust and overbuilt, or totally insane and shoddy, or BOTH! Either way, Soviet stuff is really really cool. What an incredible little machine, thanks for sharing it with us.

  • @MiGujack3

    @MiGujack3

    2 жыл бұрын

    I would describe soviet tech as extremely simple, perfectly designed for the task, making it extremely reliable. It doesn't stand out, because it's not over engineered to prove anything, remember the tanks in WW2.

  • @forwox

    @forwox

    2 жыл бұрын

    Military, yes. Civil, forget about it. Total junk. All the resources were prioritised to military tech.

  • @NeverDieKnight

    @NeverDieKnight

    2 жыл бұрын

    I agree.

  • @xerxis301

    @xerxis301

    2 жыл бұрын

    @@forwox I have to disagree. For example soviet cameras Zenit were quite nice. And there were other examples of civil goods that are not junk.

  • @vladimirnaydyonov

    @vladimirnaydyonov

    3 ай бұрын

    Don't you realize that all this is a copy of British, German and American technology?

  • @Kryptkeeper911
    @Kryptkeeper9112 жыл бұрын

    And to think everything that makes that incredible piece of technology was just random materials in the ground at one point and someone turned it into that

  • @maroman556

    @maroman556

    2 жыл бұрын

    Yes the result of building things that build things. The construction of this and a lot of things started a long time ago with unrelated items.

  • @johnnycash4034

    @johnnycash4034

    2 жыл бұрын

    This kind of thinking is what we need.

  • @RobertLBarnard

    @RobertLBarnard

    2 жыл бұрын

    @@johnnycash4034 Yes, today we are born on, but have the choice to stand, sit, or fall off of the shoulders of giants.

  • @erikwallebom

    @erikwallebom

    2 жыл бұрын

    Exactly. People living 5000 years ago could have built a microprocessor if they only knew how. Everything was already there except the knowledge.

  • @ryanchappell5598

    @ryanchappell5598

    2 жыл бұрын

    nope, and thinking like that is stupid

  • @landrum3893
    @landrum38932 жыл бұрын

    I used to work on A-6E Intruders that had IMUs like this. It was in a sealed gold box in the nose wheel well and was painted gold because, we were told, it was worth it's weight in actual gold. It weighed like 25kg and whined loudly like this gyro.

  • @sentinel1064

    @sentinel1064

    3 ай бұрын

    -aha, that's the "Russian gyro" concept was stolen from.

  • @lmeza1983
    @lmeza19832 жыл бұрын

    With that sound I think the gyroscope can fly on its own.

  • @saladinhamza2271

    @saladinhamza2271

    2 жыл бұрын

    😁

  • @lucasrem1870

    @lucasrem1870

    2 жыл бұрын

    old crap!

  • @draconas109

    @draconas109

    2 жыл бұрын

    @@lucasrem1870 "old crap" that still works after 40 years, these days you're lucky to get an iPhone to live over two years

  • @saladinhamza2271

    @saladinhamza2271

    2 жыл бұрын

    @@draconas109 right can't remember smartphone can live over 5 years

  • @NeverDieKnight

    @NeverDieKnight

    2 жыл бұрын

    @@draconas109 only a brain dead with a phone wouldn't notice how incredible this machine and technology is.

  • @TheHuesSciTech
    @TheHuesSciTech2 жыл бұрын

    I love how it has a little orange bubble/spirit level built in!

  • @qdaniele97

    @qdaniele97

    2 жыл бұрын

    So you can be sure it's level when you calibrate it.

  • @manishmandal-78

    @manishmandal-78

    2 жыл бұрын

    Thanks. I was wondering what that might be.

  • @starliner2498

    @starliner2498

    2 жыл бұрын

    @@qdaniele97 I belive it indicates side-slip while banking

  • @mulgerbill

    @mulgerbill

    2 жыл бұрын

    @@starliner2498 the equipment case won't be in the cockpit, just the gauge that's sitting on the PSU. That bubble is for the benefit of the techs during install and maintenance

  • @starliner2498

    @starliner2498

    2 жыл бұрын

    @@mulgerbill not convinced man, might be dual purpose but it's definitely used for side slip indication (there's a separate primary instrument nearby)

  • @iamthetinkerman
    @iamthetinkerman2 жыл бұрын

    Incredible to see this kind of technology, which was so advanced once upon a time

  • @luminousfractal420

    @luminousfractal420

    2 жыл бұрын

    wont be long at all until theyre saying that about silicone chips and the vast amounts of power they require :) all that excess heat and fans and craziness. photonic circuits is the new thing. youll be telling your grandkids about heatpipes and theyll be looking at you like your a caveman 😂

  • @conodigrom

    @conodigrom

    2 жыл бұрын

    Well, if don't configure a modern IMU properly and don't filter the output with the proper transforms...it's gonna be WAY worse than a mechanical gyro!

  • @lucasrem1870

    @lucasrem1870

    2 жыл бұрын

    @@luminousfractal420 emulate it you meant, or use Russian sofjet skills to build it!

  • @drawingboard82
    @drawingboard822 жыл бұрын

    I'm very impressed that you found out what all the wires are for! Well done

  • @lucasrem1870

    @lucasrem1870

    2 жыл бұрын

    You understand the basics, so you understand what it does! Why he needs it? mad!

