The most overkill train ever built - USSR AA20 "Igor"

[@TaronTT]

This locomotive was actually named Andrey Andreev, as is writtin in cyrillic alphabet on the front (albeit being written as A Andreev)

[@SQSNSQ]

How stupid someone should be to see a word written on the very front of the thing and not even think it might be possibly a name of that thing? May be, as stupid, as to honestly believe, all elections in Russia are rigged? Or it is suffice to just be a Brit?

[@acanofbacon914]

@@SQSNSQ Who pissed in your cornflakes?

[@Usmodlover]

@@acanofbacon914 Nah he has a point, it’s pretty rude to just call a locomotive with an interesting history and a proper history a stereotypical Russian name while going “hue hue Russia rigg elections and ak-47 xDD”

[@physiocrat7143]

That would have been the name of the class. There was also ИС and ФД classes which were very successful.

[@malthuswasright]

@@SQSNSQ When was the last non-rigged election in Russia/USSR? But it is stupid to miss the name emblazoned on the front of the loco.

[@eggballo4490]

Igor: LOOKS LIKE THOSE TRACKS COULDN'T HANDLE THE NEUTRON STYLE!!!

[@pirytable]

The reason is simple: after the first one was delivered they did not pay anything. It was not according to the specifications of Andrei Andreyev. The AA20 was originally designed and built by Krupps as a 1-6-2(Russian designation) and not as a 2-7-2 configuration, this they did in Luhansk. Andrei only provided the plans and some simple design. After the build was finished in Empire Germany they toke the aa to the soviet and alter the wheel arrangement. The second kettle for a second AA20 was later transformed for a 53 (0001) DR locomotive series

[@IndustrialParrot2816]

union pacific was already pushing there track enough they coukdnt manage a bigger loco hence the fact the 9000 class was the largest rigid frame loco to ever see significent use

[@FunAngelo2005]

I read this in a russian accent

[@oatmeal42]

Every single fact about Igor is progressively funnier than the last

[@663rainmaker]

I like this page 📄 no BuLL MaLaRKeY EVRAZ Russia 🇷🇺 look 👀 close Lee EVRAZ Plc London United Kingdom 🇬🇧 champs at steel EVRAZ Claymont Steeel DeLaWaRe USA 🇺🇸

[@kaidimitri6933]

@@663rainmaker You having a stroke there bro? I didn't understand a single thing you said.

[@juango500]

@@663rainmaker u need help?

[@vladivosdog]

@@663rainmaker get lost

[@spumatei]

The locomotive's classification, "AA20" stands for: AA - Andrey Andreev, a soviet statesman, also the locomotive's namesake 20 - axle load in tons.

[@DrrZed]

>Never carried a name 0:40 It's LITERALLY on the front of the boiler, A.Andreev.

[@andya.4253]

Well, i guess he can't read cyrillic?

[@Ganliard]

Isn't it better to write it as "A. Andryeyev"?

[@annanowak2868]

That is the smokebox

[@AR-zq9hq]

@@Ganliard at least he didn't read it as Ahapeeb

[@ilaser4064]

I still prefer EEEEEGOR.

[@JohnnyMcJim]

Igor: "No one understands my case, you don't know how I suffer" Trainboy: "Rubbish, Igor. You're too fat, you need exercise"

[@ianwinfield929]

😂😂😂😂😂Genius 👍🏾

[@electricangel4488]

hey now not his fault no rails can hold him

[@maxxbrick]

this is beautiful

[@templar_1138]

That's a deep cut.

[@darthgamer9861]

I understood that reference

[@lawrence18uk]

Actually Russia originally had standard gauge, but after 'Igor' run on the Tracks, they ended up several inches wider...

[@sulphurous2656]

Ah, so that's why they did not have the standard gauge during the great war.

[@EllieMaes-Grandad]

As if . . . . the real story is typically 'Russian' . . .

