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Extreme Engineering - Transatlantic tunnel - Discovery channel

Yrys

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I'm doing an English oral (I"m francophone) on the " Transatlantic tunnel".
I've no idea when it was presented to television.

I've already have to much materials, so I feel the need to share... In class it
will be a 10 minutes video (first part) follow by 10 minutes of questions
we ask the class on it, etc.


Extreme Engineering: Transatlantic Tunnel


Extreme Engineering - S01E03 - Part1/5 - transatlantic tunnel


Extreme Engineering - S01E03 - Part2/5 - transatlantic tunnel


Extreme Engineering - S01E03 - Part3/5 - transatlantic tunnel

Extreme Engineering - S01E03 - Part4/5 - transatlantic tunnel

Extreme Engineering - S01E03 - Part5/5 - transatlantic tunnel


Litterature


Jules Vernes 1895
An Express of the future carriages
a short story on a "Boston to Liverpool Pneumatic Tubes Company"

and

Harry Harrison 1972
Tunnel Through the Deeps (1972); vt, A Transatlantic Tunnel, Hurrah!  ?
a novel of which you will find the first 2 chapters from his web site
on the above link.

Mr. Harrison is better know as the author of
"The Stainless Steel Rat Series" (very good one :)

Feel free to comment on the "project" itself :) .


From the first part video :

-3100 miles of ocean, most massive project of human history

-50 thousand tunnels sections, each weighting thousands of tons,
securing each to the ocean floor

-1 billion ton of steel, the combine output of all the steel miles for a year

- 12 trillions dollars (an estimated)

-100 years or more to complete, under extreme construction conditions


- 60 millions people cross the Atlantic each year, most fly, and it’s take
the better part of a day. The tunnel would shrink that to an hour, with
a train of 500o miles an hour (!!!)

-Live on one side, work on another one.


For myself, I'm sceptical.

Would would have the money to buy a ticket anyhow ?







 
Yrys said:
-3100 miles of ocean, most massive project of human history

-

I'd argue that sending humans to the Moon was the most massive project of human history.
 
SupersonicMax said:
I'd argue that sending humans to the Moon was the most massive project of human history.
I disagree.  Getting them there was easy.  Getting them back, alive, was the difficult part ;D

But these two projects are not easily compared, IMHO.  The moon mission was mostly a function of specialist engineering, mathematics, ballistics, etc.  Digging a tunnel from here to there is probably mostly hard labour, all backed up with engineering, and "what if"-ing the thing to death.  The pressure that far down, tectonic plate shifts, surveying a tunnel that would probably be dug from both ends.  But I wonder how a 500 MPH train can get from one side to the other faster than an aeroplane that can go faster? 

If one wants speed, I would offer suborbital transatlantic flights as the swiftest option.  Still, if a tunnel could be dug, just imagine...
 
Actually it is possible to move far faster (in theory) in an underground tunnel. The concept is called the Gravity Express and at peak velocity you would be zooming through the tube at about the same speed as an orbiting satellite. Since a Gravity Express needs no rockets or heat shields to start or stop, it is far more efficient (gravity does all the work). The basic principles were known as far back as the time of Sir Isaac Newton, but the engineering would require 22nd century engineering:

http://www.damninteresting.com/the-gravity-express

The Gravity Express
Written by Alan Bellows on 15 October 2006

A forty-two minute gravity train route from New York City to Hawaii. About four hundred years ago– sometime in the latter half of the 17th century– Isaac Newton received a letter from the brilliant British scientist and inventor Robert Hooke. In this letter, Hooke outlined the mathematics governing how objects might fall if dropped through hypothetical tunnels drilled through the Earth at varying angles. Though it seems that Hooke was mostly interested in the physics of the thought experiment, an improbable yet intriguing idea fell out of the data: a dizzyingly fast transportation system.

Hooke’s calculations showed that if the technology could be developed to bore such holes through the Earth, a vehicle with sufficiently reduced friction could use such a tunnel to travel to another point anywhere on the on Earth within three quarters of an hour, regardless of distance. Even more amazingly, the vehicle would require negligible fuel. The concept is known as the Gravity Train, and though it seems inconceivably difficult to construct, it has received some serious scientific attention and research in the intervening centuries.

The basic concept behind the gravity train is straightforward: At each end of the tunnel, an observer looking into the hole would see a downhill slope. If a train at one end of the tunnel were to release its brakes, the force of gravity would immediately pull the train downhill and cause the train to accelerate much like a roller coaster. Steeper slopes would result in more speed, with the highest acceleration occurring in the straight-down tunnels which cross the Earth’s center. The train would continue to accelerate until reaching the halfway point, at which time its inertia would be at odds with gravity and it would begin to decelerate. As Hooke’s data indicates, if the train operated in a frictionless environment it would reach the surface on the opposite end of the tunnel at the exact moment that its speed reached zero. Naturally, a gravity train operating in a real-world environment would need to bring along enough horsepower to make up the friction loss.

