TIL there's something called an Unducted Fan Engine : r/aviation
Cheap fuel killed propfan concepts decades ago. Can CFM's revived concept endure? | Analysis | Flight Global
Safran Open Rotor – The Next Engine Design Leap? - Mentour Pilot
Variations of Jet Engines
Jet engine - Turboprops, Propfans, Unducted Fans | Britannica
How RISE Arose: The Story Behind Decades of Innovations That Bring CFM to a Pivotal Moment - The GE Aerospace Blog | Aviation & Flight News
Pratt & Whitney-Allison Unducted Fan Engine | Download Scientific Diagram
General Electric unducted fan propulsor concept Modern technologies... | Download Scientific Diagram
Aerospaceweb.org | Ask Us - Propfan Engines
Evolutionary Trail Of The Open-Fan Engine | Aviation Week Network
Aviation My Love - KNOWLEDGE 😍 👉PROPFAN ENGINE 🥰 👉A propfan, also called an open rotor engine, unducted fan, or ultra high-bypass turbofan, is a type of aircraft engine related in concept
Propfan - Wikipedia
Jet engine - Turboprops, Propfans, Unducted Fans | Britannica
Propfan - Wikipedia
Whatever happened to propfans? | News | Flight Global
Gaining Altitude: Airbus A380 To Test CFM's Open-Fan Architecture In Flight | GE News
Propfan - Wikipedia
Prop powered Boeing 727 amazing sound on low level flypast air-to-air - YouTube
Why didn't the UDF (Unducted Fan/Propfan) catch on? - Quora
Airbus to test CFM open-fan engine on A380 testbed - Green Car Congress
Did You Know: McDonnell Douglas Considered Powering The MD-90 With Propfan Engines
Popular Mechanics - Testing a GE36 Unducted Fan (UDF) engine, or propfan, on a Boeing 727 in the 1980s. | Facebook
Propfan Power: The Story of the Unducted Fan Engine – Airways
Cheap fuel killed propfan concepts decades ago. Can CFM's revived concept endure? | Analysis | Flight Global
