Non veni pacem mittere, sed gladium.
I really can't tell you why the SST programs were scrapped. It had something to do with a sonic footprint?
I recall it was cost. I'm not sure the French/English ever made money on theirs.
I have always wondered if the Concorde borrowed any design elements to the B 70.Layout seems too similar to be coincidental.=T.W.=
Extreme high speed vehicles tend to look alike because of aerodynamics.Cost was one factor, but the sonic boom at cruise was the real problem. The Concorde was restricted to supersonic flight over oceans and lightly populated areas. Boeing dropped their design because of the restrictions on flight paths. If people hadn't complained about sonic booms, we would be traveling in Mach 2 or 3 transports on long haul flights.Dave