Lerner wrote: Of course you have to dig very long tunnels
Perhaps the Helium beam exhaust of the Focus Fusion could be be used as a plasma torch to cut the maglev tunnels. The minimum rock to be vaporized would be around the circumference and a hole cut in the center to insert a rotary torch to cut out the back side of the rock plug. The rock plug would be removed mechanically, still a daunting task, I am sure. Or, we could just blast!
I am not familiar with tunneling techniques and am not sure how a fusion plasma torch could be incorporated into the operation.