One interesting property of the Gravity Express is that its transit time would always be very, very close to forty-two minutes regardless of the distance travelled. In fact, if the Earth were a perfect sphere, the trip time would always be exactly forty-two minutes and twelve seconds. Greater distances would be traversed in the same amount of time as short ones because the train’s maximum speed would be increased enough to exactly make up the difference. Due to nature of gravity, this forty-two minute trip time would be consistent for any size of vehicle.

Consider a hypothetical Gravity Express station in Spain which connects to a sister station in New Zealand. The tunnel would be straight down because its route would intersect with the Earth’s center, making for an interesting departure as the train entered sudden free-fall. The vehicle would accelerate to a maximum velocity of about 17,670 miles per hour before beginning to decelerate, and it would travel in a straight line for 7,920 miles– a trip which would be 12,440 miles on the surface. Forty-two minutes after their stomach-turning departure, the train and its passengers would pull to a gentle stop at their destination on the other side of the world.

Though Robert Hooke and Isaac Newton corresponded on the subject of objects falling through the Earth, they did so merely as an intellectual exercise. The first serious suggestion to build a gravity train wasn’t put forward until the 1800s, presented to the Paris Academy of Sciences by a group of scientific optimists. Unsurprisingly, the Academy opted to defer the ambitious suggestion. The concept was lost to obscurity until the 1960s, when physicist Paul Cooper published a paper in the American Journal of Physics suggesting that gravity trains be considered for a future transportation project. Though the article sparked some lively debate, the proposal was not taken very seriously.

While friction does put a damper on the gravity train concept, clearly the biggest technical hurdle would be in creating such massive tunnels in the first place. A hole with a ten foot radius which passed through the Earth’s center would displace over twelve billion cubic feet of rock, all of which would need to be hauled away somewhere. Furthermore, the Earth’s mantle and core writhe with extreme pressure and heat, so any tunnel would have to be lined with a protective shield to keep it intact. Unfortunately no currently known materials can even withstand the hostile environment, let alone insulate the tunnel from the intense heat. Due to these extreme temperatures, the trip may never be survivable by humans. But the technology would be extremely useful for rapid, unmanned cargo delivery between continents, essentially becoming a massive global dumbwaiter.

Those who find sport in reflecting on such wild ideas have suggested that the tunnel could be evacuated of air to eliminate wind resistance, though such a feat would prove almost as challenging as the drilling itself. Some have also postulated that such a train could be magnetically levitated to eliminate friction in situations where the tunnel does not pass through the Earth’s center; though if electromagnets were used, the amount of energy consumed by the apparatus would rise drastically. A more viable location for the gravity train would be on planets such as the moon which are not troubled by an atmosphere, plate tectonics, and magma. The concept would be the same, though a planet with a density different from that of Earth would also have a different standard trip length.

Though the Gravity Express may seem impossible– or at best absurdly impractical– it is appealing to consider the possibility of extremely rapid transit across the planet with very little expenditure of energy per trip. Certainly the creation and reinforcement of such tunnels is well beyond the reach of our current technology, but the future is full of surprises. Modern technology has sufficient momentum that it might eventually carry us through to the other side of the problem, provided that we can reduce creative friction by opening our minds.
 
Yrys,

I watched the program, courtesy of your links, on Sunday.  Most interesting; I quite enjoy these sorts of programs.  Thank you for sharing. 

 
Even more extreme:

http://www.damninteresting.com/mediterranean-be-dammed

Mediterranean be Dammed
Written by Jason Bellows on 25 September 2008

The Strait of GibraltarIn the 1920’s the people of Europe feared the future as a dark, despairing place. Despite the loss of over five million Europeans in the Great War, the region was still plagued with the social maladies which had led to the conflict. The humans were maladjusted to the Industrial Age and the changes in labor which it spawned. To make matters worse, both scholars and soothsayers of the day postulated that world’s fluxing economies would congeal into two economic blobs: the Americas would unify into a wealthy super-state in the west, while the east colluded to become an enormous pan-Asian power. Europe would be left economically isolated, with a limited range of climates for farming and fewer resources at hand. Nowhere was the gloom thicker than in Germany where the terms of the Treaty of Versailles led to poverty and hunger for much of the population. It was in the midst of that dark time that an architect named Herman Sörgel devised a plan to preserve Europe through this daunting new worldscape.

Sörgel spent years promoting his scheme to save Europe: the construction of vast hydroelectric dams spanning the Mediterranean. The massive turbines would furnish a surplus of power, and the re-engineered sea would turn the life-hostile Sahara desert into a fertile wetland. In an era when it seemed technology could do no wrong, a considerable segment of the population supported Sörgel’s ambitious plan.

