Saturday, 1 August 2015


                                                               MAGLEV TRAIN (1979)

Magnetically levitated (maglev) trains glide above a track, propelled by superconducting Electromagnets. the principal is more than century old, but initially the huge electrical currents Needed to provide a sufficiently strong magnetic field were impractical. The breakthrough came When two physicists,Gordon Danby and James Powell, at Brookhaven national laboratory decided to Use high temperature superconductors as electromagnets. They obtained a patient for the technology In 1968, and by 1979 visitors to a transportation exhibition in Hamburg, Germany, where enjoying a Short test run on a Transrapid maglev train.

   Maglev trains need a guiding track and the carriages flat just above it. changing the field produced By the electromagnetic guideway pulls the train along. the only friction is due to air resistance, so Extremely high speed are possible. changes in field strength can produce very high accelerations, and Much more variable track gradients can be accommodated than with normal trains, so cuttings and Embankments would not be needed.
    There are serious disadvantage to maglevs. TMhe guideways are extremely expensive, and the train Cannot be diverted from the maglev track to normal railways to take existing inner city termini.

   Maglev trains were introduced in the united kingdom in 1984,linking Birmingham airport to the Nearby railway station. In china, another system links Shanghai to Pudong international airport. the Success of the TGV trains that run on normal tracks, however, has reduced the appeal of maglev.


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