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, 9:00 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

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.

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?

Matthew Speed wrote in
:

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?



Well, the blades go considerably slower than a turbine does!
All the same, they're pretty fast compared to a standard prop.
If a jet engine loses a fan blade it's not a good thing either. You've got
to shut down reasonably quickly. It'd be about the same for this engine, I
would think


Bertie

"Matthew Speed" wrote in message
...
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?

I was always told that the engine on a prop plane would probably get ripped
out of the mounts if a prop lost a blade so I don't think it is good on any
engine!

"Darkwing" theducksmail"AT"yahoo.com wrote in
:


"Matthew Speed" wrote in message
...
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?

I was always told that the engine on a prop plane would probably get
ripped out of the mounts if a prop lost a blade so I don't think it is
good on any engine!




It will. one of the guys in my EAA chapter lost a blade on his Tailwind.
The prop was an "experimental" McCauley clip tip prop IIRC. The mounts
broke completely, but the cowling, throttle cable and what not kept the
engine on board. He deadsticked back to the field. The Navy called up
asking f anyone owned the blade later that day. it had landed in
someones back yard just missing the lady of the house as she was hanginr
her laundry!
It's happened many times over the years, in fact. There was one in
england where the engine on a Navajo shed a blade, the engine came off,
and the engine went over the top of the fuselage and took out the second
engine. the guy succesfully deadsticked the airplane into a field..



Bertie


Bertie

One thing that would make me nervous, would be flying an engine like that,
if a blade turned loose for some reason. It would bring uncontained failure
a new meaning.
--
Jim in NC