I just came up with an alternate aviation term. Hyperfan, referring to such gigantic bypass ratio-turbines as the NK-93 and Rolls Royce Contrafan. These so far never-were powerplants get amazing fuel efficiency-at the cost of basically everything else. Like complexity, size (that drag can’t be good), and other stuff I don’t know because I’m not an aeronautical engineer.

In real life these concepts get names like “shrouded propfans” which are very cumbersome and not very intuitive. Furthermore, there isn’t a consistent definition of them. Hyperfan is obvious and very smooth-flowing. It’s a hyper-powered fan engine to the layman, and that’s who names them.