  • @oldschool2546
    @oldschool25462 жыл бұрын

    Even though having been an electronic engineer for 25 years, I feel humble.

  • @carpediemarts705
    @carpediemarts7052 жыл бұрын

    My dad had some gyro from something ww2 that was air powered. Had a 3" brass wheel with little cups cut in the rim for air to blow it around. Everything required amazing workmanship before computers.

  • @drawingboard82

    @drawingboard82

    2 жыл бұрын

    If you check my latest video I get one of those working:-)

  • @yelectric1893

    @yelectric1893

    2 жыл бұрын

    Still does take workmanship in a way, but I know what you mean. Elegance. Cessnas still use something similar to this day though.

  • @sylviaelse5086

    @sylviaelse5086

    2 жыл бұрын

    Even now, in light aircraft some instruments are air powered, and others are electric, the idea being that a single failure won't disable all the instruments.

  • @yelectric1893

    @yelectric1893

    2 жыл бұрын

    @@sylviaelse5086 Ram air power is cool

  • @Matsci101

    @Matsci101

    2 жыл бұрын

    That was from a Torpedo.

  • @8180634
    @81806342 жыл бұрын

    The lack of drift has always amazed me for a mechanical gyro, a lot of thought and design went into that.

  • @lucasrem1870

    @lucasrem1870

    2 жыл бұрын

    Matt South You ever used it, emulated it? What part you can find, just fix a Gyro, good engendered? Who cares, army gear!

  • @haramaschabrasir8662
    @haramaschabrasir86622 жыл бұрын

    This video is absolute gold! Such details about old aircraft tech are incredibly rare to find

  • @shergillfamily7983
    @shergillfamily79832 жыл бұрын

    Thank you for sharing. That was so cool 😎. It’s amazing to see older technology still capable of today’s time and also seeing how far along we have came. We have learned a lot from our older engineers, scientist, machinist and been trying to improve. 🤙🏼

  • @klaasj7808

    @klaasj7808

    4 ай бұрын

    alot of old technology is still being used and it is sad that current generation that everything from the past is obsolete. well i can tell you as man kind we went downhill instead of upwards, im sure.

  • @owenkegg5608
    @owenkegg56082 жыл бұрын

    I love stuff like this, part of the reason things like the Saturn V or the SR-71 are so special is because the control electronics are electromechanical. Don't get me wrong, I love being able to buy an IMU, stick it on a breadboard or perfboard and it just works but there's nothing to it. I really wish there was still a place for electromechanical stuff like this today, because I enjoy the mechatronics much more than just electronics but it's sadly obsolete AFAIK. It's funny though, tons of US military tech, especially missiles and planes, is from 50-60 years ago and still uses electromechanical tidbits, even if upgraded ones. I also love how this sort of thing is the thing you can actually repair, not just desolder and replace.

  • @js-wy8fg

    @js-wy8fg

    2 жыл бұрын

    Saturn lV? Did you mean Saturn V rocket?

  • @lastta1

    @lastta1

    2 жыл бұрын

    @@js-wy8fgHe means Soyuz rocket)

  • @solarpower09

    @solarpower09

    2 жыл бұрын

    Some electromech steampunk :)

  • @owenkegg5608

    @owenkegg5608

    2 жыл бұрын

    @@js-wy8fg Yeah, so used to seeing four instead of five. Oopsie. Edited.

  • @jonnyj.

    @jonnyj.

    2 жыл бұрын

    Guess what system f15's and f16's use today? Yep, mechanical gyros. Hell, even the f22 uses them. Military technology isnt as advanced as people think...

  • @MikeOrkid
    @MikeOrkid2 жыл бұрын

    This really makes me glad videos like this show up on my recommended section. Really rad to see how this in action.

  • @Midheimur
    @Midheimur2 жыл бұрын

    I can feel the smell of this trought the picture :D

  • @jhonbus

    @jhonbus

    2 жыл бұрын

    I can see the taste of it through the speakers.

  • @olsonspeed
    @olsonspeed2 жыл бұрын

    I have a Norden M7 vertical gyro, very similar sound when energized.

  • @barjan82

    @barjan82

    2 жыл бұрын

    Would be nice to see the unit running!

  • @phildawe7172

    @phildawe7172

    2 жыл бұрын

    Post a basic vid of it for the kids who've got no clue about that stuff

  • @user-yb2di7cb7f

    @user-yb2di7cb7f

    2 жыл бұрын

    @@phildawe7172 для детей сирот !!!

  • @Zt3v3
    @Zt3v32 жыл бұрын

    Gorgeous craftsmanship.

  • @hugoramos9481
    @hugoramos94812 жыл бұрын

    A great example of craftsmanship and engineering, those were amazing and exiting times for engineers ...... now is all fast simplified production to meet economical criteria. Thanks for sharing!

  • @GTfour01
    @GTfour012 жыл бұрын

    Very cool! Never knew how this instrument works. Now I do. Thank you!

  • @marcofreire
    @marcofreire2 жыл бұрын

    Damn that thing is a beauty. The sound, music to my ears.

