What price speed? That as much as technology or the lack of it will determine if a supersonic business jet reaches the market. Several start-ups have unveiled concepts, led by Aerion, a 10-year veteran of the sector, though still to cut metal. Boom Technology and Spike Aerospace are promising scaled subsonic prototypes this year; Aerion to name an engine partner. …

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OPINION: Supersonic business jets will be industry’s risk