If you watch the video, and you should because it is good, it explains that a
lot of that has to do with the ever-hungering thirst for fuel efficiency in the
So that means that in the past few decades, manufacturers have moved away from
certain types of engines, like turbojets, and moved to others, like turbofans.
manufacturers compete on fuel economy.
barrier-shattering speed, for a long time. And even speedy subsonic jets, like
the Convair 880, are just ghosts of the past.