blacksoviet
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Joined: Thu Apr 21, 2016 10:50 am

Does the 737-700 burn less fuel than the 737-500?

Wed Nov 06, 2019 1:35 am

United replaced the 737-500 with used 73Gs.
 
asr0dzjq
Posts: 86
Joined: Tue Oct 29, 2019 2:36 am

Re: Does the 737-700 burn less fuel than the 737-500?

Wed Nov 06, 2019 9:28 pm

Well, seeing as the 737 NG are newer then the 737 Classics...
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N809FR
Posts: 152
Joined: Sat Aug 21, 2010 6:10 am

Re: Does the 737-700 burn less fuel than the 737-500?

Thu Nov 07, 2019 2:20 am

blacksoviet wrote:
United replaced the 737-500 with used 73Gs.


Did they though? United didn’t acquire any secondhand 73G’s until rather recently. The 735 has been gone since 2013.
 
blacksoviet
Topic Author
Posts: 1298
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Re: Does the 737-700 burn less fuel than the 737-500?

Thu Nov 07, 2019 3:45 am

N809FR wrote:
blacksoviet wrote:
United replaced the 737-500 with used 73Gs.


Did they though? United didn’t acquire any secondhand 73G’s until rather recently. The 735 has been gone since 2013.

I don't see the logic in retiring 18 year old 735s only to replace them with used aircraft of the same era.
 
N809FR
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Joined: Sat Aug 21, 2010 6:10 am

Re: Does the 737-700 burn less fuel than the 737-500?

Thu Nov 07, 2019 5:27 am

blacksoviet wrote:
N809FR wrote:
blacksoviet wrote:
United replaced the 737-500 with used 73Gs.


Did they though? United didn’t acquire any secondhand 73G’s until rather recently. The 735 has been gone since 2013.

I don't see the logic in retiring 18 year old 735s only to replace them with used aircraft of the same era.


First, the 73G is a larger frame than the 735, with a newer generation engine and an optimized wing. Second, given United’s large 737 NG fleet, it makes more sense to maintain commonality with the rest of their fleet. Sure, the youngest of the 735’s were close in age to the oldest of the 73G’s, but United isn’t bringing on 20 year old frames.
 
VSMUT
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Re: Does the 737-700 burn less fuel than the 737-500?

Thu Nov 07, 2019 8:39 am

According to the fuel consumption thread, the -500 does burn a smidge less fuel than the -700. 2400 kg/hg vs 2420:
viewtopic.php?t=1355819

IMO, thats an insignificant difference, easily made up for with better maintenance and lighter cabin configurations/seats.

But lets assume the -500 does indeed burn a slight bit less fuel:
The -700 still has savings in the form of commonality with other NG's, plus it will carry roughly 20 passengers more. It gains more range and payload, giving the airline more flexibility.
 
tommy1808
Posts: 11333
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Re: Does the 737-700 burn less fuel than the 737-500?

Thu Nov 07, 2019 9:36 am

VSMUT wrote:
According to the fuel consumption thread, the -500 does burn a smidge less fuel than the -700. 2400 kg/hg vs 2420:
viewtopic.php?t=1355819

IMO, thats an insignificant difference, easily made up for with better maintenance and lighter cabin configurations/seats..


The NG cruises faster, so per mile should burn less if the above is correct.

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Thomas
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