Bluewave 707
Topic Author
Posts: 2793
Joined: Thu Jun 07, 2001 8:21 am

GE Testbed N747GF

Tue Mar 06, 2012 6:41 pm

GE's new engine testbed N747GF is headed for XMN from VCV (via HNL) ... is it going there for maintenance, paint, and cargo door conversion work?
"The best use of your life will be to so live your life, that the use of your life will outlive your life" -- D Severn
 
sweair
Posts: 1816
Joined: Sun Nov 20, 2011 9:59 am

RE: GE Testbed N747GF

Tue Mar 06, 2012 6:56 pm

Why is the 747 so popular with engines makers? RR,GE and PW all have 747s for engine tests, a question of price? Lots of old 747s..
 
User avatar
Stitch
Posts: 22953
Joined: Wed Jul 06, 2005 4:26 am

RE: GE Testbed N747GF

Tue Mar 06, 2012 7:00 pm

Quoting sweair (Reply 1):
Why is the 747 so popular with engines makers?

It has three other engines to keep it in the air and it's height off the ground allows it to fit large-diameter engines.
 
sweair
Posts: 1816
Joined: Sun Nov 20, 2011 9:59 am

RE: GE Testbed N747GF

Tue Mar 06, 2012 7:12 pm

Quoting Stitch (Reply 2):
It has three other engines to keep it in the air and it's height off the ground allows it to fit large-diameter engines.

There are absurd pictures with GE90 on a 747   I would imagine a C5 would be even better for huge engines being tested?
 
Viscount724
Posts: 18859
Joined: Thu Oct 12, 2006 7:32 pm

RE: GE Testbed N747GF

Tue Mar 06, 2012 7:51 pm

At least the new testbed has GE engines. I always found it amusing that GE's old ex-Pan Am 747-121 testbed had Pratt & Whitney engines.


View Large View Medium
Click here for bigger photo!

Photo © Marc Lehmann
View Large View Medium
Click here for bigger photo!

Photo © Kenneth Low

 
User avatar
Stitch
Posts: 22953
Joined: Wed Jul 06, 2005 4:26 am

RE: GE Testbed N747GF

Tue Mar 06, 2012 7:56 pm

Quoting sweair (Reply 3):
I would imagine a C5 would be even better for huge engines being tested?

A C5 would probably be significantly expensive to rent. Plus I am not sure if the USAF charters those birds.  
 
FX1816
Posts: 296
Joined: Thu Mar 25, 2004 8:02 am

RE: GE Testbed N747GF

Tue Mar 06, 2012 8:40 pm

Quoting Bluewave 707 (Thread starter):
GE's new engine testbed N747GF is headed for XMN from VCV (via HNL) ... is it going there for maintenance, paint, and cargo door conversion work?

I haven't talked to the guys there in about a month since I toured the facility and both 747's but I believe that is where they get the heavy checks done. It will most likely not get a cargo door conversion given that it wouldn't need one and the old one still doesn't have one. When I was there in February they did say it would still be about a year and a half before it became active. N747GE is still going to be flying for about 2 more years.

FX1816
 
KELPkid
Posts: 5247
Joined: Wed Nov 02, 2005 5:33 am

RE: GE Testbed N747GF

Tue Mar 06, 2012 9:11 pm

Quoting Stitch (Reply 5):

A C5 would probably be significantly expensive to rent. Plus I am not sure if the USAF charters those birds.

When the JT9D was in flight tests, a B-52 was used for flight testing (IIRC, the JT9D replaced the #3/#4 engine pod on the said B-52). Not sure if it was Boeing's B-52 or a USAF model...   At the time, it was the only thing with enough wing clearance to test the JT9D.
Celebrating the birth of KELPkidJR on August 5, 2009 :-)
 
User avatar
Tugger
Posts: 5973
Joined: Tue Apr 18, 2006 8:38 am

RE: GE Testbed N747GF

Tue Mar 06, 2012 9:25 pm

Quoting sweair (Reply 3):
There are absurd pictures with GE90 on a 747

It's always fun to look at:
http://www.air-and-space.com/19990824%20Kramer%20Jct/01%20747-121%20N747GE%20General%20Electric%20left%20front%20in%20flight%20l.jpg

Tugg
I don’t know that I am unafraid to be myself, but it is hard to be somebody else. -W. Shatner
 
Viscount724
Posts: 18859
Joined: Thu Oct 12, 2006 7:32 pm

RE: GE Testbed N747GF

Tue Mar 06, 2012 9:44 pm

Quoting KELPkid (Reply 7):
Quoting Stitch (Reply 5):

A C5 would probably be significantly expensive to rent. Plus I am not sure if the USAF charters those birds.

When the JT9D was in flight tests, a B-52 was used for flight testing (IIRC, the JT9D replaced the #3/#4 engine pod on the said B-52). Not sure if it was Boeing's B-52 or a USAF model... At the time, it was the only thing with enough wing clearance to test the JT9D.

Two B-52Es were apparently used as testbeds, one for the GE TF-39 program for the C-5 and another for the PW JT9D for the 747. Four photos of the TF-39 testbed in link at the top on this USAF museum site page.
http://www.nationalmuseum.af.mil/factsheets/factsheet.asp?id=2628

One of the photos. Couldn't find any photos of a B-52 with the JT9D.

http://i27.tinypic.com/20jju5c.jpg
 
KELPkid
Posts: 5247
Joined: Wed Nov 02, 2005 5:33 am

RE: GE Testbed N747GF

Tue Mar 06, 2012 11:49 pm

Quoting Viscount724 (Reply 9):
One of the photos. Couldn't find any photos of a B-52 with the JT9D.

I know, that is an incredibly elusive photo on the internet   I remembered the B-52 tests from a book I read in the third grade about the development of the 747, and the book had a picture of the B-52 in flight, with what was most obviously a JT9D engine pod under the wing   I doubt my grade school (1700 miles from where I currently live!) still has the book in their library...
Celebrating the birth of KELPkidJR on August 5, 2009 :-)
 
Revo1059
Posts: 93
Joined: Thu Mar 02, 2006 11:14 pm

RE: GE Testbed N747GF

Wed Mar 07, 2012 1:48 pm

Wonder what the performance would be like with 4 GE90s bolted up to a 747...........

Who is online

Users browsing this forum: Austin787, Baidu [Spider], CALTECH, iahcsr, justplanesmart, KrustyTheKlown, Mikey711MN, msycajun, notdownnlocked, seat1a, shamrock350, skyhigh, Tassieboy and 186 guests