Sponsor Message:
Civil Aviation Forum
My Starred Topics | Profile | New Topic | Forum Index | Help | Search 
Unducted Fans  
User currently offlineEconoBoy From United Kingdom, joined Mar 2004, 157 posts, RR: 0
Posted (10 years 8 months 2 weeks 3 days 1 hour ago) and read 1898 times:

When I went to the Farnborough air show in 1988, P&W or GE (I forget which) was demonstrating a radical new engine mounted on an MD-80 in place of one the usual engines. The engine was radical because it featured an unducted, contra-rotating fan that had six or eight blades per section. The fan was mounted at the rear of the nacelle. This, apparently, was the next leap forward in engine technology, and I believe that most of the major engine manufacturers came up with similar concepts. So, what I am curious to know is whether the unducted fan concept has been dropped, and if so why. Were there too many technical barriers for example? Are they too noisy?

4 replies: All unread, jump to last
 
User currently offlineNdebele From Germany, joined Apr 2001, 2901 posts, RR: 22
Reply 1, posted (10 years 8 months 2 weeks 3 days 1 hour ago) and read 1865 times:

Here are some photos of the unducted fan on the MD-80:

View Large View Medium
Click here for bigger photo!

Photo © Frank C. Duarte Jr.
View Large View Medium
Click here for bigger photo!

Photo © Bill Blanchard



View Large View Medium
Click here for bigger photo!

Photo © Paul Dopson
View Large View Medium
Click here for bigger photo!

Photo © AirNikon


Boeing had teh unducted fan tested on the 727:

View Large View Medium
Click here for bigger photo!

Photo © AirNikon



I remember a project called Boeing 7J7, I'm not sure but I think I remember that this project had also something to do with an unducted fan and was based on the 727 as well.


User currently offlineMika From Sweden, joined Jul 2000, 2881 posts, RR: 4
Reply 2, posted (10 years 8 months 2 weeks 3 days 1 hour ago) and read 1859 times:

Wow that looks lika a MD80 Turboprop!  Wow!

User currently offlineStarlionblue From Greenland, joined Feb 2004, 17118 posts, RR: 66
Reply 3, posted (10 years 8 months 2 weeks 3 days ago) and read 1816 times:

It was indeed dropped, but I can't recall why.


"There are no stupid questions, but there are a lot of inquisitive idiots."
User currently offlineEconoBoy From United Kingdom, joined Mar 2004, 157 posts, RR: 0
Reply 4, posted (10 years 8 months 2 weeks 3 days ago) and read 1791 times:

Hey Ndebele, nice shots! I didn't have the foresight to take any pictures myself when I was at Farnborough.

Top Of Page
Forum Index

This topic is archived and can not be replied to any more.

Printer friendly format

Similar topics:More similar topics...
Unducted Fans posted Tue Mar 16 2004 10:48:02 by EconoBoy
MD Unducted Fans? posted Mon Dec 25 2000 07:29:31 by AATripleseven
Jetblue Fans posted Thu Jan 3 2008 19:14:21 by Werdywerd
Fiorentina Fans At GRQ. What Is This Plane? posted Thu Sep 20 2007 15:55:24 by KL911
Espanyol Fans Protest As Flights Don't Show Up posted Wed May 16 2007 23:57:32 by PAHS200
ABE Area Spotters And Aviation Fans! posted Wed Mar 21 2007 04:52:03 by ANITIX87
FlightAware.com Is Suddenly Popular With Tide Fans posted Fri Jan 5 2007 02:15:39 by FLALEFTY
Delta To Fly Nonstops For Ohio State-Florida Fans posted Fri Dec 8 2006 16:15:22 by KarlB737
Great News For Oregon Airshow Fans! posted Fri Nov 17 2006 15:48:46 by KPDX
Saudi Gaca To Implement Fans posted Wed Sep 20 2006 04:16:24 by HiJazzey