TinkerBelle
Topic Author
Posts: 1436
Joined: Tue Sep 27, 2005 7:46 am

What's Up With This Engine?

Sun Oct 30, 2005 7:12 am

http://www.airliners.net/open.file?i...%20OL%20cubgb_vq%20QRFP&photo_nr=2

I'm either a little young or I became an aviation enthusiast quite late but this picture kinda puzzles me. Did older engines on MD-80's really look like that? What's with the numbers on the blades? Just never seen anything like this before and I KNOW someone here will explain to me what's with that. Thank you.

Regards,

Michael
If you are going through hell, keep going.
 
dogfighter2111
Posts: 1867
Joined: Tue Nov 09, 2004 3:02 am

RE: What's Up With This Engine?

Sun Oct 30, 2005 7:15 am

That was a test engine on 1 aircraft. There is already a topic about it somewhere.

Thanks
Mike
 
Dougloid
Posts: 7248
Joined: Tue Jul 05, 2005 2:44 am

RE: What's Up With This Engine?

Sun Oct 30, 2005 7:16 am

That's the propfan testbed MD80....and that is the propfan or UDF unducted fan as it were. It was awful noisy and prone to high frequency vibration that caused structural problems. It never went into production....I saw it hauling in and out of Long Beach many times.
If you believe in coincidence, you haven't looked close enough-Joe Leaphorn
 
flyf15
Posts: 6633
Joined: Tue May 18, 1999 11:10 am

RE: What's Up With This Engine?

Sun Oct 30, 2005 7:17 am

This was a test aircraft quite a while. It is called an unducted fan. Kind of a hybrid turboprop/turbojet. It supposely gives better fuel consumption but there were issues with noise and vibrations.

This is the only MD-80 out there that had that engine, and in fact, it only had one of them. The engine on the other side is a normal engine. There was also a 727 out there with a UDF engine.
 
TinkerBelle
Topic Author
Posts: 1436
Joined: Tue Sep 27, 2005 7:46 am

RE: What's Up With This Engine?

Sun Oct 30, 2005 7:22 am

Thanx guys... I figured if it was out there somewhere on many planes, I probably would have seen it. I appreciate the feedback. Weird though that they only had the engine on one side.
If you are going through hell, keep going.
 
ACAfan
Posts: 690
Joined: Fri Apr 30, 2004 11:25 pm

RE: What's Up With This Engine?

Sun Oct 30, 2005 10:27 am

What is a propfan and how did it work? Any way to make a new propfan that is quieter and more fuel efficient?
Freddie Laker ... May be at peace with his maker ... But he is a persona non grata ... with IATA
 
fanofjets
Posts: 1977
Joined: Thu Apr 13, 2000 2:26 am

RE: What's Up With This Engine?

Sun Oct 30, 2005 10:40 am

NASA also conducted tests of this weird engine on a modified Grumman Gulfstream:

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Photo © Frank J. Mirande



Sadly, both the 727 and the MD-80 have been scrapped.
The aeroplane has unveiled for us the true face of the earth. -Antoine de Saint-Exupery
 
dogfighter2111
Posts: 1867
Joined: Tue Nov 09, 2004 3:02 am

RE: What's Up With This Engine?

Sun Oct 30, 2005 9:27 pm

Hey,

Give you some more info about the MD-80 UHB engines.

The engine was called a GE36 UHB. The engine was proven to be much quiter than the JT8D standard engines on the MD-80. This version was not offered to any airlines therefore were not mass produced.

Thanks
Mike
 
Dougloid
Posts: 7248
Joined: Tue Jul 05, 2005 2:44 am

RE: What's Up With This Engine?

Mon Oct 31, 2005 1:09 am

Garrett had a Falcon 20 test bed that had an ATF3 on one side and a TFE731-5 on the other side...mucho strange.
If you believe in coincidence, you haven't looked close enough-Joe Leaphorn