I was thinking about the air cooled v12 with the 7 piece roller bearing crank and 3 camshafts. The drive train is also pretty sweet. This thing oozes cool from bumper to bumper.

Its little bit weird, because older Tatras (before air suspension) has inner wheels in the air without load. Only outer half of outer wheels has proper contact with road.

It's basically those VW "independent" suspension, but on steroid because it directly attach to large single pipe that act as main chassis (again, A PIPE) And on top of having the shaft and diff inserted to those large pipe frame, because they could

I was thinking about all the fuel we could save by powering these trucks with built in mini nuclear powerplants that drive them with steam and electric motors

no, I've been in paradox/confusion about it for a long time. Tatra calls/claims this to be their unique/iconic/signature centre tube chassis/powertrain design !!

yakutsk is no joke bro, coldest city on earth

I mean it was a diesel so they had no choice but to leave it running (atleast back in the day before glow plugs). After that much runtime a rebuild is understandable.

​@@oadkacould just park it in their living room?

That is BS. Go learn what the duties of every country was in the Comeconn. Aside that, the USSR imported almost nothing, they produced everything themselves. Only industrial product was busses from Hungary that they imported and some optics from the GDR.

​@@horeageorgian7766 From the pin to the reactor! ukposts.info/have/v-deo/q5ioZJWOf3l0uIU.htmlsi=qfT2IBQ278WBJBfC

@@horeageorgian7766 It's not BS. For example Czechoslovakia exported something like 11000 T3 trams into USSR. That's for that USSR imported almost nothing. Check here: en.wikipedia.org/wiki/Tatra_T3#T3SU

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and you invented the volkswagen beatle, design stolen by the nazis.

If anything I owned was one of the last of its kind, I'd use it carefully too!

What do you mean with one of the last built? You can buy a brand new 2024. Tatra truck right now..

OK, maybe you mean passenger car, those were made till early 2000.

@@cdjxwubcyex Yes, it was a car. I cannot remember the model number but he showed me a picture, it looked kind of boxy.

​@@Flies2FLL it probably was T700 or T613-4. They were brilliantly engineered - in 70's. As with other socialist products, Tatra never got funds to develop a true successor (and built proper, modern assembly line), and unlike Skoda, it was never bought by a western company that would implement modern technologies. T700 was last attempt to modernize the T613, but mid 90's luxury car without airbags, ABS and other safety systems, built on a 70's platform, never had a chance.

Its also great for offroad because the less weight on any given swing axle means far more positive camber which makes the contact patch smaller and increases surface pressure. You can see it in a lot of offroad videos weather they are loaded or empty - even wheels with pretty much no weight on them still dig in and find traction. That and the backbone style chassis which allows more lateral flex yet less longitudinal flex made them some of the best offroad trucks ever.

@@siraff4461 but tire wear had to suffer

@@tallll70 Without any cargo, tire wear is minimal. When loaded, the wheels would sit in a correct position.

@@justapeasant8949 i see, thank you... my dad actually drove Tatras for 35 years mostly 603s once while they asked him to drive 137s tankers during driver shortages, but i don't remember much details on big trucks

Reminds me of the Ford TTB front axle. They are ok to drive. Not the greatest road manners. Off-road guys like them.

The V12 was a platform for other engines. Later on, there was another V12 in the 813 and also 815 which was used for a V8 and a V10 development as well as a twin-turbo V12 variant.

The V12 even powered some small locomotives

Tatra make V18 too 😏

You can do that with Ford 7.3L Powerstroke engines too

Mechanical pumps are a helluva drug

@@calholli No you can't, They use HEUI injectors which need 3,000 (ish) PSI of oil pressure, So no oil means no start.

@@thebluebluestone I agree.. so there must have been at least a little oil in it. But it was off the stick and leaking everywhere and running wide open like that for 20 minutes doing burnouts and roasting tires and trying to break stuff. Also they hold four gallons of oil; so if you're really low, the oil will heat up like crazy, because it's used to running on that huge reserve.... and there was no water in it. The guy was even pouring beer down the intake and going nuts on it. lol. It wouldn't die

@@thebluebluestone Look up "stub truck" and "zip ties and biased plies" --- and look through their videos, and you'll find them trying to kill the 7.3L engines. They are virtually unbreakable for whatever reason. Partly because they are nerfed for power quite a bit when stock; and are just over built otherwise.. I've seen both guys pin it wide open and just leave it there.. and they just keep going and don't die. The zip-ties guy runs old used motor oil as fuel a lot of times; he'll just mix in a few gallons of diesel into a big tank of old oil and run it just like that. Runs great. I've seen a lot of people pour straight ATF transmission fluid into the tank also; helps clean injectors I guess............ and the guy running it out of oil was on the older IDI 7.3L engine anyway.. not the powerstroke

Fairly common even today in larger commercial vehicle engines (The Scania i drive has them) and pretty much standard in the big stuff like large boats and generators, the old Gardener engine in my boat design was made with heads in 1,2,3 and 4 cylinder sizes and they'd build a crankcase to fit whatever combination was required to get the right cylinder number.

@@popuptoaster the more you know!

@@popuptoaster Yeah, but I assume your in Europe.. In America, mfg... have bamboozled & did everything they can, to save a penny.. So your Diesel trucks are better spec wise, from what I've read...

My old turbo diesel Jeep has 4 heads, one for every cylinder. But they are not cheap.