[@johncolston4758]

No Russia built this locomotive AFTER they changed from standard gauge to their own national gauge of 1524 mm.

[@ace74909]

@@johncolston4758 i think it was a joke

[@VestedUTuber]

Most overkill ever _built,_ but not most overkill ever designed. There was a 2-4-4-2+2-8-8-2+2-4-4-2 Franco-Crosti dual-boiler monstrosity on the drawing board designed for broad gauge. This would have solved most of the issues "Igor" had.

[@petermikus2363]

Where did you find info about this i would love to look at it

[@VestedUTuber]

@@petermikus2363 www.douglas-self.com/MUSEUM/LOCOLOCO/francocrosti/francocrosti.htm Right between the German and Italian entries. It's just a concept plan, unfortunately.

[@petermikus2363]

@@VestedUTuber still cool and interesting non the less thanks

[@youneverknow111]

was readed somewhere there was even bigger loco than big boy:but cloundt produce enought steam

[@VestedUTuber]

@@youneverknow111 There was a quadruplex that was built by the Union Pacific once. It had trouble keeping up steam pressure even with superheating, but it was built out of a pair of smaller locomotives that weren't designed to produce that much steam.

[@jonathandowns8873]

Shrek: Do you think maybe the Soviets were compensating for something?

[@Optimaloptimus]

That had to have been otherwise why build such a thing?

[@stephenbanyar6763]

I'm sure they made up for it when the DP-27 LMG was made. 😂

[@tsm688]

@@Optimaloptimus Orders. "Build a ZZZ ton locomotive" "That would be impractical and not work" *Sent to gulag* "Next engineer! Build a ZZZ ton locomotive"

[@liam8236]

There population density

[@Optimaloptimus]

@@tsm688 Sounds about right.

[@ricklepick9148]

When I looked at that engine, the first thing I thought was, how does that even go around a curve. Turns out, it can't.

[@michaelwalter3399]

It should have been designed with an articulated chassis (hinged in the center)

[@skylark6167]

Actually it doesn't turn out, because it's too long! (ba dum tss)

[@stevencooper2464]

Maybe they should have promoted it as a track straightener: "Got curves in your tracks? We've got just the solution!"

[@charlesball6519]

@@michaelwalter3399 That would have made it a 4-8-6-4 instead of 4-14-4

[@james_appreciates]

Actually, the engine's name is Andreyev

A. Andreyev, actually.

[@russianbear0027]

Yeah it says so right on the front

[@MrTarmonbarry]

@ No , A.Andreev ,

[@vladivosdog]

APHAAEEEB*

[@james_appreciates]

@@vladivosdog **АНДРЕЕВ

[@OwlEye2010]

Much like the Erie Triplexes, the PRR Q1 and the Santa Fe 3000 class, "Igor" is one of those locomotives you'd never believe was a real thing until you saw pictures of it.

[@Jakob_DK]

The point of the triplex was also that it could bend.

[@garryferrington811]

Triplexes couldn't keep up a head of steam. Another odd one was the Erie 0-8-8-0 camelback, so hard to fire they had to change firemen every 8 miles. There were 4 of those. They did work, though.

[@1_railfan]

Well, you know what they say: "The bigger they are, the harder they fall."

[@sulphurous2656]

"The harder they hit!"

[@abloogywoogywoo]

_IGOR_ didn't fall, it just broke everything just by standing idle.

[@atlas1924]

*4005 cries*

[@1_railfan]

@@atlas1924 I'm sorry 4005.

[@timesnewlogan2032]

Just like the USSR!

[@TheTrueAdept]

That's why US monster locomotives went for articulated frames instead of standard ones. Another tidbit is that the fact that later US steam locos tended to split the driving wheels into two (or rarely three) sets to help with weight displacement.

[@themanformerlyknownascomme777]

he mentioned it in the begining (although he didn't mention it by name), it's based on the 9000 class.

[@miguelmederos8634]

BIG BOY

[@NitroFury]

And now you know why the Union Pacific Big Boys and Challengers were designed to be articulated.

