Warplanes of the USA: Bell X-1, X-1A, X-1B, X-1C, X-1D, and X-1E, USAF
X-planes (NACA Photo) Bell X-1 being released from Boeing B-29 Superfortress. The X-planes are a series of experimental United States aircraft and rockets, used to test and evaluate new technologies and aerodynamic concepts. They have an X designator within the US system of aircraft designations, which denotes the experimental research mission.Not all US experimental aircraft have … Read more