ITT: we come up with new transportation ideas and concepts.I'll start with pic related. I call it the ducted open rotor. Improves the efficiency of the open rotor even further while reducing noise. I predict it will be the next evolutionary step after airliners are done switching to open rotors.
Have you run simulations? No? Then it's a useless fantasy
>>1346067>OP doesn’t know about turbofans
>>1346067So, a turbofan?
>>1346082>>1346085You just solved /n/
>>1346067do the props spin clockwise or counter-clockwise?
>>1346108Called "contra-rotating" props
I was reading an article about the company developing open rotor engines. They aren't certain it will get selected by any aircraft manufacturer, and if so could be 20-30 years away. I think they got some big R&D tax breaks as part of an aircraft efficiency research program, and some of the technology might be transferable to other projects.
>>1346306Did that company retrofit them on a 727 for the outside pods and the tail pod remained a JT8D?
>>1346313I think they only did ground testing, not even that much of it as the article mentions just 70 hours of testing on a static rig. There are pictures of the engine on airframes, but I think those are just graphic mockups.If it was anything more than a proof of concept I would expect hundreds to thousands of hours of test operation. The whole project is likely mothballed pending interest from an aircraft manufacturer.https://www.safran-group.com/media/what-does-future-hold-store-open-rotor-20190328I mis-remembered their speculative timeframe, it mentioned 2030s not 20 years.