Herman Sörgel was born 2 April 1885 in Regensburg, Germany. Just after the turn of the century Sörgel began studying architecture in Munich. He submitted his doctoral thesis in 1908, but it was rejected. Five years later he turned in a fantastically similar paper. This time it was accepted, and so well received that Sörgel successfully expanded it into a book. From such events Sörgel learned a valuable lesson of persistence–it was a lesson that served him well though the rest of his life. He was working as an architect and journalist in 1914 when World War I broke out across Europe. His country engaged in hostilities, but Sörgel professed himself a pacifist, and did not participate. In the aftermath of the First War to End All Wars, Sörgel looked around at war-ravaged Germany, and worried for the future. Not just his future, nor his country’s. Sörgel worried for all of Europe. The forecasted Super-America and Pan-Asia economies prompted more fear: since the Americas spanned all the latitudes and climates, they would always be able to farm, and would eradicate hunger. With their legendary abundance of resources, the Super-America would need import nothing from Europe. The predicted Pan-Asian union presented the same problem with a distinctly oriental lilt. Europe would be helplessly sandwiched between these two behemoths–small, underfed, and under-powered.

Herman SorgelSörgel’s solution lay in the very thing that was leaving so many unemployed and destitute: technology. The pioneering footprints into the Industrial Age were still fresh, and the world was replete with a blind, loving trust of all things advanced. Electricity was the solution to all problems, and hydroelectric power was deemed cheap, exploitable, and renewable. As an architect of ambition, Sörgel was fed up with penny-ante dammed rivers. In 1927 Sörgel first published the plan he called Panropa. The plan he presented was meglomanically grand, but somewhat vague. Two years later a more detailed, but just as egotistical, version was unveiled was called Atlantropa.

Project Atlantropa proposed building a dam near the narrowest point of the Straight of Gibraltar, resulting in an eighteen-mile-long structure from Morocco to Spain. A second dam would halt the Bosporus river to block off the Black Sea to the east. Although some of the Mediterranean’s water comes from rivers, most flows in from the Atlantic Ocean. Water pushing through turbines would create power for all of Europe and Africa, and lower the level of the Mediterranean by more than 300 feet. 90,000 square miles of new land would be exposed in the area between beach front properties and the relocated beach.

The descended sea would also dry the waterway between Sicily and Italy, and a third dam from Sicily to Tunsia would serve as a bridge to allow travelers easy access to colonize Africa. Of course, before any such colonization, Africa would need to be “improved.” Yet another Atlantropa dam would be built across the Congo, swelling Lake Chad from it’s current state of “occasionally wet” to an inland sea of 135,000 square miles. The Congo lowlands would flood the “unproductive” forests, subsequently washing away uncounted villages, species, and indigenous people.

Sörgel extolled the virtues of his mega-project in four books, thousands of publications, and countless lectures. The massive supply of electricity would make nations share a single power-grid, and ease strife among countries by making them interdependent for their power. It would also, hypothetically, curb the European lust for war by providing an easy way for the dense Anglo populations to move south and displace the African natives. At the time, people in the Africkas were widely considered without culture, purpose, or productivity, and few Europeans harbored second thoughts about rearranging the natives without their consent. Sörgel and his supporters suggested that the colonization would be a boon to Africa, and provide water and work to the current population.

Map of AtlantropaMap of Atlantropa (click for larger view)Project Atlantropa garnered a cult following including designers who drafted plans, and financial supporters. As the media doted upon Sörgel as an engineering pop-star, he founded the Atlantropa Institute to promote the project. But for all the popularity, he was unable to get the project off the ground. In 1933 he took a proposal to the Nazis; if anyone had a penchant for construction on a grand scale, it would be them. Upon examining Sörgel’s plan, the Nazis flatly refused. Aside from the fact that the Nazis main interest lay away from Africa, the pith of Atlantropa was to benefit all of Europe, and that was something in which they had no interest.

Though the Atlantropa Institute managed to survive though Europe’s Second War to End All Wars, it gradually lost most if its funding, and it fell from the favor of the fickle public. Never one to give up, Sörgel passionately pushed the project for the rest of his life–a life that ended tragically on Christmas Day 1952 in a hit-and-run automobile accident. Reports indicated that Sörgel was bicycling along a road “as straight as a die” when he was struck. The car that killed him was never found.

Though the idea in itself was grand, most believe that it was utterly untenable. The construction of the Gibraltar dam would have required more concrete than the whole world’s production of the time. Some critics maintained that such a change in the world’s waterway would affect climate in unpredictable ways, though adherents argued that all of the changes–from redirecting the Transatlantic Flow to the alteration of the Sahara’s humidity–would be for the better. Perhaps the most strongly argued point against the enormous Terra Reforming was the casual conquer of Africa and its people.

In 1960 the Atlantropa Institute was dissolved, and its legacy left to the realm of science-fiction, where it can still be seen today.
 
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