An curved arrow pointing right. Magnetic levitation — also known as MagLev — is used all around the world to power high speed trains. It's also the technology Elon Musk wants to use to power ...

The spaceplane will take off using a rocket-powered rail sled, which is about two miles long. This sled – which would sit on top of a runway – accelerates the Radian One to 537mph. But the ...