Trains | Masters of Engineering | Free Documentary

in the early 21st century we take crossing the countryside at over 300 kilometers an hour for granted and yet high-speed rail is the result of two whole centuries of astounding invention engineering and technology which have shaken the history of mankind the greatest leap forward in speed ever made by man this is great matia bajo is an engineer and a teacher of mechanical engineering he'll be following in the footsteps of pioneers and inventors capable of overcoming formidable technological challenges to build increasingly powerful locomotives trace audacious routes across vast open spaces join continents and break every law of railroad common sense in the book hyperloop is straight out of jules verne it's tomorrow's world a scientific investigation hot on the tracks of stubborn visionaries driven by the ambition to become the masters of rail [Music] in the fog of england deep in the iron bridge gorge matia barrow's investigation begins [Music] this old mining region was once the cradle of the industrial revolution and amid the upheavals of the 19th century welcomed richard trevithick a brilliant engineer from cornwall who with blast furnaces spewing smoke in the background forged the cogs and shafts of an astonishing engine with little idea of how it would go on to change technology and human life forever [Music] incredible machine [Music] hello i was watching it from across the river it's amazing i love the mixture of giant cogs steam and smoke yes it's the first steam engine ever to run on a rail so every steam engine came after it were designed around it but this was the very first one great and how does it work well the fire is under there you have a boiler with water in it when the fire gets hot enough it converts the water into steam and that's what drives the engine can we try yes certainly yes [Music] it's awesome [Music] the steam and everything it's just awesome that's why the people were frightened of it when they first saw it oh yeah all the steam you can imagine why are you gonna say groaning and spitting out steam like a huge monster it's like a dragon and is that to control the steam this is for putting the steam onto the piston so the more steam you put on the faster you go it's like an accelerator on the car the boiler of a steam locomotive consists of a firebox where coal is burned the hot smoke from the fire enters a u-shaped tube the smoke box immersed in a tank of water [Music] when the water boils it turns into steam which then enters an airtight chamber the cylinder the pressure generated by the steam exerts force on a piston and sets it in motion when the piston stops a second inverted system sends steam into the cylinder the piston therefore keeps moving backwards and forwards pulling the crank an articulated shaft which transmits movement to the wheels the more steam and the more pressure there is the more power and speed is generated for the locomotive trevithick was the heir of james watt the renowned scottish engineer whose work on steam had already led to the invention of tools which could produce far more and far more quickly than humans or animals what speed could trevithick's engine reach well there's no actual definite information because nothing was right written down but it was meant to replace a horse a horse would walk pulling a ton wagon behind it at about four miles per hour so that's all he wanted to do so we assumed that his engine would do four miles per hour how do we stop it there's no brakes no brakes you must be very careful let it stop under its own weight okay georgina when you see this strange machine it's not your idea of a locomotive and yet it was the very first locomotive in history so to understand this curious form we really have to dig into the biography of richard trevithick his father was a mechanic for the mining area and he repaired and installed these steam engines so trevithick when he left school he had already been working with his engines at the age of 19 he was a mechanic so traffic he not only worked on these engines but he improved them and he created this high pressure steam engine so he put this steam engine on four wheels and he this is a road locomotive and he ran this through cornwall successfully at about eight miles an hour that's right trevithick was a brilliant engineer he would gather together parts on the work table and build like with an erector set objects that had never existed before that's the genius of great engineers not necessarily inventing but combining already existing technologies yes exactly but unfortunately there are problems with the wheels and he crashed into a wall [Music] the uncertain steering of the machine hindered its performance so trevithick had the bright and in the end obvious idea of using rails which had long been employed in the transport of heavy loads built a new prototype with new wheels and simply placed it on some coal mine tracks and thus the first train in history was born so on the morning of february 21 1804 a large crowd had gathered to watch this locomotive there were 70 passengers on it it had five wagons with 10 tons of iron and it took something like four hours to travel nine miles but they did it and at the finish line there was a large crowd there to cheer them on so much time for only 15 kilometers pretty wheezy but a huge revolution in transport it must have been his power of glory no not really sadly fame and fortune never came to trevithick on the same day the return journey of that locomotive the bolts broke the boiler flooded but in 1808 trevithick built another locomotive this was called catch me who can and it ran successfully for a few weeks trevithick opened his steam circus on a fenced-off circular track in london where passengers could take short rides on this new locomotive for one shilling