>>1904316Go to former USSR, there are still a lot of Yak-40 and Yak-42 trijets in service. Additionally, Tu-154 aircraft are in charter operations.
>>1904330I honestly think that Boom is pie in the sky. They have been touting their quiet supersonic claims for many years now, but we have yet to see the XB-1 fly. I see the future trending more towards aircraft like the Otto Celera, if Otto's claims are substantiated, there will be a breakthrough in aircraft efficiency, meaning that airliners might only need a single engine like a CFM-56 or IAE V2500 in order to reach cruising speed and altitude with the same or greater capacity as before, all while consuming less fuel.