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GE Testbed N747GF  
User currently offlineBluewave 707 From United States of America, joined Jun 2001, 3152 posts, RR: 6
Posted (2 years 8 months 3 weeks 3 days 5 hours ago) and read 8285 times:

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?


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11 replies: All unread, jump to last
 
User currently offlinesweair From Sweden, joined Nov 2011, 1831 posts, RR: 0
Reply 1, posted (2 years 8 months 3 weeks 3 days 4 hours ago) and read 8229 times:

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 currently onlineStitch From United States of America, joined Jul 2005, 31248 posts, RR: 85
Reply 2, posted (2 years 8 months 3 weeks 3 days 4 hours ago) and read 8212 times:
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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.


User currently offlinesweair From Sweden, joined Nov 2011, 1831 posts, RR: 0
Reply 3, posted (2 years 8 months 3 weeks 3 days 4 hours ago) and read 8168 times:

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?


User currently onlineViscount724 From Switzerland, joined Oct 2006, 25852 posts, RR: 22
Reply 4, posted (2 years 8 months 3 weeks 3 days 3 hours ago) and read 8043 times:

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.


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User currently onlineStitch From United States of America, joined Jul 2005, 31248 posts, RR: 85
Reply 5, posted (2 years 8 months 3 weeks 3 days 3 hours ago) and read 8028 times:
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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.  


User currently offlineFX1816 From United States of America, joined Mar 2004, 1400 posts, RR: 3
Reply 6, posted (2 years 8 months 3 weeks 3 days 3 hours ago) and read 7862 times:

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


User currently offlineKELPkid From United States of America, joined Nov 2005, 6428 posts, RR: 3
Reply 7, posted (2 years 8 months 3 weeks 3 days 2 hours ago) and read 7747 times:

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 currently offlinetugger From United States of America, joined Apr 2006, 5734 posts, RR: 10
Reply 8, posted (2 years 8 months 3 weeks 3 days 2 hours ago) and read 7700 times:

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



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User currently onlineViscount724 From Switzerland, joined Oct 2006, 25852 posts, RR: 22
Reply 9, posted (2 years 8 months 3 weeks 3 days 2 hours ago) and read 7627 times:

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


User currently offlineKELPkid From United States of America, joined Nov 2005, 6428 posts, RR: 3
Reply 10, posted (2 years 8 months 3 weeks 2 days 23 hours ago) and read 7368 times:

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 :-)
User currently offlineRevo1059 From United States of America, joined Mar 2006, 137 posts, RR: 0
Reply 11, posted (2 years 8 months 3 weeks 2 days 9 hours ago) and read 6181 times:

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

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