[867V309]

an 81 MILE vacuum tube filled with track, magnets and superconducting electrical cables, powered by dozens of nuclear plants (!)

but wait! it's built on the side of a mountain!

[MrDaddyLongLegs]

Sorry too late
From the same team as Thunderbirds mid 1960’s
I dont think Elon was born then !!!

Fireball XL5 https://www.youtube.com/watch?v=6ifS2nP53Zs

short video great song - enjoy