but the weight of the engine broke one of the brittle cast iron rails causing a derailment and bringing a premature end to trevithick's experiments so without support and money trevithick he went to peru and he worked in the mining of silver there but when he died he was buried in an unmarked grave in fact the man who had the bright idea of putting a steam engine on rails was too far ahead of his time because the right metal hadn't been invented yet a pity because he had all the ingredients to start a real revolution he really had quite a sad history but he made railways a practical proposition the secret of rail is the contact between the steel wheels and the steel track meaning very little energy is needed to move extremely heavy loads steel is a material which is very tough so it's hard for it to deform and the contact surface between wheel and rail is very small this means there is low friction which is very specific to rail and this can't be matched by vehicles with rubber tires while trevithick had the smart idea of using the wheel rail combination his knowledge of steam remained underdeveloped was the lack of power his boiler was basically a cauldron and a cauldron can't produce enough steam producing almighty steam that became the next great quest for the first masters of rail and it was in france that a crucial invention would propel the railroad into a new era it's really impressive compared to trevithick's machine this is on a whole new scale this powerful engine was the invention of mark siger this remarkable engineer a descendant of the montgolfier brothers who was convinced that new modes of transport would thrust his century into the modern era designed a revolutionary boiler for the railroad cause in the belly of the locomotive not one but 42 tubes to heat the water this significantly increased the heat exchange surface between fire and water producing a lot more steam and thus boosting the engine's power [Music] the revolutionary multi-tube boiler would last until the end of steam traction it was still used in the last locomotives in service in the 1970s because no one had ever found anything better mark zuga had had a flash of genius when designing his boiler but the subtleties of mechanical transmission remain beyond his grasp [Music] mark sugan's locomotive was an archaic locomotive even when he built it because it lost too much energy in the transmission of movement by the connecting rods which worked vertically it was the british mining engineer george stevenson who would invent what can be called the modern locomotive his famous rocket on the rocket the cylinders were laid almost flat and instead of vertical connecting rods the cylinders worked directly on the wheels with jointed cranks this was much simpler and much more rational and at the rain hill trials in 1829 he reached 59 kilometers per hour and won the contest it was the fastest speed ever achieved by simply opening a tap on a machine an unprecedented achievement which fascinated many but worried a few adolf hitler adolf tier who was minister of public works at the time claimed that at speeds of 30 to 40 kilometers per hour the human body would decompose so he was formerly against such speeds but irrational fears like this wouldn't stand in the way of progress for long and nothing could stand in the way of the railroads either but modern transport society as a whole would be turned upside down by the rapidity of the railroad revolution [Music] before the existence of the railroad land travel didn't have fixed times stagecoach companies told passengers we leave at daybreak people saw sun up and said oh it's time to go catch my coach departure times were extremely valuable but the railroad would impose very precise times for management and safety reasons the railroad began to punctuate life to such an extent that the station clock replaced the church clock as the reference for thailand unifying regions linking them together and creating a country that was another role of the railroads the united states of america a myth a continent country from one ocean to the other untamed nature and natural obstacles [Music] a massive challenge for the fledgling railroad [Music] and it gave rise to a golden age of the railroad and the birth of the american nation denver colorado on board the california zephyr a legendary train that crosses the country from east to west in three days that's almost four thousand kilometers matia barrow will attempt to grasp the american railroad temperament after leaving union station the california zephyr makes a long slow climb through the freezing mists of the rocky mountains a first view of the continent's geographical diversity [Music] the california zephyr follows the route taken by the 49ers the pioneers of the mid-19th century gold rush it took them four to five months to cross from east to west in terrifying conditions fighting off the cold threatened by attacks from native americans and at the mercy of hunger and disease thousands of them died along the way [Music] ladies and gentlemen just for your information those going to roseville that stop will be a little after one o'clock for the california's effort as surprising as it may seem wealthy train travel enthusiasts can these days couple up their vintage rail cars on the back of the california zephyr to get a taste of what life on rails was like in the old days beautiful it's a really really big room and you'd never expect to see such a big table in a rail car it's uh exactly the way it was when they uh put it on the rails the first time in 1923. the president united states had a car like this franklin roosevelt harry truman this is the exact type of car they would have used rail cars with a platform mobile stages perfect for crisscrossing this vast country during a presidential campaign i i don't think you can really