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Boeing Dreamlifter

Posted: Mon Apr 23, 2007 10:05 am
by paomien
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?

RE: Boeing Dreamlifter

Posted: Mon Apr 23, 2007 11:00 am
by kaddyuk
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...

RE: Boeing Dreamlifter

Posted: Tue Apr 24, 2007 7:46 am
by EI321
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.

RE: Boeing Dreamlifter

Posted: Tue Apr 24, 2007 8:15 am
by KELPkid
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...

RE: Boeing Dreamlifter

Posted: Tue Apr 24, 2007 8:21 am
by zanl188
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.

RE: Boeing Dreamlifter

Posted: Sun Dec 02, 2007 7:45 pm
by 747Dreamlifter
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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