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paomien
Topic Author
Posts: 16
Joined: Wed Mar 28, 2007 12:29 pm

Boeing Dreamlifter

Mon Apr 23, 2007 10:05 am

Does anybody know why the Boeing Dreamlifter that was previous China Airlines' B-18272 (MSN 24310) had the winglets that one usually finds on a 747-4xx deleted? Is this for aerodynamic purposes?
 
kaddyuk
Posts: 3697
Joined: Thu Nov 08, 2001 1:04 am

RE: Boeing Dreamlifter

Mon Apr 23, 2007 11:00 am

Quoting Paomien (Thread starter):
Is this for aerodynamic purposes?

They had some issues with vibrations and so they were removed... It also reduces the weight of the airframe to enable it to carry more weight...
Whoever said "laughter is the best medicine" never had Gonorrhea
 
EI321
Posts: 5055
Joined: Tue Jul 07, 2009 4:43 pm

RE: Boeing Dreamlifter

Tue Apr 24, 2007 7:46 am

The requirements for winglets (and their benefits) may have changed because the aircraft obviously has more drag than a normal 747. With the reduced range, the aerodynamic benefits of winglets would be diminished and the importance of weight might take precedence.
 
KELPkid
Posts: 5247
Joined: Wed Nov 02, 2005 5:33 am

RE: Boeing Dreamlifter

Tue Apr 24, 2007 8:15 am

Quoting EI321 (Reply 2):
The requirements for winglets (and their benefits) may have changed because the aircraft obviously has more drag than a normal 747. With the reduced range, the aerodynamic benefits of winglets would be diminished and the importance of weight might take precedence.

Not to hijack this thread, but, as I understand it, the LCF's are not pressurized. Does this mean that 1) Boeing will cruise these around at the max. altitudes that the flight crew can use supplemental Oxygen at (27,000 feet?) and require that the crew be on supplemental O2 at all times, or 2) Boeing will cruise lower, like 12,500' and below, and incur a huge fuel consumption penalty?

This does have a little bit of bearing on this subject, as if Boeing is using option #2, the winglets might not help at lower altitudes...
Celebrating the birth of KELPkidJR on August 5, 2009 :-)
 
zanl188
Posts: 3769
Joined: Sat Oct 21, 2006 9:05 pm

RE: Boeing Dreamlifter

Tue Apr 24, 2007 8:21 am

Quoting KELPkid (Reply 3):
Not to hijack this thread, but, as I understand it, the LCF's are not pressurized.

The nose and cockpit areas are pressurized. Part of the modification involved adding a rather large pressure bulkhead just aft of the R1 & L1 doors.
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747Dreamlifter
Posts: 202
Joined: Mon Jul 09, 2007 10:07 pm

RE: Boeing Dreamlifter

Sun Dec 02, 2007 7:45 pm

Have Boeing received their # 3 LCF from Taiwan??

My last visit to Everett, I had a chance to see two on the ramp.

Here's a question maybe someone could share their expertise:....My understanding is that these LCF's are owned by Boeing but contracted to Evergreen International for flight duties. Why? Couldn't Boeing hire their own flight team to do the 787 parts-shuttle.? Is there some economics in contracting Evergreen.??


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