Originally Posted by
Mesabah
The Boeing NMA does not have a known engine in development for it; Unless it's classified, which is highly unlikely. Even a 2030 EIS is extremely optimistic. I'm not sure Boeing will even be in commercial airplanes by then, if the government doesn't bail them out of the 737Max debacle.
IIRC, RR bailed on NMA, but they still have two vendors lined up.
NMA *should * be relatively quick and easy to be build. They are not trying out a bunch of new gee-whiz tech or production paradigms (like 787), it's more an exercise in applying existing tech (much of it new-ish but already flying on other planes) to a different size niche. Same with motors, they'll use existing cores, tweaked for the specific mission. They know it has to get to market (relatively) quickly, otherwise the niche will get filled with buses of one flavor or another.