Part of the NASA technology demonstrators, X-31 was designed to test thrust vectoring technology by using a delta wing, canards, and vectored thrust from the engine. Designed and built by Rockwell and ...

Transonic truss-braced wing project is on hold after Boeing proposes to investigate a simpler, thin-wing design.

Boeing and NASA are to pause development of the X-66 flight demonstrator to focus their research on the evolution of long, ...