rwdriver
Posts: 20
Joined: Sun Jan 02, 2005 1:31 pm

DC9-31/32 Differences

Tue Oct 30, 2007 10:09 pm

Can anyone specify the practical differences between the DC9-31 and the DC9-32 for me? Thanks in advance!
 
OceansWorld
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Joined: Mon Mar 12, 2007 8:00 am

RE: DC9-31/32 Differences

Tue Oct 30, 2007 10:45 pm

DC-9-31 - powered by two 14,000lb JT8D-1 or JT8D-7 turbofans - MGTOW 98,000lb.

DC-9-32 - powered by two 14,000lb JT8D-7 or 14,500lb JT8D-9 or 15,000lb JT8D-11 or 15,500lb JT8D-15 - MGTOW 108,000lb.

DC-9-32CF - same MGTOW as -32 and powered by either JT8D-9 or -11.

DC-9-32AF - must have same specs as -32CF.

Regards
 
FlagshipAZ
Posts: 3192
Joined: Sun Jan 28, 2001 12:40 am

RE: DC9-31/32 Differences

Wed Oct 31, 2007 1:04 am

To add some production numbers here...
DC-9-31...232 built.
DC-9-32...356 built.

And I might as well add the rest of the -30 series here.
DC-9-33...20 built.
DC-9-34...12 bulit.

Regards.
"Beer is living proof that God loves us and wants us to be happy." --Ben Franklin
 
Viscount724
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RE: DC9-31/32 Differences

Wed Oct 31, 2007 1:15 am

Quoting OceansWorld (Reply 1):
DC-9-31 - powered by two 14,000lb JT8D-1 or JT8D-7 turbofans - MGTOW 98,000lb.

I may be wrong, but I didn't think any -30 series DC-9s used the JT8D-1. My sources show the JT8D-7 as the lowest-powered JT8D version on any -30 models.
 
474218
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Joined: Mon Oct 10, 2005 12:27 pm

RE: DC9-31/32 Differences

Wed Oct 31, 2007 1:39 am

Suggest reading Type Certification Data Sheet A6WE where the differences are spelled out. There are far to many differences and overlapping requirements between the two series to listed in a simple a.net post.
 
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Starlionblue
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RE: DC9-31/32 Differences

Wed Oct 31, 2007 7:30 am

Nice info OceansWorld. Thanks!

I hope you don't mind that I copied your information (and credited you) for my aviation page: http://aviation.rosboch.net. More specifically http://www.rosboch.net/aviation.htm#McDonnellDouglasVersionCodes
"There are no stupid questions, but there are a lot of inquisitive idiots." - John Ringo
 
OceansWorld
Posts: 828
Joined: Mon Mar 12, 2007 8:00 am

RE: DC9-31/32 Differences

Wed Oct 31, 2007 9:00 am

Quoting Viscount724 (Reply 3):
I may be wrong, but I didn't think any -30 series DC-9s used the JT8D-1. My sources show the JT8D-7 as the lowest-powered JT8D version on any -30 models.

You may not be wrong, as in another and more detailed source that's what is shown. The DC-9-30 was in fact launched initialy with the JT8D-1 but was later replaced by the JT8D-7.

So to recap and correct what I said in my earlier post:

DC-9-31 - originally JT8D-1-powered (14,000lb) and MTOW 98,000lb; later JT8D-7 (14,000lb), -9 (14,500lb) or -17 (16,000lb) and MTOW 108,000lb.

DC-9-32 - originally JT8D-7-powered and MTOW 108,000lb; later JT8D-9, -15 (15,500lb) or -17 and MTOW 110,000lb.

DC-9-33 - originally JT8D-9-powered and MTOW 114,000lb; later JT8D-11 (15,000lb) engines.

DC-9-34 - originally JT8D-9-powered and MTOW 121,000lb; later JT8D-15 or -17.

Quoting Starlionblue (Reply 5):
Nice info OceansWorld. Thanks!

I hope you don't mind that I copied your information (and credited you) for my aviation page: http://aviation.rosboch.net. More specifically http://www.rosboch.net/aviation.htm#...Codes

I don't mind because these are not mine. What I've written just above is from : McDonnell Douglas DC-9 by Terry Waddington (published 1998) and in my previous post the details are from the book: McDonnell Douglas DC-9, MD-80 and MD-90 written by Günter Endres and published in 1991.

Quoting FlagshipAZ (Reply 2):

Thanks for that. The DC-9-30s was the most successful version of the first DC-9 generation with 621 aircraft built out of 976.
 
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Starlionblue
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RE: DC9-31/32 Differences

Wed Oct 31, 2007 2:22 pm

Quoting OceansWorld (Reply 6):
I don't mind because these are not mine. What I've written just above is from : McDonnell Douglas DC-9 by Terry Waddington (published 1998) and in my previous post the details are from the book: McDonnell Douglas DC-9, MD-80 and MD-90 written by Günter Endres and published in 1991.

That's cool, you still get the thanks since you found the info.  Wink
"There are no stupid questions, but there are a lot of inquisitive idiots." - John Ringo
 
rwdriver
Posts: 20
Joined: Sun Jan 02, 2005 1:31 pm

RE: DC9-31/32 Differences

Wed Oct 31, 2007 3:20 pm

Thanks to all... great info!

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