A jet in the works would travel four times the speed of sound—meaning a 90-minute flight from Paris to New York City or a 2-and-a-half-hour trip from Paris to Tokyo. ZEHRA is planned by the makers of the Concorde and would travel 3,125 mph, or twice as fast as the earlier jet, reports the Telegraph.
On top of that, it’s being called Zero Emission Hypersonic Transportation, as it would run on biofuel, hydrogen, and water. And since it flies outside the atmosphere, its pollution would largely stay in space. European maker EADS expects ZEHRA’s first commercial flight in 2050. CNN has details of a similarly speedy plane also unveiled at the Paris Air Show. Or click to read about a different futuristic jet, this one with see-through walls. (Read more plane stories.)