Douglas X-3 – Bell X-5 – Lockheed X-9
The Curator’s Choice 63
There is something romantic about the early X-planes. The whole idea began towards the end of World War 2 when various organizations in the United States, including NACA, the USAAF and USN, wanted to conduct research into high speed flight. The first X-plane was the Bell X-1 which was the first aircraft to break the sound barrier. Since then X-planes had been commissioned to test many areas of the aeronautical environment and many wonderful looking aeroplanes have flown with the X designation. So let’s look at three early ones.