  • @gustavgnoettgen
    @gustavgnoettgen2 жыл бұрын

    Always amazing to see. I used to think that gyros were much simpler.

  • @shuklavinays

    @shuklavinays

    2 жыл бұрын

    They actually are. But in aerospace they have to deliberately make everything sophisticated so that it’s rock solid and full proof operational for decades to come.

  • @davecrupel2817

    @davecrupel2817

    2 жыл бұрын

    @@shuklavinays Airplane mechanic here. *Redundancy* is the name of the game in aviation. NOT complexity. Aviation equipment isn't built complexely for the sake of being complex, as your comment suggests. Quite the contrary. If a simple system can be kept on an airplane, it is. The simpler something is, the less likely it is to break, and the easier it is to fix when it does. The so-called "complexities" you speak of are backup systems for those primary systems, in case the primary goes wrong. Some components have 3rd and even 4th stage redundancies. But most only need to be two. The idea being, not necessarily to make the equipment last as long as possible. But to get you safely to the ground, should something go wrong. If a car's ignition system stops working, all you have to do is glide to the side of the road, slow down and put it in park. Tf are you gonna do when you're up in the sky and your ignition system fails? A safe glide to some flat surface AIN'T a garantuee. So airplanes have *2✌️* ignition systems. Because the odds of both failing simultaneously are astronomical.

  • @JoeKyser

    @JoeKyser

    2 жыл бұрын

    @@davecrupel2817 I was just going to say redundancy

  • @davecrupel2817

    @davecrupel2817

    2 жыл бұрын

    @@JoeKyser damn right. The more and better your redundancies, the better your machine can catch it's own ass when it slips and falls.

  • @lucasrem1870

    @lucasrem1870

    2 жыл бұрын

    Gustav Gnöttgen German engineers, less parts? You can build them using LEGO! KZread, simpler?

  • @peterfitzpatrick7032
    @peterfitzpatrick70322 жыл бұрын

    As a retired machinist & electronics hobbyist, I LOVE to see electronics / Engineering interfaces... this did definitely not disappoint... 😎👍☘

  • @christopherleubner6633
    @christopherleubner66332 жыл бұрын

    Very cool to see you fire this unusual bit of kit up and make it actually link to the artificial horison indicator. 🤓 Awsome!

  • @jdlives8992
    @jdlives89922 жыл бұрын

    For a second my dog thought we were takin off ! Pretty sweet video dude! I want one

  • @user-sl3il5sz2s
    @user-sl3il5sz2s2 жыл бұрын

    Old Soviet military equipment. And a hundred years after a nuclear war, this mechanism will continue to function properly.

  • @user-sl3il5sz2s

    @user-sl3il5sz2s

    2 жыл бұрын

    @@j.bridges2921 Heh ... In many ways it is. In reality, the majority of the people of Russia regrets the death of the USSR, including young people. Of course, this nostalgia is not about the rigid system of communist ideology, but about that state. Many social decisions of the USSR were in demand even now. Of course, the Russians see the USSR from a completely different angle than the Americans. Our past is always with us.

  • @chichomancho1791

    @chichomancho1791

    2 жыл бұрын

    @@j.bridges2921 the remains of USSR still working perfectly! because they was made by ГОСТ.

  • @user-sl3il5sz2s

    @user-sl3il5sz2s

    2 жыл бұрын

    @@j.bridges2921 Yes, you are right, it has more to do with national pride and a sense of community. About Ukraine. Pay attention to my Ukrainian surname - my parents moved from Ukraine to Russia during the Soviet era. Ukraine at the collapse of the USSR in 1991 had a more developed economy than Germany. Now her economic development is worse than that of many African countries. Ukraine's population declined by 20% in the years after the USSR. About 5 million Ukrainians are guest workers in Poland and other European countries, and about 3 million or more in Russia. Etc. Ukraine is an extremely toxic asset, its occupation will be a millstone on its back. Everyone understands this, and of course Putin does not want the occupation of Ukraine. But! War in Ukraine is possible. It is possible in two cases - a military operation by the Ukrainian authorities against the rebellious republics in eastern Ukraine or the deployment of NATO (US) forces in Ukraine. In the first case, it is important that the eastern regions given to Ukraine in 1921 are totally inhabited by Russians. More than 700 thousand residents there have already applied for and received Russian citizenship, and more than one and a half million are awaiting the consideration of documents. Putin cannot ignore this and deny them protection, otherwise his support in Russia will collapse. In the second case, a US missile so close to Moscow is an existential threat. It is important to understand here that the conflict in Ukraine in Russia is perceived as a conflict with the US controlling it. In both cases, missile strikes on Ukrainian military infrastructure or on US missile launchers (like Israeli strikes on nuclear facilities in Iran) are likely, but not occupation. This is a very unlikely event, more likely the reciprocal deployment of Russian hypersonic nuclear missiles in Venezuela, Cuba and other countries hostile to the United States. And this is the real danger of the Apocalypse.

  • @grumpyken9151
    @grumpyken91512 жыл бұрын

    I guess this video was suggested to me because I tinker with vintage electronics and all I can say is that is absolutely awesome

  • @GearHeadBoris
    @GearHeadBoris2 жыл бұрын

    Very interesting. I had no idea they are so loud in operation. Good job getting it working 👍

  • @KeremCe

    @KeremCe

    2 жыл бұрын

    a hi-rpm rotor inside the gyro. this is the sound of that.

