Denver-based Boom Technology's XB-1 demonstrator plane hit Mach 1.122 — 750 mph. It's the first independently developed ...

Denver-based Boom Supersonic's XB-1 demonstrator plane ... the jet was criticized for its inefficiency. Compared to a Boeing 747, the delta-wing Concorde guzzled four times as much fuel and ...

Sleek and aerodynamic, these models can achieve speeds that would give workhorses like the Boeing 757 nosebleeds ... It boasts a similar delta wing configuration, which can be all the better ...