[@crsrdash-840b5]

That's a very good point! America beats Russia once again with common sense!

[@jimtaylor294]

That and the [smaller but still large] British counterparts from the LNER & LMSR.

[@Lucius_Chiaraviglio]

Even so, the Union Pacific 4-12-2 (9000-series) worked fairly well.

[@davidrayner9832]

Only the front end of a Mallet was articulated. If that was such a great design, why don't modern diesels have their rear bogie as part of the frame with the front bogie on a slide platform instead of a central pivot so the front end hangs out as it goes around a curve? Because it's a bad design that should've been changed early in Mallet history.

[@Lucius_Chiaraviglio]

@@davidrayner9832 I basically agree, except that early in the history of the Mallet design, it was hard to pipe high pressure steam through the articulation, and the early Mallet locomotives were much shorter. But they should have changed it in the 20th Century, o better yet gone to a Bayer-Garratt design, which worked well in other parts of the world, but for some reason was never even considered in the US.

[@dog3783]

Union pacific: we have the biggest steam engine The Soviet back then: Hold my Vodka

[@ShadowScrub]

Union Pacific: You just wait until 1943.

[@Texassince1836]

The 3900s were of comparable size, and the 4000s were a size larger than Igor

[@Leatherface123.]

The big boy was way bigger

[@Youll_Love_It_At_Levitz]

@@Leatherface123. One of the only places "Igor" reigns supreme is that it had the most driving wheels of any non-articulated steam locomotive ever built.

[@eddharriselmedulan6187]

Not gonna lie the union pacific has the biggest success double bigboy engine but this soviet steam locomotive look like a joke remember everybody communism and trying to build something big try again but even successful

[@harrybarry2659]

If anyone in Russia reads this. This locomotive would have been a good addition for a train museum. A one of a kind giant.

[@Admin-gm3lc]

There was a russian diesel locomotive ДМ62-1727 put on ICBM carrier chassis. Truly a monstrosity

[@alexheredia8569]

The Soviet Big Boy as it's sometimes known here in the US. This locomotive was inspired by the Union Pacific Railroad's 9000 class 4-12-2.

[@radioactivedragon7143]

who has ever called it the soviet big boy?

[@garryferrington811]

That's a new one to me.

[@themanformerlyknownascomme777]

it isn't the soviet "big boy" that title goes to the P38

[@AndrewTheRocketCityRailfan4014]

The 9000s not only were better at traversing curves than the AA-20, but were also stronger than it. (9000s’ tractive effort was 97,000lbs, compared to the AA-20’s 71000lbs)

[@pirytable]

If the feeding of the coal would be higher and better quality, plus better track maintenance and better quality it would out run the 9000's and the big boy's

[@IndustrialParrot2816]

the 9000s were also faster since you know triple cylinders and gresley-holcroft valve gear

[@marty6779]

A shunting yard, somewhere in Russia, 1935 "Come on Dimitri, an engine has derailed, we have to put back on track" "Which engine?" "Igor" "...Oh. Oh No."

[@rorirocks6663]

The Soviets also tried making a Yellowstone 2-8-8-4 copy called the P38 in the mid 50s but decided to go with widespread electrification instead

[@channelsixtysix066]

That was sensible.

[@НиколайИванов-в8ы1я]

well they are a bit different

[@garryferrington811]

A better choice by then.

[@TheOhhblind]

The quality of this video is stellar mate. You're quite funny too. Enjoyed this.

[@atlas1924]

Big boy: I'm about to ruin this man's career

[@jonathandowns8873]

Big Boy: Oh never mind - it was dead on arrival anyway.

[@riesenflugzeug]

i like the part when he says "IGOR"

[@markwilliams8369]

Or should that be Eye-gor?