  • @KeritechElectronics
    @KeritechElectronics2 жыл бұрын

    That's some nice Soviet military tech :) I love the lead dress / cable harness, it's so clean and neatly made. Wonder if they used high flexibility cables, or just the regular stranded stuff.

  • @MrNikolab

    @MrNikolab

    2 жыл бұрын

    They use the highest quality stuff. The most precision components and best materials for military.

  • @luminousfractal420

    @luminousfractal420

    2 жыл бұрын

    standed or not i dont know but i have some of their silver solid core they used for communications (i used it for a custom headphone cable) fairly flexible but any tight turns would demand stranded as it would snap solid core. could be a clue

  • @luminousfractal420

    @luminousfractal420

    2 жыл бұрын

    @casper . the hind is a beast

  • @carmichaelmoritz8662

    @carmichaelmoritz8662

    2 жыл бұрын

    Nyet Nyet Soviet

  • @Tensquaremetreworkshop

    @Tensquaremetreworkshop

    2 жыл бұрын

    Almost certainly stranded. Lacing like that was standard practice in the period. Still have a reel of lacing cord somewhere...

  • @jabels4479
    @jabels44792 жыл бұрын

    Weird power requirements, 3x36VAC at 400hz and 27VDC. What an incredible mechanism though!

  • @MrBLAA

    @MrBLAA

    2 жыл бұрын

    Probably had 400hz generators on the plane (for radar and whatnot)… just coupled the gyro to the same power supply

  • @UhOhUmm

    @UhOhUmm

    2 жыл бұрын

    A lot of planes, submarines and other military hardware runs on 400hz.

  • @rickholmwood2000
    @rickholmwood20002 жыл бұрын

    To think all of those precision components working in harmony to give you one simple little gauge

  • @wayneschenk5512
    @wayneschenk55122 жыл бұрын

    With digital cockpits don’t hear it much but when I learnt to fly the gyros running down after shutdown brings back memories.

  • @bikemike2777
    @bikemike27772 жыл бұрын

    So that runs shy of 30v DC? Impressive piece of older technology you got there. That is awesome. Thanks for the video of a mechanical gyro

  • @barjan82

    @barjan82

    2 жыл бұрын

    It requires a DC voltage of 27V and an AC suppy of 3phase 36V 400Hz. The black box contains every stuff needed to run one or more instruments, an off the shelf 27V 10A SMPS and two 27V to 3x36V 400Hz solid state sine inverters, capable of 150VA output each.

  • @FixItStupid

    @FixItStupid

    2 жыл бұрын

    @@barjan82 Nice Work

  • @tosh4461
    @tosh44612 жыл бұрын

    Ivan: we need make thing to say what we point at. Dimitri: grandmother have the vacuum we use

  • @g60force

    @g60force

    2 жыл бұрын

    yes!

  • @fvgm
    @fvgm2 жыл бұрын

    Very nice piece of engineering. Today it can fit in a small piece of silicon. Thanks for this working unit

  • @qeijkak
    @qeijkak2 жыл бұрын

    I love the sound it makes when it starts

  • @torsion89
    @torsion892 жыл бұрын

    This gyroscope technology is still relevant today. Microcircuits will not withstand an electromagnetic pulse from a nuclear explosion, but a mechanical system will work.

  • @johnedwards1685

    @johnedwards1685

    2 жыл бұрын

    Very good point and pertinent in today’s threat environment too. It’s worth noting that a vacuum tube transmitter will still operate after an EMP, not much else electronic will.

  • @torsion89

    @torsion89

    2 жыл бұрын

    @@johnedwards1685 yes you're right. I'm from Russia myself

  • @krystiankrychu2507
    @krystiankrychu25072 жыл бұрын

    love the sound of it starting like gas turbine :D

  • @stretchhfab7315
    @stretchhfab73152 жыл бұрын

    That's just bad ass!!! Nice find ! Nice job getting it working

  • @derekkovari6641
    @derekkovari66412 жыл бұрын

    Sweet! its still working From that to a to a block on a computer chip Cool to see how far technology has come

  • @Theintruder100
    @Theintruder1002 жыл бұрын

    Reminds me of the ones I repaired/overhauled when I worked for Honeywell

  • @davidpalmer9780

    @davidpalmer9780

    2 жыл бұрын

    In a clean room with filtered, laminar flow air conditioning?

  • @Theintruder100

    @Theintruder100

    2 жыл бұрын

    @@davidpalmer9780 Yes indeed

  • @thecrazy8888
    @thecrazy88882 жыл бұрын

    What a beautiful piece of engineering. Incredible that today it's replaced by a single chip. Thank you for sharing!

  • @juliap.5375

    @juliap.5375

    2 жыл бұрын

    No. Chips only in cheap electronics like phones where nobody cares about precise and reliability. Jets and missiles still use professional gyros (mainly based on laser).

