As planned out, the Skreemr is a passenger plane, carrying 75 humans comfortably with rocket-like speed across the sea in mere minutes. It will also, in the designer's vision, be powered by clean electricity for the magnetic rail and by hydrogen fuel cells for the plane itself, as befits a largely hypothetical craft. Bombardier says, "the Skreemr concept aims to ignite your imagination around this idea," so don't expect to see it over the Atlantic this century. Still, similar designs may fly. This past summer, Airbus patented a plane concept that uses rockets, jets, and ramjets to fly near space and then plummet efficiently back to Earth, covering thousands of miles in just a few hours.