understand the country unless you see how big it is and if you take a train from chicago to san francisco bay you see out there what a big place this is uh and you see some of it like we're going through right now there's nobody there this is cowboy country and it hasn't changed 150 years to understand the country it's a good way to see after a journey of more than 40 hours the zephyr finally reaches its destination california [Music] an emblematic city in the development of the railroads in the united states the departure point for one of the most incredible human and technological adventures ever the first transcontinental railroad well the railroad is fundamental to the growth of america in the 19th century it's it's every bit as important as the as man landing on the moon was a hundred years later and starting with probably the very first day that railroads arrived people began talking about building railroads from the east coast of the united states to the west coast of the continent building a railroad across that required not only engineers to design and develop new ways of doing things and to make new kinds of equipment but also people to do things that were logically thought to be impossible it really is a remarkable story to fulfill this crazy ambition in 1862 on the request of abraham lincoln the u.s congress passed the pacific railroad act in order to create the longest railroad in the world a gigantic challenge in a country torn by the war of secession when i got to the station i noticed a huge mural depicting the groundbreaking of the railroad in sacramento yes that's one of my favorite murals and it depicts the groundbreaking on january 9th 1863 that began the transcontinental railroad but did you know that that actual event happened right on this spot right here right here yes it's really moving to be in the very spark but why did it all start here sacramento is the state capital as it was in 1863 but it was also at the time the center of financial activity in the state all of the gold from all of the mines in the gold rush ended up in sacramento in this epicentre of the gold rush four men wholesaler leland stanford iron forger charles crocker and general store owners collis huntington and mark hopkins joined forces to found the central pacific railroad company known as the big four this band of battle-hardened entrepreneurs gambled on the transcontinental railroad bringing them fame and fortune but it would be impossible to see this titanic project through without an army of experienced labourers [Music] when the railroad was beginning construction they quickly ran out of workers for a couple of reasons one was that a lot of white men left sacramento to go fight in the civil war back in the eastern united states and so there was a shortage of white workers but those that were left found that this work was very very hard it didn't pay as well as they wanted to so a lot of people actually left working on the railroad they abandoned their jobs the railroad was so desperate for workers that that the idea came up well let's hire chinese many chinese had come to california during the gold rush to to like anyone to get gold but because of the discrimination of chinese and the laws and and general attitudes towards chinese they couldn't have many jobs so leland stanford had this idea given to him and he said i i don't want to hire chinese but charlie crocker said well wait a minute they built the great wall of china i think they can help build a railroad and they agreed to take chinese on for an experiment to see if it would work within a couple of weeks they found out that the chinese were wonderful workers they worked very hard they worked long hard hours they worked for less money than white workers would work and they were very loyal the contingent of labourers on the central pacific railroad proved to be incredibly efficient and the laying of the tracks progressed at a frenetic rate nothing seemed to stand in the way of the big four's ambitions except perhaps nature herself [Music] just 100 kilometers from sacramento stood a daunting supposedly uncrossable obstacle the steep slopes of the sierra nevada mountain range we're going to come up to about 7 000 feet the the snow here is some of the deepest in north america this is part of what is called the sierra nevada batholith this giant mountain of granite that rises out of the earth phil sexton and mata barrow are heading to the top of the donna pass a spot etched in the american collective memory for the tragedy that occurred there in 1847 a group of pioneers heading to california on foot found the pass blocked by snow and was forced to spend the particularly harsh winter there half of them never made it out and some of the survivors even resorted to cannibalism [Music] this is this is the path so what do you think of crossing gas here you are now entering the great basin of the united states so you're now on the eastern side of the sierra nevada the donna pass as hostile as it is strikingly beautiful it's grandiose it's totally crazy to build a railroad through here crazy is a good description of building a railroad through this this country but it also fits the man who had it built the man who surveyed this route was known as crazy judah because of his single-minded determination to find a railroad route over the sierra nevada people called him crazy because that's real really all he would talk about as he wandered through town he kept pitching his idea he kept writing descriptions he kept coming into the mountains and exploring these routes but eventually drew up plans and he found backers who who helped him form the central pacific railroad company to help make his dream come true was there no other route from east to west apart from this one i see there were other routes surveyed but this was the best route