  • @sirrcharles1869

    @sirrcharles1869

    2 жыл бұрын

    Electro mechanical gyros are still used in modern icmb's. The Russian ones have better accuracy than any silicone without the need of gps

  • @gfr2023
    @gfr20233 ай бұрын

    Love this videos !!! we need more vintage equipment startup.. the sound of this machines is amazing

  • @barjan82

    @barjan82

    3 ай бұрын

    If you like this weird sound check this out 😂 kzread.info/dash/bejne/faN21a-yfKbegJs.htmlsi=dWxhnHGm7QJebfZ_

  • @gfr2023

    @gfr2023

    3 ай бұрын

    @@barjan82 yeah !!! that's what I'm talkin about :)

  • @jimfling2128
    @jimfling21282 жыл бұрын

    In the 1950's most of the instruments in B-52's were old vacuum type electronics. The DG and Attitude gyros were much smaller and self contained in the panel type. The older types with remote gyros were used on the B-17, B-25, B-24 and B-29 but the bomb sight (Norden) had it's own gyros and they were much more stable.

  • @savelevpetrtatoshka
    @savelevpetrtatoshka2 жыл бұрын

    Наследие Великой цивилизации😞

  • @dockkkerr

    @dockkkerr

    2 жыл бұрын

    Это не наследие, это следы.

  • @hrissan

    @hrissan

    3 ай бұрын

    @@dockkkerrэто точно, «прости, Юра, большую часть наследия мы проквакали»

  • @colsanjaybajpai5747
    @colsanjaybajpai57472 жыл бұрын

    Whoops I still have one of these and an roci and use PT500 to power it. Works fantastic

  • @barjan82

    @barjan82

    2 жыл бұрын

    How do you power the PT-500 rotary converter? It draws a stupid amount of power on startup 😀

  • @philips170t
    @philips170t2 жыл бұрын

    Amazing that engineers came out with that. Even magical when our phone can do the same thing now.

  • @zakit

    @zakit

    2 жыл бұрын

    True, but unfortunately greed and economics makes it that the phones don't last for more than 4 years, let alone 40 years.

  • @nataliamiliano150
    @nataliamiliano1502 жыл бұрын

    That sound is amazing.

  • @zakaroonetwork777
    @zakaroonetwork7772 жыл бұрын

    I miss that distinct sound. Id like to put one in my piper just for the nostalgic tone. How do you come by this peace of gear?

  • @MichaelOfRohan

    @MichaelOfRohan

    2 жыл бұрын

    Its usually auctions i believe, warehouses of government stuff approved for sale? Theres a few of these out there is the only reason I see them being purchased.

  • @visionary_8865
    @visionary_88652 жыл бұрын

    Amazing its still works like a charm. Russian tech as always sturdy and most reliable

  • @christianlucke4042

    @christianlucke4042

    2 жыл бұрын

    *military tech

  • @visionary_8865

    @visionary_8865

    2 жыл бұрын

    @@christianlucke4042 are you a typical american by any chance?

  • @visionary_8865

    @visionary_8865

    2 жыл бұрын

    Not all military tech is always reliable like spaceX rockets that disintegrate on ground. But this one is made by Russians so its built to last

  • @H33t3Speaks

    @H33t3Speaks

    2 жыл бұрын

    @@visionary_8865 Have you found all the pieces of the Kursk yet? 🤡

  • @visionary_8865

    @visionary_8865

    2 жыл бұрын

    @@H33t3Speaks well people have found pieces of U2 spy plane in Russia, people have also found PIECES of F-117 aircraft aka "not so stealth"😄😉. Well, about Kursk, i think it sank after being attacked by a Nato Sub

  • @Desertduleler_88
    @Desertduleler_882 жыл бұрын

    Amazing, reminds me of my flying days back in the 90's....

  • @raoulman1
    @raoulman12 жыл бұрын

    Thank you for sharing, that kind of things is always interesting.

  • @imNiao
    @imNiao2 жыл бұрын

    Да конечно очень крутая штука для своего времени. И удивительно, как в наше время выглядит МЭМС аналоги, которые стоят практически в каждом современном телефоне. Хотя наверное они не такие точные и надёжные.

  • @user-nk9yc7hr2m

    @user-nk9yc7hr2m

    2 жыл бұрын

    С гидроуровнем сравнивал мобильник, горизонт чётко показывает

  • @demiareu8741

    @demiareu8741

    2 жыл бұрын

    Начнём с того, что MEMS не аналоги этого девайса ни разу. Ибо они акселерометры, а это гировертикаль. MEMS'ы умеют эмулировать часть (!) функций гировертикали за счёт программной обработки, но не более того. Плюс программная обработка ведёт к накоплению погрешностей гораздо более быстрыми темпами, чем у гироскопов.

  • @imNiao

    @imNiao

    2 жыл бұрын

    @@demiareu8741 ну аналог я назвал условно, я конечно понимаю что не надо ставить "божий дар" с яичницой. Особенно аналог преобразовать в цифру, пусть даже на 24 битном АЦП с наложением всяких шумодавов и умных преобразований, которые как минимум накапливают и усиливают ошибки, на каждом уровне. Но как факт, что такое микро устройство даёт хоть какой то приблизительный функционал и точность в таком размере, если честно меня поражает.

