Trans-Planetary Subway Systems

QPlusNews, Trans-Planetary Subway Systems 1978, Underground Tunnel Maps

“Describes a subway concept called “Planetran” comprising electromagnetically supported and propelled cars traveling in underground evacuated tubes, able to cross the United States in one hour.”

QPlusNews, Trans-Planetary Subway Systems 1978, Underground Tunnel Maps

“It is designed to interface with local transit systems, and the tunnel complex also contains utility transmission and auxiliary freight-carrying systems.”

QPlusNews, Trans-Planetary Subway Systems 1978, Underground Tunnel Maps

“They will be placed several hundred feet underground in solid rock formations.”QPlusNews, Trans-Planetary Subway Systems 1978, Underground Tunnel Maps

“It will require advanced tunnel-boring machines, such as hypersonic projectile spallation, laser beam devices, and the “Subterrene” heated tungsten probe that melts through igneous rocks.”

QPlusNews, Trans-Planetary Subway Systems 1978, Underground Tunnel Maps

“For every car being accelerated, there is one decelerating in an adjoining tube. The decelerating cars return energy to the system.”

QPlusNews, Trans-Planetary Subway Systems 1978, Underground Tunnel Maps

The tubes have a reduced atmosphere, making drag losses much smaller than for aircraft. Coast-to-coast energy costs are expected to be less than $1.00 per passenger.”

rand.org/pubs/papers/P6092.html

QPlusNews, Trans-Planetary Subway Systems 1978, Underground Tunnel Maps

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