The closing of Aerion Supersonic and the end of the line, most likely, for its AS2 supersonic bizjet, is one of the least surprising turn of events in aviation history. Not only was it an ambitious goal to work toward the production of a supersonic bizjet, it was an impossible one.
Not that it’s impossible to design one of these aircraft. Hard? Yes. Impossible, no. We understand the nature of supersonic flight, and in the 50+ years since Concorde debuted, the powerplants for such craft have gotten way better, thanks to the development of jet engines for military applications. With them, supersonic cruise without afterburner is a very real possibility.