  • @demiareu8741

    @demiareu8741

    2 жыл бұрын

    @@imNiao функционал - даёт. точность - не даёт ни разу. MEMSы не применяются ни в военной авиации, ни даже в игрушечных БПЛА - там они типа есть, но по факту идёт постоянная коррекция по GPS. Инерциалки на MEMSах никто так и не сделал (точнее делали но выходит УГ). Ну лазерный гироскоп не менее чудесное изделие :)

  • @imNiao

    @imNiao

    2 жыл бұрын

    @@demiareu8741 ну мне, к стати кажется что во всяких там китайских игрушечный квадрокоптерах как раз MEMSы стоят. А что касается "больших" летак, это конечно никто применять не будет.

  • @dougmapper3306
    @dougmapper33062 жыл бұрын

    The crazy part is that tech has come so far that there is a similar device in everyone's cell phone that tells it when to rotate the screen. Today they're microscopic and made from piezoresistors attached to suspended masses all made with the typical silicon photolithography process.

  • @AnalogDude_

    @AnalogDude_

    2 жыл бұрын

    Check KZreadr: Afrotechmods he has video on that subject, how ic gyroscopes works. He explains it as capacitance, a photo lithography fork shaped things on each of the 3 axis, since ic's contain metal oxide parts grown on there and metal plates generate capacitance. but these ic's also or some contain accelerometers, that's where Piezo technics might be use full.

  • @john91051

    @john91051

    2 жыл бұрын

    An accelerometer or a magnetometer is not the same as a gyroscope.

  • @AnalogDude_

    @AnalogDude_

    2 жыл бұрын

    @@john91051 ah, it's been a while since i saw Afrotechmods 's video, he indeed talks about accelerometer.

  • @atomicskull6405

    @atomicskull6405

    2 жыл бұрын

    @@AnalogDude_ Capacitance in the zeptofarad range.

  • @cogoid

    @cogoid

    2 жыл бұрын

    Another crazy bit of trivia: "Clean rooms" which are essential in manufacturing of integrated circuits were first invented in 19th century for production of miniature ball bearings, such as used in these mechanical gyroscopic platforms.

  • @crfsikness
    @crfsikness2 жыл бұрын

    Impressive bearings!

  • @wasimlhr
    @wasimlhr2 жыл бұрын

    Thank you for documenting this.

  • @PabloA64
    @PabloA642 жыл бұрын

    Amazing. I would like to see a V2 gyroscopic attitude controller. That ones had direct control over the carbon deflectors mounted over the rocket nozzle, giving some kind of gimbal control.-

  • @johnedwards1685

    @johnedwards1685

    2 жыл бұрын

    I’ve seen video of a V2 gyro in operation. It was taken to an aircraft instrument repair facility to be assessed and run up. It is on KZread somewhere. If I remember correctly, the gyro equipment was from a museum with a lot of V2 technology.

  • @superchiaki

    @superchiaki

    2 жыл бұрын

    @@johnedwards1685 me too!

  • @cogoid

    @cogoid

    2 жыл бұрын

    @@johnedwards1685 It's on "Astronomy and Nature TV" channel by Robert J Dalby.

  • @SuperJC65

    @SuperJC65

    2 жыл бұрын

    There’s a V2 gyro at the Alamogordo Space Museum in New Mexico.

  • @PT-ij9hc

    @PT-ij9hc

    2 жыл бұрын

    Nice video here!?..... kzread.info/dash/bejne/fYijycmNe8SffM4.html

  • @paulthompson2470
    @paulthompson24702 жыл бұрын

    So cool, I used to work on a development Buccaneer (XV344) which had a similar sounding BA gyro unit but about 2-3x the size of that and was oh so heavy. Then came a Ferranti FIN2000 Ring laser Gyro, 1/3 the size, much lighter and amazingly accurate.. but all still over 35yrs ago… (happy days..)

  • @dimontipper8599
    @dimontipper85993 ай бұрын

    АГД-1, на Ан-24 стояло две штуки, левый и правый комплект. В детстве отец приносил мне на разборку списанные приборы, именно такой я разбирал, и еще один лежит в кладовке до сих пор. На самолете запитывался от умформера, это электромашинный преобразователь с 27 вольт на 3 фазы 36 вольт 400 герц.

  • @user-kz8fi5nl5p

    @user-kz8fi5nl5p

    3 ай бұрын

    С этим гиродатчиком в паре должен работать указатель АГД--1 , а на видео у автора обломки автономного авиагоризонта АГБ . Работает только по тангажу , а по крену "птички"вообще нет .

  • @Guns_N_Gears
    @Guns_N_Gears2 жыл бұрын

    Totally cool to see that!! That thing spins serious Rip-em's.

  • @sapientsatellite
    @sapientsatellite2 жыл бұрын

    Those РЭС-22 relay modules were really ubiquitous. Didn't know they were used even in gyros.