[@ConorDaRobin]

In awe at the size of this lad. *_A B S O L U T E U N I T ._*

[@SFStransit]

aka "A group of Soviet engineers got together in 1944, busted out a massive bucket of LSD and started screaming"

[@smollsaladhonestmistakes9493]

From now on this locomotive is known as “Igor” to me lol however, “Ivan” may also have been a good choice! Thanks for covering Igor lol

[@gazman1238]

What? Considering how terrible it was?

[@NoaZeevi]

But it’s name was Andrey Andreev! It’s written on the front.

[@agentsus9681]

@@NoaZeevi Is it like how an LNER A4 is called Dwight D Eisenhower?

[@henrytheriverengine8234]

The fact that most tank engines have a higher top speed than this beast really shows that good design is much more important than sheer size.

[@fireblow44]

Who ever said that it wasn't

[@martincraw7698]

That locomotive is bigger then Murdoch and Murdoch only has ten driving wheels.

[@zombieperk4807]

The large number of driving axles were meant to spread out the locomotive's weight, reducing the axle load and the resulting stress on the track. A group of Soviet locomotive engineers had visited the United States, and presumably they had seen the 4-12-2 locomotives being used by the Union Pacific. The 4-14-4 could be viewed as an expansion of that type. Unlike the successful Union Pacific locomotives, however, the AA20-1 was a complete failure. The seven driving axles were laid out 1.7 m (5.6 ft) apart, giving a very long rigid wheelbase of 10 m (33 ft). This required adaptations to negotiate curves. The center three driving axles were blind, and the first and seventh driving axles were fitted with lateral motion devices. These measures were not enough to make the AA20-1 work properly, however. It was prone to frequent derailments, and its large number of wheels made the engine too heavy for the track. As a result of its long wheelbase, the AA20-1 also spread the track and wrecked the points of the switches as it passed over. It was too big to fit on the turntables, too powerful for the couplers in use at the time and unable to run at full power for very long due to its undersized boiler.

[@thechineserussian]

Talk about a pleasant surprise. This video kept popping up in ny recommended so I decided to give it a watch and I'm glad I did. Very professional and to the point.

[@K-Effect]

I wish it was still around even just as a display

[@johnnypoker46]

I used to have a children's train book with numerous paintings of world trains, and one apparently was this locomotive. I always thought the front said 'AHAPEEB' but now I see that the second 'A' is actually the Cyrillic equivalent of 'D', so it actually reads 'Andreyev' when anglicized, as other commenters have already pointed out. Mystery solved!

[@MKtheinstrumentalist]

Any change you still have that book and could take a pic? The AA20's fairly obscure and depictions of it are scarce, so any contemporary media that references it would be an interesting find, even if it's a childrens' book!

[@johnnypoker46]

@@MKtheinstrumentalist No I don't still have it, I haven't seen it since the 1960s. It must have got beat up and thrown out. If memory serves, the AA20 might have been the frontispiece or title page of the book in question. I can remember several dozen of the paintings from two or three different books of the same nature, but they're all sadly long gone. They were probably British in origin since they were heavy on British trains (and I lived there at the time).

[@Heres_Domix]

I love how mad and Powerful you sound when you say IGOR

[@sjoerd5629]

You should always design a vehicle for the infrastructure you want to use it on. Not the other way around (unless you are building an entirely new infrastructure network anyway).

[@MannoMax]

The locomotive actually has A. Andreev written on the front

[@sevenlux7093]

"Never carried a name." It's name is writen on the front: A Andreev Those who can read have a clear advantage.

[@nicholasscott350]

Back in the 1970's, my parents took the Trans Siberian Railroad across Russia. The train stopped briefly in some Siberian town. There was a railroad yard located by the station. My father wandered over to look at the steam engines that were being kept warm with their fireboxes running at minimal operation. Looking closer, he could see the words "Union Pacific" on the front of the engines. They were sent over to Russia in WW II to be used for scrap to make armaments, but the Russians ended up using some of them. I don't know if the Russians adapted them to run on their different rails or made short lines that the engines were used on.

