4 ms·
I think I saw this exact design years and years ago in Popular Mechanics. GE's UDF reminds me of it too. https://en.wikipedia.org/wiki/General_Electric_GE36 htt
by airhead969 5y ago
I think I saw this exact design years and years ago in Popular Mechanics. GE's UDF reminds me of it too. https://en.wikipedia.org/wiki/General_Electric_GE36 https://en.wikipedia.org/wiki/General_Electric_GE36
IIRC, ducted fans are almost always more efficient than open fan designs. It's curious the Celera 500L doesn't use a ducted fan along with a propeller specifically-optimized for such a configuration. (It's an ICE, not a turboprop.)
Unpopular opinion: We need to get away from FF motors, turbines, and airborne transportation unless they can be made GHG negative.
- jlmorton 5y ago> We need to get away from FF motors, turbines, and airborne transportation unless they can be made GHG negative. We need to get away from carbon emissions, not particular sources. We need to add a price to carbon and keep increasing it until e-fuels are price competitive.
- deepnotderp 5y agoDucted fans bring with them greater skin friction drag and weight which generally more than negates efficiency gains in propulsion
- airhead969 5y agoWrong. Ducted fans can produce twice as much thrust. https://aviation.stackexchange.com/questions/27416/are-ducted-fans-more-efficient https://aviation.stackexchange.com/questions/27416/are-ducte... The main issue is controllability in cross wind gusts. Solve that problem, such as turbojet-style inlets of the 60's jets and there's real efficiency advantages to be had.