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 200 miles per US gallon (240 mpg_‑imp; 1.2 L/100 km) fuel economy at 100 miles per hour (160 km/h) or faster. A prototype of the skyTran vehicle and a section of track have been constructed. The early magnetic levitation system, Inductrack, now abandoned by Skytran, has been tested by General Atomics with a full-scale model. UniModal Inc. is now collaborating with NASA to test and develop skyTran. A skyTran system is being built in Israel as a pilot project. It was initially projected to be completed in Tel Aviv by the end of 2015. As of January 2016 work is ongoing with the test demonstration track. Additional projects have been proposed and/or are planned in France, Germany, India, Indonesia, Malaysia, Saudi Arabia, Slovenia, the United Kingdom, and the United States.

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".

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