Nine years after Concorde flew for the final time, Gulfstream (GD), Boeing (BA) Lockheed Martin...

|By:, SA News Editor

Nine years after Concorde flew for the final time, Gulfstream (GD), Boeing (BA) Lockheed Martin (LMT) and Nasa are among those working on developing a supersonic business jet. Given that manufacturers have done size and opulence, says one industry expert, time is the "only differentiator left." A big focus of research is muffling the sonic boom so that the plane can fly over populated areas.