The National Aeronautics and Space Administration's fabled X-plane series gained a new family member in June, when the agency announced it would put an electric airplane in the air by 2018.
For NASA buffs, it was big news. The historic experimental X-plane series has been shaking the foundation of aerospace technology since the announcement of the legendary X-1, which broke the sound barrier in 1947.
Here, we offer a peek at some of NASA's greatest, from Chuck Yeager's X-1 to the hypersonic X-15 to the abandoned X-30 and beyond.
Senior technical editor Chuck Murray has been writing about technology for 32 years. He joined Design News in 1987, and has covered electronics, automation, fluid power, and autos.