Unusual engine

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

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

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.

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 never got to see (or hear) it, but it was featured prominently on
company calendars when I worked at McDonnell Douglas. That same
airframe, earlier in its life, stars in a piece of video floating around
the web. A hard landing in a flight test caused the entire empennage to
break off. Here's a copy of the video:

http://www.youtube.com/watch?v=WUUcxEOniz8

On Nov 18, 9:00 am, Stefan wrote:
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

G.E. Unducted Fan. Bottom line: it worked well but was too noisy. Read
about it he http://en.wikipedia.org/wiki/General_Electric_GE-36

David Johnson

G.E. Unducted Fan. Bottom line: it worked well but was too noisy. Read
about it he http://en.wikipedia.org/wiki/General_Electric_GE-36

I seem to remember reading that it was so loud, that the ground crew was
near physical nausea from the level and nature of the sound.
--
Jim in NC

"Dave" wrote

G.E. Unducted Fan. Bottom line: it worked well but was too noisy. Read
about it he http://en.wikipedia.org/wiki/General_Electric_GE-36

As far as the working well, the link you provided said it had very poor
efficiency.
--
Jim in NC

"Richard Riley" wrote

Nope. It says "Although, by virtue of its low Specific Thrust, the
engine demonstrated an extremely low specific fuel consumption"

I guess I misread that.
--
Jim in NC

On Sun, 18 Nov 2007 15:00:26 +0100, Stefan
wrote:

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


I read in AW&ST that there is re-interest in UDF technology.

Big John

On Sun, 18 Nov 2007 15:00:26 +0100, Stefan
wrote:

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

Looking at that picture it seems to me that it would much easier to
damage that engine with the blades exposed like that. Given the rate
at which turbine engines rotate wouldn't the engine be subjected to
extreme stresses if one of the blades were to be damaged?