  • @petrlicht

    @petrlicht

    Жыл бұрын

    I repaired a few AGD-1 458M gyro units. An error, or malfunction was always different. BUT ... Always РЭС-22 relay was bad !!!!! And 458M is full of them 🫣😐

  • @mthomson51
    @mthomson512 жыл бұрын

    Very nice video, thank you. I have a type 458 gyro and ADG-1 Indicator and a EP-15 3phase power supply. Any information you are willing to share on Pin outs/connections etc. would be greatly appreciated. I would really like to get this stuff running on the bench. Thank you

  • @barjan82

    @barjan82

    2 жыл бұрын

    Malcolm, i have an Excel sheet i made a while with the pinout and connection of the gyro block and remote instrument. How can i reach you?

  • @mthomson51

    @mthomson51

    2 жыл бұрын

    @@barjan82 I had forgotten but you sent me the spreadsheet a few years ago. I also discovered I have information from the connectors removed from the aircraft and have documented that too. When I have it running, hopefully soon, I will share. Thanks

  • @barjan82

    @barjan82

    2 жыл бұрын

    @@mthomson51 Great! Looking forward for your results. Only thing is to supply the unit with a real sine wave form power.

  • @user-nz6zo9px3v

    @user-nz6zo9px3v

    2 жыл бұрын

    Not ADG-1! AGD-1!

  • @jaxonblade1659
    @jaxonblade16592 жыл бұрын

    Now you have a beauty and heavy 3-axies steady cam.

  • @ztwntyn8
    @ztwntyn82 жыл бұрын

    That’s awesome. It looks like 1980s wiring and connectors also.

  • @redfelipe6565
    @redfelipe65652 жыл бұрын

    In my opinion it is not an inertial platform, but a gyroscopic artificial horizon. The inertial platform is something else.

  • @barjan82

    @barjan82

    2 жыл бұрын

    I have to agree with this!

  • @axelriet

    @axelriet

    2 жыл бұрын

    The inertial platform needs a gyrometer. This device is definitely not the whole IMU but it can be part of it.

  • @pcmasterwraith7676
    @pcmasterwraith76762 жыл бұрын

    can anyone say we want to see gimble lock?

  • @LiquidAudio
    @LiquidAudio2 жыл бұрын

    Awesome video, great job powering this up.

  • @mitropoulosilias
    @mitropoulosilias2 жыл бұрын

    very good demo of how the system works..

  • @user-dj9qi9jt1b
    @user-dj9qi9jt1b2 жыл бұрын

    Waiting for new video : launching mig21 R-60, air-to-air missiles, after 40 years of sitting.

  • @Techn0man1ac
    @Techn0man1ac2 жыл бұрын

    Это вам не MPU6050, тут всё серьёзно

  • @user-qr9fq6br8z

    @user-qr9fq6br8z

    2 жыл бұрын

    да это наша гравицапа.

  • @steelman4529

    @steelman4529

    2 жыл бұрын

    @@user-qr9fq6br8z вжух и на другой стороне галактики. Блин пересмотреть чтоль фильм.

  • @Techn0man1ac

    @Techn0man1ac

    2 жыл бұрын

    @@steelman4529 ку

  • @16mmDJ
    @16mmDJ2 жыл бұрын

    That startup sequence is sick

  • @michaelgrubbs1618
    @michaelgrubbs16182 жыл бұрын

    That is a pretty badass piece of engineering.

  • @alishanmao
    @alishanmao2 жыл бұрын

    thats a gyro? wow, now they have this whole thing in a tiny chip that eye can't see it

  • @death_parade

    @death_parade

    2 жыл бұрын

    Umm....no they don't. Modern Ring Laser Gyros are significantly smaller and more accurate but not on a "tiny chip eye can't see".

  • @death_parade

    @death_parade

    2 жыл бұрын

    To reiterate that we are talking about gyros used on fighter aircraft only, not INS on a MEMS type systems.

  • @DingleFlop

    @DingleFlop

    2 жыл бұрын

    In kinder terms, there's a huge difference between an inertial gyroscope, which are used in aircraft and a 9 axis IMU that you'd find in something like a smartphone.

  • @goku445

    @goku445

    2 жыл бұрын

    @@DingleFlop What would be the difference?

  • @justinmallaiz4549

    @justinmallaiz4549

    2 жыл бұрын

    @@goku445 yea big, expensive, unreliable. less accurate, and only 3dof with no acceleration measurements. - most likely Very cool thou

  • @stevejobs1653
    @stevejobs16532 жыл бұрын

    Круто! В русскоязычном сегменте ютуба такого не увидишь. Приходится искать в англоязычном.

  • @user-tn6tb9rl6c

    @user-tn6tb9rl6c

    2 жыл бұрын

    Русские его бы разобрали на драг метал.

  • @usteupidu1950
    @usteupidu19502 жыл бұрын

    Amazing that this things still ready for use..

  • @user-mp9ed8cp7m
    @user-mp9ed8cp7m2 жыл бұрын

    Love the sound of a gyro spinnin in the morn.

  • @bujablaster
    @bujablaster2 жыл бұрын

    Awesome! Pitch seems to be working fine, why there were no changes in roll on HSI when you rolled the gyro?

