https://newatlas.com/hypermach-sonicstar-ssbj-concept/18974/
HyperMach has unveiled its SonicStar supersonic business jet concept that can cruise at Mach 3.5 at an altitude of 60,000 ft., allowing it to fly from New York...
supersonic business jetunveilssonicstarconcept
https://theaircurrent.com/aircraft-development/boeing-spirit-aerion-disband-engineering-as2/
Aug 10, 2023 - The stand-down by the plane maker and its largest supplier underscore the complicated strategic dynamics facing aviation's new entrants.
supersonic business jetengineering teamsboeingspiritdisband