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What's Up With This Engine?  
User currently offlineTinkerBelle From , joined Dec 1969, posts, RR:
Posted (8 years 10 months 4 days 9 hours ago) and read 3223 times:

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

8 replies: All unread, jump to last
 
User currently offlineDogfighter2111 From United Kingdom, joined Nov 2004, 1968 posts, RR: 1
Reply 1, posted (8 years 10 months 4 days 9 hours ago) and read 3198 times:

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

Thanks
Mike


User currently offlineDougloid From , joined Dec 1969, posts, RR:
Reply 2, posted (8 years 10 months 4 days 9 hours ago) and read 3190 times:

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.

User currently offlineFlyf15 From , joined Dec 1969, posts, RR:
Reply 3, posted (8 years 10 months 4 days 9 hours ago) and read 3186 times:

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.


User currently offlineTinkerBelle From , joined Dec 1969, posts, RR:
Reply 4, posted (8 years 10 months 4 days 9 hours ago) and read 3157 times:

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.

User currently offlineFanofjets From United States of America, joined Apr 2000, 1965 posts, RR: 3
Reply 5, posted (8 years 10 months 4 days 6 hours ago) and read 3007 times:

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

View Large View Medium
Click here for bigger photo!

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
User currently offlineACAfan From United States of America, joined Apr 2004, 710 posts, RR: 6
Reply 6, posted (8 years 10 months 4 days 6 hours ago) and read 2901 times:

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
User currently offlineDogfighter2111 From United Kingdom, joined Nov 2004, 1968 posts, RR: 1
Reply 7, posted (8 years 10 months 3 days 19 hours ago) and read 2709 times:

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


User currently offlineDougloid From , joined Dec 1969, posts, RR:
Reply 8, posted (8 years 10 months 3 days 15 hours ago) and read 2559 times:

Garrett had a Falcon 20 test bed that had an ATF3 on one side and a TFE731-5 on the other side...mucho strange.

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