On Nov 18, 9:07 am, Bertie the Bunyip wrote:
Stefan wrote in news:156cb$4740457b$54487377
:

I've just stumbled over this picture. Does anybody know what kind of
engine this is?
http://www.airliners.net/open.file?id=0537804&size=M

Yeah, it's the GE unducted fan from the late eighties. The idea was to make
an engine that was more fuel effecient and quiter. AFAIK it was neither.
The props were slightly supersonic and very noisy. A friend of mine saw it
at an airshow around then adn thought it sounded like a Mustang. I think
there was a 727 with a single installation as well, but I can't remember.
It died a death, anyway..

Bertie

Believe it or not, Snecma is looking at the open rotor design again to
counter Pratt's geared fan (which had its first run last week) to
power the next gen narrowbodies.