An Open Fan Differs from Turboprop and How It Beats Turbofans [video](youtube.com)
youtube.com
An Open Fan Differs from Turboprop and How It Beats Turbofans [video]
https://www.youtube.com/watch?v=fT7Zi_xF8Ts
https://www.youtube.com/watch?v=fT7Zi_xF8Ts
It made some things which have confused me in the ontology of fan/prob/turbo/jet clearer, and it explained a lot about why we've wound up with fully ducted fans, powered by jet engines with a high bypass ratio.