A ground effect train is a conceptualized alternative to a magnetic levitation (maglev) train. In both cases the objective is to prevent the vehicle from making contact with the ground.
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China's Shanhai Maglev train is currently the world's fastest, able to hit 311 mph with a top operating speed of 268 mph. As proposed, the Hyperloop would more than double that speed.
Disadvantages of Maglev TrainsComplications resulting in accidents will usually lead to high human fatalities. Maglev trains are much more expensive to construct than conventional trains because of the high number of superconducting electromagnets and permanent magnets required, which are usually very costly.
The Maglev has significantly lower CO2 emissions compared too the traditional InterCity train at 300 kph, mainly due to its lower energy usage. At 400 kph the Maglev has almost half the CO2 emissions than an average motor car and a massive five and a third times less than a short haul airline flight.
The design of the guideway -- whether the German “T” shape for the wrap-around vehicle or the Japanese “U” shape with the vehicle enclosed -- ensures that the trains are safe from derailment. Today, maglev trains are generally considered to be among the most safe and comfortable rapid transit systems in the world.
Maglev trains are hard and expensive to build. They don't have a good safety record. There isn't established infrastructure to maintain the trains, or people who know how.
Maglev trains require very straight and level tracks to maintain high speeds. This necessitates extensive viaducts and tunneling, making construction costly.
Cost concerns over innovative railThe primary challenge facing maglev trains has always been cost. While all large-scale transportation systems are expensive, maglev requires a dedicated infrastructure including substations and power supplies and cannot be integrated directly into an existing transportation system.
Drawbacks of MaglevThis involves a very high initial investment (Coates, 2004). Even though guideways cost less than rails over time (Powell, 2003), it is hard to justify spending so much upfront. Another problem is that maglev trains travel fast, but they might not travel quite fast enough.
The Chuo Shinkansen is the culmination of Japanese maglev development since the 1970s, a government-funded project initiated by Japan Airlines and the former Japanese National Railways (JNR).
As noted above the Maglev trains are capable of traveling at speeds nearly twice as fast as the bullet trains. However, the use of such extreme speeds in commercial travel seems unlikely. Whereas Maglev trains travel at speeds of up to 400 or 600kph, bullet trains travel at a modest 320kph.
Maglev trains are “driven” by the powered guideway. Any two trains traveling the same route cannot catch up and crash into one another because they're all being powered to move at the same speed. Similarly, traditional train derailments that occur because of cornering too quickly can't happen with Maglev.
SNCF, widely regarded as one of the best high-speed rail operators in the world, has had 4 profitable years and 5 loss-generating years since 2012. The Shanghai Metro Maglev has never been profitable. Clearly, there is an issue with passenger transport. No mode of transportation can consistently generate profits.
Compared to highspeed passenger rail, maglev passenger rail consumes roughly twice the power per passenger kilometer. For commercial freight I found an efficiency figure of 520 ton-miles per gallon (660 kg-km/MJ). Assuming 70kg for the average commuter passenger this gives us an efficiency of (116 kg-km/MJ) for maglev.
There are only three countries in the world that currently have operational Maglev Trains: China, Japan, and Korea. Maglev trains are much more efficient than traditional trains and hold the speed record for trains (603km/h).
Due to the huge cost of running a maglev over very long distances, the hovering trains have been ruled out for the planned HS2 line connecting Manchester with London and Birmingham by 2033.
A series of German patents for magnetic levitation trains propelled by linear motors were awarded to Hermann Kemper between 1937 and 1941. An early maglev train was described in U.S. Patent 3,158,765, Magnetic system of transportation, by G. R. Polgreen on 25 August 1959.