A Trans-Global Maglev Train System?

January 22, 2009

What if there was a way to start the morning with a bagel and cream cheese in New York and make it to London in time for a mid-day sarnie, and then on to Tokyo for a sushi dinner, and then back to New York for a cup of decaf espresso and dessert? And without taking one of those suborbital space express services, a development  that futurists have been predicting is just around the corner for the past decade or so, or resorting to something as utterly, extremely outlandish as teleportation.

No, I’m talking about a mode of transportation that’s only moderately outlandish. What if we built a worldwide system of magnetic levitation trains, propelled by powerful magnets, which would travel at speeds of thousands of miles an hour through gigantic vacuum tubes tethered to the ocean floor and laid across (or buried underneath) the countryside? Keep reading...


Trans-global maglev train service would have some enormous benefits, and not just for dilettantes intrigued with the novelty of sampling the cuisine in several different countries thousands of miles apart on the same day.

People could work on one continent and live on another, which could open up all sorts of new opportunities for people in virtually every profession or trade. It would be possible to transport manufactured products, raw materials and food far more quickly than the conventional combination of cargo ships and trucks or diesel freight trains could, at a cost much lower than air freight.  And if the maglev system was powered with electricity from non-carbon sources—such as wind, solar, geothermal or nuclear plants—it might actually help us to reduce the rate of human-caused climate change without crippling the international economy. 


That’s why an intra-planetary subway be a good idea. Here’s why it also might be a very bad idea. Building a relatively simple above-ground maglev line with today’s technology, by the most optimistic U.S. government estimates, costs about $10 million per mile, so laying thousands of miles of giant tubes across the Atlantic would be fantastically costly.

Enabling large numbers of people to flit from continent to continent could turn epidemics into pandemics overnight. Making it possible to ship goods cheaply from distant countries might also make it more difficult for U.S. manufacturers to compete with low-wage workers overseas. And an undersea train infrastructure would be an almost unbelievably inviting target for terrorists.


That said, I really like the idea of being able to take a train around the world. When I was an impressionable kid back in the 1960s, one of my favorite comic books was the Classics Illustrated version of Jules Verne’s 1873 novel Around the World in 80 Days. Here’s the cover art, which shows Indians on horseback ambushing intrepid protagonist Phineas Fogg’s train as he tries to make his way across the Old West and back to London in time to collect a wager from his drinking pals. Thanks to the wonder of Google, I now know that the Verne’s fictional hero apparently was inspired by a eccentric real-life adventurer with the oddly appropriate name of George Francis Train, who in 1870 actually circled the globe in 80 days.

In fact, by 1892, Train did even better, managing to make it home and back in just 60 days via a combination of steamship and rail travel. (BTW, Train is a fascinating historical figure. He was instrumental in acquiring land for the Union Pacific Railroad, espoused vegetarianism and women’s suffrage, and in his later years publicly offered himself as a candidate for the post of U.S. Dictator, which existed only in his imagination. But as usual, I digress.)


A couple of years before Train took his last globetrotting trip, an explorer, military officer, politician and sometime land speculator named William Gilpin  wrote a book, Cosmopolitan Railway: Compacting and Fusing Together All the World's Continents, in which he espoused a trans-global railway as an innovation that would transform humankind:

The truth is that this world’s highway will so bring together and intermingle all the peoples of the Earth as ultimately in a great measure to obliterate race distinctions and bring about a universal brotherhood of man. It will tend to discourage war, and those systems of wrong and injustice which the most Christian nations have indulged in from the beginning. It will be to modern exclusiveness what the crusades were to human ignorance and human wrongs during the dark ages.

Okay, so that may have been overstating the case a bit. But Gilpin’s concept still resonates. The central part of his proposal--creation of a rail link across the 53-mile-wide Bering Strait between Siberia and Alaska—has long intrigued the Russian government.

In 2007, they proposed building a $12 billion undersea train tunnel under the strait, as part of a new $65 billion, 3,700-mile rail system capable of carrying 100 million tons of freight traffic from East to West and vice-versa each year. (Here’s a Bloomberg News article about the project.) The Russians also would include pipelines and power lines to enable them to sell oil, natural gas and electricity to North America.


The Bering Strait tunnel would be about twice as long as the “Chunnel”,  the underwater passageway completed in 1993 to connect the UK with the European continent. But it wouldn’t be the most ambitious feat required for a trans-global train system. That would be the Trans-Atlantic tunnel, an undertaking so mind-boggling that it seems like something Jules Verne might have dreamed up. But maybe not. Ernst Frankel, a retired engineering professor from Massachusetts Institution of Technology, and Frank Davidson, a former MIT researcher and co-founder of the Channel Tunnel Study Group, have devised an ingenious plan for such a structure that Frankel says is feasible from an engineering standpoint.  As a 2004 article from Popular Mechanics describes it:

….sections of neutrally buoyant tunnel submerged 150 to 300 feet beneath the surface of the Atlantic, then anchored to the seafloor–thereby avoiding the high pressures of the deep ocean. Then air would be pumped out, creating a vacuum, and alternating magnetic pulses would propel a magnetically levitated train capable of speeds up to 4,000 mph across the pond in an hour.

Here’s a graphic presentation that visually explains the concept, courtesy of the Discovery Channel’s Extreme Engineering  program.


Frankel and Davidson estimate that the Atlantic Ocean tunnel could be built for somewhere between $78 billion and $155 billion. That price tag, though hefty, no longer seems quite as daunting in an era in which the U.S. government is pumping hundreds of billions of dollars into banks that made bad investments during the real estate boom.


But over the long term, a global system of maglev trains would be vastly more environmentally friendly than our present carbon-based ground, water and air transportation, especially if we power it with electricity generated from non-carbon-based sources. The undersea portion, for example, conceivably might be powered by ocean wave energy, an untapped source with tremendous potential. Once the construction costs are covered, trans-global maglev might also turn out to be a whole lot cheaper than any other mode of transporting people and products, since Maglev trains moving through a vacuum would be vastly more energy efficient.


So what do you think? Should we build a worldwide maglev network, or is circling the globe in a train just too crazy of an idea? Express your opinion below.


About Patrick J. Kiger, Science Writer. Patrick J. Kiger has written from print publications ranging from GQ to the Los Angeles Times, and is a longtime contributor to Discovery.com, HowStuffWorks, and other web sites.

For several years, he wrote the Science Channel's "Is This a Good Idea?" blog, and we are proud to have him back! He's also the author of Science Channel's Story of the Week Feature and Creator of Head Rush Science Experiments for Kids.

Patrick is also the co-author, with Martin J. Smith, of Poplorica: A Popular History of the Fads, Mavericks, Inventions, and Lore that Shaped Modern America HarperResource, 2004), and Oops: 20 Life Lessons from the Fiascoes That Shaped America (Collins, 2006). Both are now available on Kindle.

You can see more of his work at www.patrickjkiger.com


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