What is the rate that you’d expect for “any major advance in aviation”? Because that’s been very inconsistent over time. We went from the Wright Brothers’ first flight to a cosmonaut in orbit in just 58 years. For commercial air travel the time between the debut of the Ford Trimotor and the de Havilland Comet passenger jet was just 24 years.
Boom Technology is probably the biggest private company working on a supersonic passenger aircraft. They were founded in 2014 and currently have ambitions to introduce a passenger jet in 2029. I really doubt they’ll make that timeline.
