NASA Has Started Construction of an Ultra Quiet Supersonic Plane
Breaking the sound barrier with less boom.
MATT WILLIAMS, UNIVERSE TODAY
8 APR 2018
NASA has a lot of experience when it comes to developing supersonic aircraft. In fact, testing supersonic craft was how NASA got its start, back when it still known as the National Advisory Committee for Aeronautics (NACA).
Beginning with the Bell X-1, the tradition of using X-planes and other experimental aircraft continues, and has progressed to hypersonic scramjets and spaceplanes (like the X-37).
https://www.sciencealert.com/nasa-has-started-construction-of-an-ultra-quiet-supersonic-plane
