SpaceX and X-planes ?

musk get the secrets of Nasa for free of all X-planes ?

X-2 - High-speed and high-altitude flight

X-10 SM-64 Navajo missile testbed.

List of X-planes

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, which indicates the research mission within the US system of aircraft designations.

https ://en.wikipedia.org/wiki/List_of_X-planes

Most of the X-planes have been operated by the National Advisory Committee for Aeronautics (NACA) or, later, the National Aeronautics and Space Administration (NASA), often in conjunction with the United States Air Force. The majority of X-plane testing has occurred at Edwards Air Force Base.[1]