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Do 737NG Winglets Help Hot & High Performance?  
User currently offlineSamurai 777 From Canada, joined Jan 2000, 2458 posts, RR: 4
Posted (11 years 1 month 4 weeks 1 day 3 hours ago) and read 2322 times:

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.

7 replies: All unread, jump to last
 
User currently offlineXXXX10 From United Kingdom, joined Jan 2000, 777 posts, RR: 0
Reply 1, posted (11 years 1 month 4 weeks 1 day 2 hours ago) and read 2315 times:

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.


User currently offlineSailorOrion From Germany, joined Feb 2001, 2058 posts, RR: 6
Reply 2, posted (11 years 1 month 4 weeks 1 day ago) and read 2251 times:

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


User currently offlineIndianguy From , joined Dec 1969, posts, RR:
Reply 3, posted (11 years 1 month 4 weeks 18 hours ago) and read 2191 times:

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


User currently offlineJBirdAV8r From United States of America, joined Jun 2001, 4489 posts, RR: 21
Reply 4, posted (11 years 1 month 4 weeks 17 hours ago) and read 2179 times:

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
User currently offlineOPNLguy From , joined Dec 1969, posts, RR:
Reply 5, posted (11 years 1 month 4 weeks 17 hours ago) and read 2180 times:

>>>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).


User currently offlineSTT757 From United States of America, joined Mar 2000, 16859 posts, RR: 51
Reply 6, posted (11 years 1 month 4 weeks 17 hours ago) and read 2155 times:

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
User currently offlineSTT757 From United States of America, joined Mar 2000, 16859 posts, RR: 51
Reply 7, posted (11 years 1 month 4 weeks 17 hours ago) and read 2149 times:

http://www.boeing.com/news/releases/2003/q2/nr_030617g.html




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