because it really is the smoothest route which is really important for railroads because railroads are limited to a two and a half percent grade that is 2.5 meters and 100 meters yes that's the flip side of the coin of the wheel rail contact secure it was a genius invention because there's very little friction so you can pull very heavy loads with little power but at the same time you're losing locomotion when you're building a railroad through the mountains or really any road through the mountains you can either go around them or you can go through them but railroads unlike wagons cannot turn sharp and constantly they have gentle curves they need to meet so the answer here was to do tunnels and there there are 13 tunnels between immigrant gap in the summit and right here there's a group of tunnels it's very very interesting from here there is tunnel six and then tunnel seven tunnel eight tunnel nine and then so on and so forth all the way down to truckee as a series of tunnels and snowsheds because that allows the curve and the grade to be exactly right for a railroad and it's just a perfect line but piercing through the heart of the mountains was a tall order in protest at their appalling working conditions the chinese laborers caught a strike in retaliation charles crocker deprived them of food forcing them back to work in this railroad race to the east the goal became the very means of the conquest materials were transported as close as possible to the site on wagons pulled by locomotives on the freshly laid tracks ostentatious iron horses which became legends in their own lifetimes i love the colors of these locomotives this one's like a giant toy train with chrome everywhere it's hard to imagine an object like this pulling wagons it's more like a superb work of art this i think is kind of an expression of 19th century exuberance and i think the builders were so proud of them they wanted to be showy and show them off but also the engineers who operated this equipment they were assigned a particular engine they didn't own it but it was theirs and they polished and they customize their locomotives another thing that surprises me as an engineer are these small wheels at the front what were they for the large wheel and you can see it's connected to the drive shaft is what powers the locomotive and makes it move forward or backwards the two wheel sets in front and the two wheel sets in back are called bogeys and they are actually flexible [Music] bogeys are small trolleys with four wheels placed at the front and rear of the engine they provide a more even spread of the locomotives mass on the rails they're also fitted onto each wagon or rail car as free rolling units the bogeys are mobile compared to the chassis thanks to a pivot placed in the center so as the train comes into a bend the bogeys moves successively towards its center enabling the train to take the bend smoothly and with stability this is really important in the early days of railroading because much rail particularly in the race to build the trans-continental railroad was poorly laid it was uneven it was bumpy it was sometimes not completely parallel and it was sometimes wavy and by having these flexible wheels that would hang with the track it would help keep the trains on track but even today they're important safety measures for modern rail equipment [Music] the locomotives of the central pacific railroad company weren't the only ones to have taken up the trans-continental challenge a rival company union pacific also joined the venture starting from the east of the states they began laying their railroad track in omaha nebraska earning the city its nickname of gateway to the west a former union army officer grenville mellon dodge took charge of a new army this time of labourers made up of irish immigrants freed slaves and civil war veterans but while the vast plains of nebraska were perfect for laying flat track union pacific would encounter other difficulties the biggest problem for the union pacific was the concept of hell on wheels towns the towns were shacks and tents that were carried to the end of track on flat cars and then they would erect temporary cities at the end of track and these were places of incredible violence and immorality they had gambling houses they had saloons they had houses of ill repute with beautiful women but they were very very violent and very profanes so for every worker that was killed in accident building the railroad about four people were killed or injured in those hell on wheels towns but the other big issue facing union pacific was the indians the native americans who had lived on this land for thousands of years and the the natives were frustrated so they tried attacking the trains the railroad for the indians was part of the irretrievable change in the continent it destroyed their native ways of life and changed their ways of life forever in 1869 the rival tracks from the east and from the west met up but the companies lured by the prospects of huge profits continued their work alone and in parallel this absurd situation was finally brought to an end when president ulysses s grant demanded that the two railroads be joined together in the heart of utah at a spot called promontory summit well this is the famous photo of the of the laying of the last spike of the railroad and you notice that the engineers are on the front of the locomotive each with bottles and on the left side is water from the pacific ocean on the right side is water from the atlantic and this joined the two oceans by a ribbon of iron rail they had one section of rail that had not been laid and they brought in a special crew of chinese workers because of all of their hard work to lay these last two rails and bolt them in place and they set up a ceremony that involved a golden spike [Music] that's the symbol