the reason that the boeing SST was not built was not because they couldnt build it but because it was not financially feasible at the time (incidently, neither was the concorde). you can build airplanes for the technology advances or you can build airplanes that make money, both are needed.
numerous posts on this thread have implied that this aircraft is a joke because it is not supersonic. well if it were then it would be subjected to the same limited routes as the concorde.
one more point regarding how "revolutionary" this aircraft would be. let me ask a question; which would be a greater step forward (assuming that they bulid it):
a)737-400 to the A320 or b)A320 to the sonic-cruiser?
[This message has been edited by LMD (edited 03 April 2001).]