[@garryferrington811]

Interesting.

[@robertheinkel6225]

I read somewhere that it tended to just go straight when it came to turns. It only worked on the slightest of curves. It tore up a lot of tracks.

[@primrosevale1995]

Love to see someone make this design actually work.

[@Chopawamsic]

good god I never even knew someone was nuts enough to give a train 14 drive wheels on one wheelbase

[@BillFerree]

Union Pacific Rail Road Big Boy Class: First built 1941 16 Driver Wheels (4-8-8-4) Length: 132 Ft. Wight: 1,198,500 lb (543,630 kilograms) Tractive effort: 138,240 lbs (614.9 kn) Top Speed: 80 MPH 15 built Operated for 20 years. 4014 restored May 2019 and back in service. (en.wikipedia.org/wiki/Union_Pacific_4014) Just sayin'..

[@DistanceNsVeterans]

Heavier Than any Russian Locomotives.

[@Pensyfan19]

Nice video! I made a similar episode on this engine in my own locomotive series called Remarkable Engines. Just subbed!

[@DoubleX8620]

You just gave mt the best laugh i've had in a while and a small history lesson. Great work :D

[@roadwarrior114]

The Soviets: "Guys! Guys! We need to explain why our bigger version of Big Boy sucks!" Some mechanic: "Yo dude I got ya!" "WE BUILT A TRAIN SO BIG AND POWERFUL THAT IT DESTROYS THE TRACK IT GOES OVER! TAKE THAT YANKS!!"

[@witcherstudios9351]

Didn't Soviet Russia also make the TP1 Stalinets? The Diesel/Steam engine hybrid?

[@НиколайИванов-в8ы1я]

yes, most of these monstrosities are a byproduct of the early experimental era, so all kinds of wierd crap were coming out

[@keiranallcott1515]

You should do a video on one locomotive that was so bad , that one of the manufacturers refused to put its builders plate on it , the Australian wartime standard Garrett

[@jamiethedinosaur869]

“I am heavy train guy, and this is my train. It costs 400,000 dollars to drive this train for 12 seconds.”

[@electrik_loss]

Your content is absolutely superb, subbed!

[@user-bv7um1ds7y]

It does have a name, it's on the front of the smokebox for god's sake. It's in its designation AA it's Andrei Andreev named in honour of Andrei Andreevich Andreev, a famous revolutionary and politician

[@iankemp1131]

Anything you can do we can do better ... oh, well bigger anyway. Another great video from ToT, fascinating story and all in less than 3 minutes.

[@johntapp7232]

Diesel-electric traction brought about a most brilliant concept to railroading: Multiple Unit Operation. You can use as many locomotives as you need, make as long a train as you want, and you can place the locomotives any place in the train. You can even do switching duties in a yard via remote control.

[@skylark6167]

This was done frequently in the UK even in the steam era. Of course it did mean operating with two crews, but the limited need for this as well as tight corners and restrictive clearance through tunnels meant there wasn't really much point producing larger locomotives. LMS did use garratts for a while, and there were a couple of 2-10-0 classes produced, but double heading seems to have been far more common.

[@ErickC]

@@skylark6167 : Double heading was done in the US as well, but the original comment was referring specifically to the advantages of MU, not double heading.

[@RisingJake]

Thanks immensely for this one. I could never find any information about this thing besides a terse Wikipedia article. Cheers.

[@TTisIH]

You should do a video on the Baldwin Centipede! That's another REALLY oversized engine. 24 wheels!

[@Madhuntr]

I would still love to have an IGOR on my model railway. Sure I would hav to frequency replace my track whenever he is running around but that makes model railways fun. The work😏

[@c182SkylaneRG]

Not surprised this locomotive had so much trouble. The UP 4-12-2 that it was based on was already running into those same issues, and is literally the reason the Challenger 4-6-6-4 exists: the 4-6-6-4 is the 4-12-2 split into two "engines" with a slightly larger firebox so that it could better negotiate curves. The 4-8-8-4 was the result of wanting just a "touch" more tractive effort for the same routes.

