

Mentour Pilot did a great video on these open fan engines a few months ago. They’re somewhere between a turboprop and a turbofan. They’re better than traditional turboprops in that they’re able to handle higher cruise speeds like a turbofan, and they’re more efficient than turbofans due to a higher effective bypass ratio like a turboprop.
Mentour Pilot did a video about the CFM RISE open fan engines a few months ago, they’re somewhere between a turboprop and a geared turbofan. Able to cruise at turbofan speeds, but much higher bypass ratios like turboprops. They’re not technically new, but they’re possible now due to material advances. Pretty cool concept.