of america coming together and what it did was it joined the nation together from the east to the west and it made america genuinely a transcontinental nation what had been a four-month journey by wagon across the continent or a six-month journey around the tip of south america by boat became 10 to 12 days and quickly became eight days as rail travel continued it put america in motion europe also had its transcontinental ambitions trains journeyed from capital to capital pulled by increasingly powerful locomotives spewing out great clouds of steam and smoke across the vast plains of the old continent and the queen of these puffing dragons was the pacific 231 [Music] one of these sleeping majesties will soon come back to life [Music] 96 years old this rare locomotive listed as a historical monument in france testifies to the work of engineer andrei chaploin known worldwide as the genius of french steam it looks like the door of a safe here well let's crack the safe steam whose recipe lies behind the heavy door of the smoke box [Music] so explain the setup what's in the middle of the smoke box hello it's the exhaust hatch for the steam once it's done its job in the cylinders it's what makes the steam locomotives famous choo choo and it's also through here that the smoke and hot gases from the firebox are released and this is the extractor that's right when the steam is released it sucks out the hot gases from the firebox with it so it increases and improves the steam and what's this what you see here are smoke tubes like on the mark exactly there's something different though these tubes entering the smoke tubes these are called super heaters [Music] through these tubes the freshly produced steam passes into the boiler and rises in temperature to 350 degrees celsius freed of the least droplet of water this dry steam produces unprecedented power after adding these improvements locomotives with a horsepower of 2300 increased in horsepower to 3 500. and even more fantastic they use 20 less water and 15 less coal to bring this exceptional engine back to life allah and the other enthusiasts of the pacific steam club have been working tirelessly for almost 10 years adventure about to conclude with the first heating up of the pacific [Music] impressive sparks for sure [Music] we are ready to roll her out for the first time we'll see if she starts out [Music] [Applause] [Music] [Applause] there we go the old girl's wheels are turning excellent [Music] close it close it awesome [Music] [Applause] [Music] she's really rolling she sure is fantastic he has a reward for 10 years of hard work [Music] the pacific 231 reached new heights but in spite of all its technological improvements the locomotive seemed like a swansong of steam before the inevitable happened it was a very greedy engine and coal was very expensive it was also labor intensive as it needed two men on board and it took a full eight hours of work to heat it up before it could even get going so people began to question steam after world war ii steam began a slow decline in the face of competition from diesel locomotives and the development of electric propulsion [Music] electrification came with a high early cost because the infrastructures were expensive but this cost was soon written off due to the flexibility of electric locomotive fleets and the fact that you just switched them on and they went unlike all the time needed to heat up a steam engine but the electric revolution wasn't enough to perpetuate the train's reign over the world of transport for transport inside france there were suddenly the new motorways so cars on concrete and domestic airlines with planes that were comfortable more modern and faster so the railway authorities became discouraged rails seem to have no future but the tgv would change all that having first launched research into development into a turbo train fitted with a helicopter turbine the succession of oil crises led the sncf design teams to work definitively on electric propulsion [Music] one option was to follow in the wake of the japanese shinkansen the precursor of very high-speed rail travel in 1964. the tgv program was launched soon prototypes had passed the 300 kilometers an hour mark from september 1981 french people could travel from paris to lyon in two hours 40 minutes compared to the four hours before the tgv laid the foundations for a new concept in railroad engineering its articulated train topped and tailed by two engines one pulling the other pushing and its aerodynamic finesse would make the tgv a pride of french engineering and industry [Music] the tgv is the perfect synthesis of state-of-the-art technology and proven mechanics [Music] its wheels are slightly conical nearly identical to those on the early [Music] locomotives on a curve the bend radius of the outer rail is greater than that of the inner rail so the distance travelled by the outer wheel on the axle is greater than that travelled by the inner wheel but the two wheels on an axle turn at the same speed so this difference must be compensated for to prevent the train from derailing for this a simple solution was found [Music] to make the wheel slightly conical [Music] therefore on a bend when centrifugal force pushes the train outwards the outer wheel rises onto a section with a diameter higher than that of the inner wheel which simultaneously lowers itself onto the section with a smaller diameter thus the two wheels are able to travel different distances while turning at the same speed on the same axle on april the 3rd 2007 the tgv set a new passenger train world speed record of 574.8 kilometers an hour an exceptional performance accomplished by a tgv specially configured for the occasion with larger wheels and a shortened train [Music] in the space of two centuries rail speed has multiplied by 100 a crazy pace helped