[@davidsiler5505]

12 wheels? Ha! We build one with 14 wheels!

[@bluefoxy6478]

The difference between the UP 9000 class and the AA20 is that one was successful and were thought out, the other literally was to big to exist on its own metals

[@lordsnivyofnottingham2948]

That is because Union Pacific had practical reasons for their engines, so they were designed with care. AA20 only existed because the Soviets wanted to keep up with the Joneses.

[@garryferrington811]

The 9000's were intended for specific lines (not too curvy, but heavily graded) and purposes, and worked well, although the shops hated their 3-cylinder arrangement. I believe most of them were eventually simpled with no loss of performance. The survivor still has that arrangement.

[@mrmurpleqwerty4838]

0:06 Therapist: Russian Corn Train doesn't exist. It can't hurt you. Russian Corn Train:

[@1964catt]

So when are we gonna get an ho scale model if this loco

[@Planetkid32]

0:06, the Roblox picture of the gun, I can’t 😂😂

[@sangheiliwarrior86]

You could do a follow up on this featuring the Russian P38, but I'm not sure if there's much information about that locomotive.

[@DistanceNsVeterans]

What I could say is that the P38 was Largest and probably the only Model of its type to be built and in fact the only Russian Articulated to be Created. Tho it wasn't as big as the big boy tho.

[@Igor-sv6jm]

Everyone: talking about the engine Me: wait... THAT SH- HAS THE SAME NAME AS ME.... holy that sh- is stronk but is real easy to derail huh

[@Biblicallyaccurateseal]

How does it feel?

[@Abdega]

Are you easy to derail? Do you get distracted easily?

[@lmrstudioproductions6676]

This bad boy can pull 100 freights

[@nikitakipriyanov7260]

Why "Igor" when it was named after Andrey Andreev en.wikipedia.org/wiki/Andrey_Andreyevich_Andreyev ? It is his name is embossed on the front of the smokebox (see 0:58, this reads as А. АНДРЕЕВ) "AA" in AA-20 designation also stands for Andrey Andreev. See also en.wikipedia.org/wiki/4-14-4 .

[@thekid9992]

Loco manufacturer: What specs would you like the loco built to? Russia: yes.

[@johntapp7232]

The reactive effort-was it starting or continuous tractive effort? If it was starting tractive effort, a 1953 General Motors SD7 locomotive (EMD) had a starting tractive effort of 45 tons-the ones equipped and ballasted for mountain operations, versus 36 tons this one. We have made machines-steam, diesel and electric-that are more powerful in a smaller size.

[@fishpop]

So "Igor" here is the loco equivalent to the conceptual tank: Ratte. Both were theoretically impressive but were just too damn big to be of any use.

[@lupanebektianlines]

Was there are bigger whyte notation that was built?

[@voltsiano116]

"Look, MY engine is perfectly designed, even if it's a shunter."

[@DerekWalsh-l4i]

No book or film I have ever seen of this locomotive, in over 60 years, has ever referred to it as "Igor." I think you have invented that just for KZbin.

[@alcopower5710]

Excellent content 👍

[@Wheeljack214]

"You think he's compensating for something?" - Shrek, 2001

[@superstepno835]

What’s name of that soundtrack

[@joelwatkins]

I'm sure it would've been right at home in America alongside the "Big Boy" 4-8-8-4

[@Lucius_Chiaraviglio]

More like alongside the Union Pacific 4-12-2 9000-series (the Big Boys came later). If you re-gauged the AA20 to standard gauge, it might have even worked okay on Union Pacific's track, apart from the lack of steaming -- I suspect that Soviet track just wasn't up to handling a locomotive like this, whereas Union Pacific's track obviously was.

