Samurai 777
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Joined: Thu Jan 27, 2000 2:56 pm

Do 737NG Winglets Help Hot & High Performance?

Thu Jul 03, 2003 2:54 am

Here's a question that has me wondering if this is true: do winglets on 737NGs help at all in improving performance and saving fuel in hot and high conditions?

There's a reason for this question - for example, Qantas, Virgin Blue, Kenya Airways, Aeromexico, Southwest Airlines, SAA, and Turkish Airlines have ordered 737NGs with winglets or are planning to have them fitted with winglets. What these airlines have in common is that they are based out of countries that have brutally hot summer weather and/or high-altitude regions. Of course, hot and high conditons are a hindrance to engine performance, particularly during takeoff. Air tends to get less dense during hot weather and in high altitude regions, and that means engines have to consume more fuel for takeoff.

Winglets are normally supposed to improve a 737NG's range and even lower noise levels a bit. I have the impression that they seem to reduce the amount of power that engines require upon takeoff and in flight, which would also definitely save on fuel and probably mechanical stress, too.
 
XXXX10
Posts: 704
Joined: Mon Jan 03, 2000 7:10 am

RE: Do 737NG Winglets Help Hot & High Performance?

Thu Jul 03, 2003 2:59 am

I am no expert but I think they reduce drag to help fuel consumption,

although this probably has no effect on take off performance it probably helps in-directly by reducing the amount of fuel needed for a particular sector thus reducing the take-off weight.

please feel free to correct me if I am wrong.
 
SailorOrion
Posts: 1960
Joined: Tue Feb 06, 2001 5:56 pm

RE: Do 737NG Winglets Help Hot & High Performance?

Thu Jul 03, 2003 5:26 am

Normally winglets can improve hot & high performance a little. If only by reducing drag thus increasing L/D ratio and improving the initial climb capability.

SailorOrion
 
IndianGuy
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Joined: Fri Jul 07, 2000 3:14 pm

RE: Do 737NG Winglets Help Hot & High Performance?

Thu Jul 03, 2003 11:44 am

Why on earth does WN need winglets? I seriopusly doubt that! The average stage for their flights should not be more than 50 min to 1.2 hours. Winglets will help only on a couple of their flights.

Given that, I seriously doubt that WN would go in for winglets, unless they go in for a couple of dedicated aircraft. However that would be compromising operational flexibility.

-Roy
 
JBirdAV8r
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Joined: Sun Jun 24, 2001 4:44 am

RE: Do 737NG Winglets Help Hot & High Performance?

Thu Jul 03, 2003 12:00 pm

Roy,

WN has enough longhaul flights (and they really do have quite a few) to justify the costs.

Basically, winglets help greatly reduce wingtip vortices, so yes in a nutshell they improve aircraft performance all the way around, although I'm not sure how noticeable it will be in this situation.
I got my head checked--by a jumbo jet
 
OPNLguy
Posts: 11191
Joined: Tue Jun 15, 1999 11:29 am

RE: Do 737NG Winglets Help Hot & High Performance?

Thu Jul 03, 2003 12:01 pm

>>>Why on earth does WN need winglets?

As far as runway performance goes, every runway end at MDW is obstacle-limited, and the winglet-equipped aircraft should help. (SWA has already announced that all 737-700s will get winglets).
ALL views, opinions expressed are mine ONLY and are NOT representative of those shared by Southwest Airlines Co.
 
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STT757
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RE: Do 737NG Winglets Help Hot & High Performance?

Thu Jul 03, 2003 12:36 pm

WN has already ordered Winglets for their fleet, aircraft already delivered will be retrofitted and new aircraft will be delivered with the Winglets.
Eastern Air lines flt # 701, EWR-MCO Boeing 757
 
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STT757
Posts: 13315
Joined: Tue Mar 28, 2000 1:14 am

RE: Do 737NG Winglets Help Hot & High Performance?

Thu Jul 03, 2003 12:48 pm

Eastern Air lines flt # 701, EWR-MCO Boeing 757

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