Monorail made from wingless airplanes

Dan sez, "it remains to be even prototyped, but this company has plans to convert old airplane fuselages into hanging monorails."

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The actual Tram car is constructed from de-commissioned Boeing 727's, 737's, and 757's that are stripped of their wings, engines, and tails.
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The fuselages become compartments equipped with solar cells and battery storage.
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These compartments are attached to a rail system by permanent magnet regenerative motorized wheels.
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Power is provided through solar electricity, wind power, regenerative breaking and fuel cells.
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The system of single rails is hung from suspension cables, made level with support cables.

Link

(Thanks, Dan!)