[magila]

It's also not a turboprop if it's using a ducted fan. Chuck keeps using that word, I do not think it means what he thinks it means.

[mjevans]

Benefit of doubt; they're likely using it as shorthand for 'equivalent to turboprop style/class engine' as an established feature set to have a drop in alternative to.

[ChuckMcM]

lol, love this. Yeah, high bypass turbofan was what I was thinking about, and yes those are "jet" engines. Model airplanes use something called an electric ducted fan or EDF[1], and it has the nice properties in that you can run it over a wide range of speeds if desired. The recent Black Sea MQ-9 incident would, in my opinion, turned out differently if that drone used a shrouded engines for propulsion.

[1] https://www.rc-airplane-world.com/rc-jets.html