Newark727
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Posts: 1428
Joined: Tue Dec 29, 2009 6:42 pm

Difference Between 747 "sr" Variants

Wed Apr 06, 2011 12:16 am

I've been perplexed by this for quite some time. In the red corner you have the 747SR-46:

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Photo © Howard Chaloner


and in the blue corner you have the 747-146B/SR:

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Can someone explain the difference? The SR was based on the -100 and the -100B was a -100 with higher gross weight, right? Or am I just looking at some kind of database indexing issue?
 
B747FE
Posts: 217
Joined: Mon Jun 21, 2004 11:09 pm

RE: Difference Between 747 "sr" Variants

Wed Apr 06, 2011 1:13 am

Quoting Newark727 (Thread starter):
and the -100B was a -100 with higher gross weight, right?

Not exactly.

The SR was essentially a -100 modified to improve the fatigue life and the -100B was an SR series modified to increase the maximum operating weights. The -100B was based on the SR series.
Both airframes had systems optimized for quick turnarounds.

Regards,
B747FE.

Ps: I used to fly that -100B.. bring back lots of memories..
"Flying is more than a sport and more than a job; flying is pure passion and desire, which fill a lifetime"
 
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747classic
Posts: 2079
Joined: Sat Aug 15, 2009 9:13 am

RE: Difference Between 747 "sr" Variants

Wed Apr 06, 2011 7:38 am

Quoting B747FE (Reply 1):
The SR was essentially a -100 modified to improve the fatigue life and the -100B was an SR series modified to increase the maximum operating weights. The -100B was based on the SR series.



That's fully correct , for more background info, see the Type Certificate of the 747 series :
http://www.airweb.faa.gov/Regulatory...d9862576b100706f78/$FILE/A20we.pdf


At page 5,6 is the 747SR mentioned.
Produced are :

747SR-46 -----------20781-20784, 20923, 21032, 21033
747SR-81 -----------21604-21606, 21922-21925, 22291-22294, 22594, 22595, 22709-22712

747-100B at page 7, :
Produced are :

747-146B----------- 22066, 22067, 23150
747-168B----------- 22498-22502, 22747-22749
747-186B----------- 21759

Also two 747-100B(SUD) aircraft were produced for JAL ( The 747-100B SUD is basically a 747-100B series airplane with a stretched upper deck.)
747-100B(SUD) at page
Produced are :

747-146B SUD ---23390, 23637
Operating a twin over the ocean, you're always one engine failure from a total emergency.

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