@@V8AmericanMuscleCarsounds like they used a VM engine? VM used to use separate heads on all of their light Diesel engines as well.

We can see newer Tatras from time to time, the 815 mostly, but not much. However, the Tatra is a common fire department truck around here and that is so nice to see. Awesome trucks, though never had that pleasure to experience one

Yearly 80s. I was working in Tatra - assembling 8-10-12 cylinder engines many w/twin turbos.

Tatras are great trucks, I wish that I owned one of those 8 x 8 here in Kentucky.

It may seem simple now, but along with the engine, it was all cutting-edge tech in the 1940s for sure

God, it's an ugly car :D, certainly good and reliable but ugly :D

Wat zeg je nou man elke liefhebber van zwaar matrieel kent de tatra 8x8 in ieder geval

Ja, die wel. Ik bedoel de allereerste modellen met neus die hij hier laat zien. Die kende ik nog niet, jij wel dan?@@jetaddict420

Ik bedoelde de 111 en vroegere modellen. Ik kende ze nog niet, jij wel?

Thank you for the explanation, did not know that!

It looks like a great idea for simplicity (crankcase is one piece with no caps) but I see no way of providing bearing preload, which would be crucial in such a high-load area. They could have possibly used opposed tapered races with threaded internal nuts to provide said preload, but that would introduce more unwanted complexity to the manufacturing process. In saying all this, the author did mention that the battlefield lifespan was only expected to be 6 hours.

Their machining ability to hold a tolerance at such a large diameter through all seven main journals is the question, but for rolling bearings elements zero clearance is as tight as it gets. Less then zero or interference fit will quickly fail.

@@donaldhipple4921 all tapered bearings that take a radial load must have a preload. Think of wheel bearings for example. All materials have an amount of flex in them, thus why preload is needed; to allow the rollers to maintain full contact with the cup and inner race when within load parameters. Differential bearings are another example, with preload to the housing obtained either through shims or adjusting wheels. I'm a heavy vehicle mechanic with 29 years' experience, plus a Diploma in Mechanical Engineering. If a tapered bearing experiences any kind of clearance, it will wear in that one tiny spot where the rollers are contacting instead of spreading the load evenly across the race.

They don't seem to be tapered rollers. Plane rollers or balls are generally used in high surface speed applications. Zero clearance, only the outer shells will be clamped in some cases or press fit. Think wheel bearings on bicycles not trucks.

Pretty much any engine with a tunnel crankcase like the Maybach MD870. That had a 200mm stroke. The 6 cylinder version of the Tatra 111 engine used in Praga trucks could do 2100/2200rpm later on.

Old tech can be fascinting!

The 6 hour lifespan is a bit of a "joke", it's just based on the calculations done by Wehrmacht during WW2 expecting that, on average, it might only live for 6 hours before it gets destroyed by enemy fire. These engines are normally known for their surprising reliability. Many of the old 225 hp trucks made during WW2 were still sporting their original engines as late as the early 60s. Of course by that point most would get overhauled during which point they'd detune the engine down to either 180 or 200 hp to further increase reliability. Otherwise, the power output is more than respectable for an early 40s diesel engine. Also, it's not just weird from the US point of view, Soviet mechanics were confused by these, the USSR manual for these was literally twice the thickness of the Czech and German manuals. They made sure to explain how everything worked first so that the typical half illiterate Soviet mechanic used to solid axles and flathead gas engines knew what was going on. Compared to that, Central Europe was full of air-cooled diesel trucks, Czechoslovaks, of course, had the Tatra and also Praga (which used Tatra engines, their most famous Praga V3S had an inline 6 that was literally a half of this V12). East Germans had Robur, West Germans had Deutz and Austrians Steyr, all air-cooled diesels.

@@eozcompany9856 I thank you for this.

Tatra was in ocupied country during the war and people usually build everything as bad as posible for enemies.

6 hours at full RPM Is not bad! Try revving your car in First Gear for more than 15 minutes😂

There are still modern passenger trains around the Czech border and eastern Germany with gear changing transmissions powered by diesel engines. ODEG has some.

@@wytreeey3645 lol I wonder how does the clutch work and Is it a wet clutch or do they just have really low ratios to minimise slippage or what. Mind blown :) historically, trains might have been engine and electric and the motor directly powering the wheels, like in England. Thanks was even done on busses

@@tonyppe I only rode in these trains, and didn't see under the hood (so to speak). The transmission sounded like an automatic. So I'm guessing a planetary gearset?

Yes, once I will dedicate a video just for it

By today's standards, yes. But when you look at other diesels of the time, they had similar performance and longevity.

... in Siberia? Come on. They barely had enough concrete for that platform.

They don't need proper roads when they drive these trucks!

@@thatladfromthe40s82 aren't you embarrassed by posting such a stupid comment? Do you think what? The average Vlad drives a Tata to work in the factory? That the average Svetlana takes her kids to school in a Tata? That your babshuka drives a Tata to go to the market to buy potatoes? 🤦🤦🤦🤦🤦🤦🤦🤦🤦🤦

V8 one, 3.4L revving up to 12000 RPM The engine is just dangling there😊

@@bocahdongo7769 id rather have a square 4 cylinder diesel aircooled with crankshafts in opposed spinning order to counter the vibrations with supercharged induction of course...inspired by kawasaki H2 and Walterwolf RG, i will call mine Waltercat!😺👍

UKposts: Moto Guzzi with Tatra V8 engine

It is true