on by all-round excellence in civil engineering [Music] thus the channel tunnel inaugurated in 1994 with its 50 kilometers 38 of which are sub-sea means that now only 20 minutes separate britain and france a masterpiece of engineering now surpassed by an even more prestigious work [Music] the gothard base tunnel holder of a new world record 57 kilometers pierced through the heart of the swiss alps [Music] [Applause] we've just entered the longest tunnel in the world naturally the view will get a bit boring [Music] it's marvellous it's a bit like being in a science fiction film going through these straight tunnels we're traveling at 200 kilometers an hour and we have a true perspective which is very rare that's true with this track which is as straight as possible it's not perfectly straight but we have a visibility of eight to nine kilometers ahead [Music] it's impressive to think we're under the mountains right under the mountains we're 17 kilometers from the north portal where we entered so in 12 kilometers we'll have 2 300 meters of solid rock above us and the temperature of the rock at this depth is above 50 degrees celsius so at that point the temperature in the tunnel is just over 40 degrees 40 degrees yes 40 degrees and that's due to the 2 300 meters of rock overhead acting as insulation that's right no need for more no the insulation's good and there's no snow either [Music] starting in the north of the swiss alps and ending in the south the gothard based tunnel consists of two single-track tubes linked every 325 metres by connecting galleries this structure makes each section an isolated space and is a solution for evacuation in case of fire we're approaching the south portal [Music] then we'll see what the weather's like in ticino whether it's fine or cloudy like it was in the north [Music] there's light at the end of the tunnel wow it's amazing incredible you not only pass through a mountain but go from one region to another one weather to another welcome to ticino in june 2016 the longest rail tunnel in the world took 17 years to construct 10 of which were dedicated solely to boring through the mountains with the project's outsized moles 28 million tons of rubble were excavated in the boring of the twin tunnels combined 114 kilometers plus the connecting and maintenance access galleries now early in the 21st century all the ingredients of rail science seem to have been discovered [Music] is it possible for the train to progress even further if you were to ask me what a train would look like in 2080 or 2100 i'd say i'll show you and you'd probably be surprised i'd take and show you today's talis or today's eurostar these trains will still be rolling in 50 60 years rail in 60 years time will be the same as today for the train to evolve you put it onto it'd have to be a huge technological break from the current wheel and rail system in japan the 600 kilometers an hour barrier was recently broken by a new maglev technology prototype [Music] the term maglev is derived from magnetic and levitation it's a train that uses electrodynamic suspension the sc maglev is a train fitted with powerful electromagnets the length of its chassis all along the u-shaped guidance track are other electromagnets whose poles can be interchanged switching from one pole to the other means the train is alternately tracted and repelled by the track thus creating propulsion the faster the polar switch the faster the train goes at 150 kilometers an hour the train's rubber tired wheels retract since the magnetic field generated by the maglev as it passes levitates the train to a height of 10 centimeters but this state-of-the-art technology is so new it will require huge amounts of investment to deploy this system you'd need very high cost optimization france for example would never simply replace the existing infrastructure for a new electromagnetic suspension system the gains in speed would never compensate the huge cost that would be necessary and hyper speed cannot escape the laws of physics air friction increases considerably meaning powerful and energy intensive propulsion allows to solve the problem of aerodynamic drag the big temptation is to have trains traveling inside a tube in which a total vacuum or at least a partial vacuum is created that's pretty much the principle behind the hyperloop the hyperloop is a project dreamed up by the billionaire entrepreneur and engineer elon musk tests have been carried out since may 2017 in the desert in nevada and the first 1200 kilometers an hour passenger journeys should be possible in less than five years time [Music] hyperloop is straight out of jules verne it's tomorrow's world it opens up new possibilities because you might be able to travel 600 kilometers in half an hour and with all the advantages of a train rapid boarding city center to city center combined with the speed of a plane so if it works it's really promising for travelers a promise worthy of perpetuating the very special charm of a bicentenary adventure the world of rail is a world through the looking glass it's alice in wonderland when you enter a train station you enter a parallel universe taking a train even a humble suburban train is a huge adventure [Music] fear it sums up perfectly all the magic of rail that's so hard to grasp there are still plenty of people who can't help stopping to watch a train go by [Music] you

Channel: Free Documentary

Views: 87,151

Rating: 4.8610711 out of 5

Keywords: Free Documentary, Documentaries, Full documentary, HD documentary, documentary - topic, documentary (tv genre), engineering, engineering documentary, technology documentary, masters of engineering, railway, train, trains, train documentary, train tech, train engineering, train history, train technology

Id: e-HW2JhgAo8

Length: 52min 16sec (3136 seconds)

Published: Fri Feb 26 2021