  • @barjan82

    @barjan82

    2 жыл бұрын

    This was only a very very basic setup with a part of a hsi that could only show the pitch information. To check how it shows the pitch and roll with the matching hsi instrument check the very short demo ath the end of this video: kzread.info/dash/bejne/qoBpyLxulLPJo9I.html

  • @anthonytidey2005
    @anthonytidey20052 жыл бұрын

    What a well built bit of kit. So small and reliable after 40 years. Russian engineering was as God as ours in the West. Unusually 3 x 36V AC was this beacuse of failure redundancy. I think 400Hz is the same frequency used on the DC3 and Grand Commander I flew on survey with it must be a standard for aircraft. Do you have any other pices of electrical or mechanical equipment from 40 or mor years ago. Thanks for the video.

  • @zaceryhammond1144

    @zaceryhammond1144

    2 жыл бұрын

    Small mate 🤦‍♂️ u should see one of today

  • @peterhoebarth4234

    @peterhoebarth4234

    2 жыл бұрын

    Anthony....., is the Earth flat , or a Globe ?

  • @m4rvinmartian
    @m4rvinmartian2 жыл бұрын

    Very satisfying that part of a jet, sounds like the jet when it starts up.😁

  • @marsbase3729
    @marsbase37292 жыл бұрын

    Though long gone, their engineering and craftsmanship lives on

  • @olegkurkachev3570
    @olegkurkachev35702 жыл бұрын

    И это в 1978 год 🔥🇷🇺👍

  • @amperemam5713
    @amperemam57132 жыл бұрын

    For something that's 40 years old and still working they don't make them like they used to

  • @akosmaradi5281

    @akosmaradi5281

    2 жыл бұрын

    Here's the thing. It hasn't been used for 40 years but its actually even older than that. crazy

  • @amperemam5713

    @amperemam5713

    2 жыл бұрын

    @@akosmaradi5281 yes I know that👍

  • @rickygrenadier6303

    @rickygrenadier6303

    2 жыл бұрын

    Soviet stuff was built to last

  • @LaurenceGough
    @LaurenceGough2 жыл бұрын

    Great video, so advanced for the time, wow!

  • @danted232
    @danted2322 жыл бұрын

    Cool video!! Made my night i love that sound!

  • @tomtsang8628
    @tomtsang86282 жыл бұрын

    I never though the gyro was separated from the instruments lol

  • @barjan82

    @barjan82

    2 жыл бұрын

    Depends on the system and manufacturer. Usually smaller units has everything in one box sitting in the cockpit. More complex artificial horizons may have a separate hsi in the cockpit and a sensing gyro block somewhere else in the airframe.

  • @jeremyortiz2927
    @jeremyortiz29272 жыл бұрын

    I missed the sound of an inertial gyro spinning up. The N-1 on RC-135s sounded the same. It took 28 minutes to fully spin up.

  • @wesleydonnelly2141
    @wesleydonnelly21412 жыл бұрын

    Wow what a cool piece of kit!

  • @ggsmith48906
    @ggsmith489062 жыл бұрын

    Ah! I love the sound of aviation instrument gyros spooling up!

  • @sircompo
    @sircompo4 жыл бұрын

    Very nice. Did you have a service manual to identify the pinouts and supply requirements or did you work that out yourself?

  • @barjan82

    @barjan82

    4 жыл бұрын

    Dave, supply requirements were strait forward as Soviet military instruments this era usually run at 27VDC for the servo amps and for a bunch of relays and 3x36VAC for the gyro motors and syncro transmitters/resolvers. Pinout for the supply input was easyer and follows some regular Soviet scheme i've seen on other instruments as well, first 5pins on the bigger connector carries both DC and 3phase AC supply inputs (1->GND, 2->27V, 3->PhW, 4->PhV, 5->PhU). The rest of the pins were including a bunch of head straching and lot of DC, AC voltage and oscilloscope measurements while the unit was running.

  • @sircompo

    @sircompo

    4 жыл бұрын

    @@barjan82 Awesome. Thanks for the info!

  • @barjan82

    @barjan82

    4 жыл бұрын

    ​@@sircompo U're wellcome! Take care about the 3phase 36V AC supply phase order on pins 3-5. The gyro block will run with any phase order conneted, but however if the gyro block is connected up with the proper 'display instrument' and the 36V AC supply phase order is incorrect the complete system will behave false. This is valid for both the 'type 458' gyro block and the AGD-1 or KPP-1273 display units.

  • @sircompo

    @sircompo

    4 жыл бұрын

    @@barjan82 I'm hoping to get a Smith's Industries horizon hooked up to a sim. I suspect it's expecting 3 phase 115v 400Hz supply for the synchros. Gonna be fun figuring that out! Suspect as it's a military part from a VC10 I'm not going to find service manuals!

  • @user-ul9zt2ww6o

    @user-ul9zt2ww6o

    2 жыл бұрын

    @@barjan82 а частота тока 400 герц?

  • @olegloginov6328
    @olegloginov63282 жыл бұрын

    I bet it will start up and run with the same accuracy in 50 years from now. That's just how the Soviets used to build them....

  • @owenkegg5608

    @owenkegg5608

    2 жыл бұрын

    Probably. That's the same reason that when I buy VFDs I buy ones that are Soviet Union surplus- they still work :p

  • @laheu
    @laheu3 жыл бұрын

    Good video. Interesting operation

  • @douro20
    @douro202 жыл бұрын

    Sounds like it's in excellent shape.

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