[@penninefilms4714]

Fantastic channel. :)

[@TheOneThreeFour]

I G O R

[@dragonzilla6482]

Can you do a video on Russia’s Streamlined Locomotives?

[@JackCarsonsRailroadVideos]

The way he Said IGOR!!!!!! HAD ME DYING FOR 10 MINUTES 😂😂😂😂

[@caydenworley5002]

Next Train simulator 2022 Locomotive. I’m curious though how much stronger is this locomotive than the U.P 9000, If I can suggest a video, how about the PRR S2 Steam turbine.

[@sebastianplodek2100]

Igor and big boy, that would be a perfect rivialship.

[@Joe-tu5qw]

Ay MTH, since Lionel ain’t doing anything…nows your time to shine.

[@A_sad_sad_loco]

Some reasons are also aplied to the hungarian class MÁV 303 like being to heavy for the rails. Only 2 were made the scondone being preservd and the firstone being scraped after a derailment.

[@fresagrus4490]

If it doesn't have a name, what is the "Andreev" written on it in some of the pictures?

[@michaelwalter3399]

The American example pictured was the 2-6-6-6 Alleghenny built by Lima Locomotive Works. it was built specifically for the Pennsylvania and named for the mountain range that made up much of that road's main line.

[@pontiacguy5190]

Pennsylvania railroad never owned an H8 Allegheny. they were built for C&O and Virginian. Pennsylvania didn't like articulated locomotives. they even borrowed an A class from N&W, but chose to go with 10-coupled non articulated locomotives instead.

[@garryferrington811]

Correct.

[@OfficiallyANerd]

In Russia train doesn't bend around the track, track bends around the train.

[@Blue_Puffball]

Anyone know what music he used?

[@KEITGAMER]

Hey "Big Boy" from Union Pacific is equal big, or?

[@justandy333]

At that time in history it was literally 1 big game of 1 upmanship. No matter how niche the subject, the Russians just had to try and go bigger and better. Kola Deep, Concordski, Typhoon Sub, Kirov Battlecruiser, Antonov AN225, Buran, TU160 Blackjack, TU116 Airliner, This... The list goes on.

[@tonytins]

I'm pretty sure Russian railway engineers were absolutely furious when they saw the success of Big Boy. Had they only waited. xD

[@theblackbear211]

The 9000 series locomotives (the American locomotive shown) were a curiosity even in US railroading - they had some of the same issues - too long a rigid wheelbase limited their usefulness, but they also had the distinction of being 3 cylinder engines - the center cylinder angled in order to connect with a crank on the 2nd driving axle. They also, notably, used Gresley's conjugated valve gear.

[@lyokianhitchhiker]

Hey, Gresley knew his shit when it came to solving problems in engines

[@darylcheshire1618]

Says a lot for the Garratt design where the water tank, boiler and tender were on separate units that were joined together and the water tank and tender had their own driving wheels.

[@cadespencer6320]

Igor would have been perfect for Australia since they have the worlds longest stretch of straight track

[@lindsaydonovan6241]

Litterally laid in sand.

[@TrevortheTrainFan]

I remember reading about this locomotive from a website somewhere. It was very interesting.

[@CaptainLumpyDog]

And that, kids, is why your large locomotives are articulated!

[@TroelsBusch-yz1jv]

The reason why i Call the AA20 Andrey Andreyev is because a Soviet politician of the same name has sponsered it’s construction.

[@GiordanDiodato]

to make this thing even bigger, it used 5-foot (1524 mm) gauge that Russia used at that time. Meaning it was FAR bigger than any American steam locomotive.

[@ViggoLindgren7bFörslövsskolaF]

now when thinking about it Igor's only real problem was that he couldn't produce full pressure and the rest of the problems was the railway so Igor was really a fine locomotive

[@TheMrPeteChannel]

The VTR was invented by a American. It was made in America from American parts. The company that made it (AMPEX) was however started by a person born in Russia.

[@jazzybelleverdonwilliams4978]

You should do one on the NSWGR D57