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a3xx900
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"double" Winglets On 737?

Mon Oct 19, 2015 1:19 pm

Hi everyone,
I just stumbled across a picture of a WestJet 737 with a "double" winglet (over in the General forum).

View Large View Medium
Click here for bigger photo!

Photo © Galen Burrows



I had never seen these winglets on 737 before - can anyone let me know since when they are in use, what airlines use them, etc?
Why is 10 afraid of 7? Because 7 8 9.
 
AIRWALK
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RE: "double" Winglets On 737?

Mon Oct 19, 2015 1:22 pm

They are Split Scimitar Winglets, came around some time in 2014.
I'm sure this thread will take off soon
 
georgiaame
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RE: "double" Winglets On 737?

Mon Oct 19, 2015 2:02 pm

Standard issue on the next gen 737s The MAXs. Quite a few are popping up on already "wingletted" 737s currently in service. I'm surprised you weren't aware of them, as a reader of this website. They are really very pretty to look at - something very 21st Century.
"Trust, but verify!" An old Russian proverb, quoted often by a modern American hero
 
a3xx900
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RE: "double" Winglets On 737?

Mon Oct 19, 2015 2:49 pm

Quoting georgiaame (Reply 2):
I'm surprised you weren't aware of them, as a reader of this website.

I can't believe it either  

I usually don't click on 737 pictures tbh and just look at "spectacular" pictures... And the bottom winglets are hard to spot if you don't know what you're looking for.
All pity excuses, I know...  
Why is 10 afraid of 7? Because 7 8 9.
 
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ptrjong
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RE: "double" Winglets On 737?

Mon Oct 19, 2015 10:39 pm

Quoting georgiaame (Reply 2):

Very 14th centry.
https://en.wikipedia.org/wiki/Halberd

[Edited 2015-10-19 15:40:06]
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CALTECH
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RE: "double" Winglets On 737?

Mon Oct 19, 2015 11:12 pm

Quoting ptrjong (Reply 4):
Very 14th centry.
https://en.wikipedia.org/wiki/Halberd

Very 9th century.   

http://en.wikipedia.org/wiki/Scimitar
You are here.
 
L-188
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RE: "double" Winglets On 737?

Tue Oct 20, 2015 4:00 am

Alaska has a few birds with that winglet too.
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green12324
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RE: "double" Winglets On 737?

Tue Oct 20, 2015 9:49 am

United has a lot of 737s equipped with these.
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ZaphodHarkonnen
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RE: "double" Winglets On 737?

Wed Oct 21, 2015 10:17 am

I believe these are different to the winglets that will appear on the MAX. These are an aftermarket option offered by an independent company. The MAX ones are also called something else as the name scimitar is a trademark.

http://www.aviationpartnersboeing.com/products_737_800SSW.php

compared to

http://www.boeing.com/commercial/737...hts/max-efficiency/max-at-winglet/
 
777X
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RE: "double" Winglets On 737?

Wed Oct 21, 2015 2:42 pm

Split Scimitar Winglet is made by APB.
Advanced Technology Winglet (ATW) is the Boeing version that will be on the MAX.
 
LH707330
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RE: "double" Winglets On 737?

Wed Oct 21, 2015 5:51 pm

They saw the tortilla chips on the A320 and wanted to copy them 
Quoting georgiaame (Reply 2):
Standard issue on the next gen 737s The MAXs. Quite a few are popping up on already "wingletted" 737s currently in service. I'm surprised you weren't aware of them, as a reader of this website. They are really very pretty to look at - something very 21st Century.

Not quite, the scimitars are an aftermarket refresh where they take the NG winglets, add the new tips and underfin, and reinstall it.
 
dynamicsguy
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RE: "double" Winglets On 737?

Thu Oct 22, 2015 9:56 am

Quoting ZaphodHarkonnen (Reply 8):
The MAX ones are also called something else as the name scimitar is a trademark.

"Scimitar" refers to the shape of the tip. The MAX wingtips don't have this shape so there is no reason why they would be called scimitar.
 
ZaphodHarkonnen
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RE: "double" Winglets On 737?

Thu Oct 22, 2015 10:11 am

Quoting dynamicsguy (Reply 11):
"Scimitar" refers to the shape of the tip. The MAX wingtips don't have this shape so there is no reason why they would be called scimitar.

Scimitar in this case is also a trademark so no one else who's making winglets can use it. http://tmsearch.uspto.gov/bin/showfield?f=doc&state=4808:z4742r.2.4
 
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DocLightning
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RE: "double" Winglets On 737?

Thu Oct 22, 2015 4:56 pm

Quoting ZaphodHarkonnen (Reply 8):

I believe these are different to the winglets that will appear on the MAX. These are an aftermarket option offered by an independent company. The MAX ones are also called something else as the name scimitar is a trademark.

1) The winglets are called Split Scimitars (by Aviation Partners Boeing) as installed on the 73G family. The 73M family will have a Boeing product called the Advanced Technology Winglet (ATW) as standard equipment. Not sure if Boeing plans to certify a nonwingletted version.

2) The upper wing-like element of both winglets operates, of course, as a standard winglet and reduces span-wise flow and moves vorticity due to induced drag aftward on the wing. The downward wing-like element does not extend outboard of the upward wing-like element while the aircraft is on the ground, but as the aircraft rotates to take flight, the wing flexes upward and that rotates the wingtip inward. This inward rotation of the wingtip causes the lower wing-like element to extend further outward, providing an increase in overall span.
-Doc Lightning-

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HAWK21M
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RE: "double" Winglets On 737?

Sat Oct 24, 2015 9:24 am

For more Information in simple language on the type winglet.

http://www.b737.org.uk/winglets.htm#splitscimitar
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