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SkyTran
SkyTran is a Personal Rapid Transit system first proposed by inventor Douglas Malewicki in 1990, and under development by Unimodal Inc. Lightweight two-passenger vehicles suspended from elevated passive magnetic levitation tracks are expected to achieve the equivalent of over fuel economy at or faster.〔("Maglev: A New Approach," ) Scientific American, January 2000.〕 A prototype of the SkyTran vehicle and a section of track have been constructed. Inductrack, the proposed magnetic levitation system for SkyTran, has been tested by General Atomics with a full-scale model.〔(Lawrence Livermore national Laboratory )〕 UniModal Inc. is now collaborating with NASA to test and develop SkyTran.〔http://www.nasa.gov/topics/nasalife/features/unimodal.html, retrieved November 1, 2010〕 A SkyTran system is being built in Israel as a pilot project. It is due to be completed in Tel Aviv by the end of 2015. Additional projects have been proposed and/or are planned in France, Germany, India, Indonesia, Malaysia, Pakistan, Saudi Arabia, Slovenia, the United Kingdom, and the United States.〔http://www.forbes.com/sites/trevorclawson/2014/10/23/sky-tran-targets-europe-but-can-it-beat-the-bureaucracy/〕〔http://io9.com/this-futuristic-looking-mass-transit-system-is-really-h-950593364〕〔http://money.cnn.com/2015/10/23/smallbusiness/skytran-air-taxis/〕〔https://www.techinasia.com/network-levitating-pods-change-urban-india-travels/〕
== System details ==
To minimize maintenance and make switching on and off the tracks efficient at high speeds, early versions of the system proposed using the Inductrack passive magnetic levitation system instead of wheels. Passive maglev requires no external power to levitate vehicles. Rather, the magnetic repulsion is produced by the movement of the vehicle over shorted wire coils in the track.〔 The cars would be driven by a Linear motor in the track or vehicle. Therefore, the system will have very few moving parts; primarily just the vehicle itself moving along the track, its parking wheels and door, and fans in heating and air conditioning units; so its promoters refer to the system as "solid state".〔(Solid state )〕
The passive maglev coils are enclosed and supported by a light shell called a guideway that also captures the vehicles mechanically to prevent derailment. Malewicki proposes a 3D grid design that avoids accident-prone intersections by grade separation, with guideways and their exit and entry ramps crossing above or below each other. Tracks will be supported above the ground by standard metal utility poles. They could also be attached to the sides of buildings.
After identifying problems with Inductrack and the cost associated with it, SkyTran described an improved design during a (Horizon BBC interview with SkyTran ) at NASA Ames in Mountain View, CA.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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