> However, the innovation that enabled this is high bypass turbofan engines. Turns out if you move more air slower, it's way quieter and more fuel efficient bec

> However, the innovation that enabled this is high bypass turbofan engines. Turns out if you move more air slower, it's way quieter and more fuel efficient because physics. Boom can't take advantage of this - at least directly, because they have to go supersonic. A high bypass turbofan engine is huge, by it's very nature. At supersonic speeds this presents a lot of drag. That's why I'm super curious how they plan to be quiet and fuel efficient while also being supersonic. I’m curious if either shielding the engines, or having a scramjet (like a turbofan but without the blades) could have a similar effect.