Sponsor Message:
Aviation Technical / Operations Forum
My Starred Topics | Profile | New Topic | Forum Index | Help | Search 
The Purpose Of Winglets  
User currently offlineGlasgow From Australia, joined Sep 2005, 89 posts, RR: 0
Posted (8 years 10 months 2 weeks 5 days 6 hours ago) and read 18291 times:

We all know winglets look really cool, but do they actually serve a performance purpose?

Please excuse my ignorance if the answer is really simple!

9 replies: All unread, jump to last
 
User currently offlineDogfighter2111 From United Kingdom, joined Nov 2004, 1968 posts, RR: 1
Reply 1, posted (8 years 10 months 2 weeks 5 days 6 hours ago) and read 18278 times:

They increase range and makes the aircraft use less fuel don't they?

I amn't all that sure myself.

Thanks
Mike


User currently offlineGARPD From UK - Scotland, joined Aug 2005, 2622 posts, RR: 4
Reply 2, posted (8 years 10 months 2 weeks 5 days 6 hours ago) and read 18270 times:

Quoting Glasgow (Thread starter):
We all know winglets look really cool, but do they actually serve a performance purpose?

Please excuse my ignorance if the answer is really simple!

In a nutshell, the reduce wingtip drag, which improves overall aerodynamic performance which in turn relates to lower fuel burn. We're talking very small numbers, but put together on the medium or long range flight they add up quite nicely.

Check out this webpage for a more visual representation of the benefits.

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

[Edited 2005-09-11 15:27:56]


arpdesign.wordpress.com
User currently offlineGlasgow From Australia, joined Sep 2005, 89 posts, RR: 0
Reply 3, posted (8 years 10 months 2 weeks 5 days 6 hours ago) and read 18229 times:

Quoting GARPD (Reply 2):
In a nutshell, the reduce wingtip drag, which improves overall aerodynamic performance which in turn relates to lower fuel burn. We're talking very small numbers, but put together on the medium or long range flight they add up quite nicely.

Check out this webpage for a more visual representation of the benefits.

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

Thanks very much!

I was very surprised to learn that they can be up to 8 feet in height!


User currently offlineGARPD From UK - Scotland, joined Aug 2005, 2622 posts, RR: 4
Reply 4, posted (8 years 10 months 2 weeks 5 days 5 hours ago) and read 18197 times:

Quoting Glasgow (Reply 3):
Thanks very much!

I was very surprised to learn that they can be up to 8 feet in height!

As was I weh nsometime back I read up on them. They look deceptively small when you see them in a normal pic of an aircraft like so many here on a.net. But when you see a pic of a mechanic standing beside a winglet about to be installed onto a 737 or 757... wow!



arpdesign.wordpress.com
User currently offlineBBJII From United Kingdom, joined Jul 2005, 850 posts, RR: 4
Reply 5, posted (8 years 10 months 2 weeks 5 days 5 hours ago) and read 18162 times:

Winglets on our company 727 reduce fiuel burn by about 3000LBS on our Middle East Europe sectors.

Incredibly we also get M.81 as opposed to M.80...



Remember: The Bird Hit You, You Didn't Hit The Bird.....
User currently offlineGARPD From UK - Scotland, joined Aug 2005, 2622 posts, RR: 4
Reply 6, posted (8 years 10 months 2 weeks 5 days 5 hours ago) and read 18155 times:

Quoting BBJII (Reply 5):
Incredibly we also get M.81 as opposed to M.80...

I'd say that's a direct benefit of the reduced drag?



arpdesign.wordpress.com
User currently offlinePlanespotting From United States of America, joined Apr 2004, 3522 posts, RR: 5
Reply 7, posted (8 years 10 months 2 weeks 5 days 4 hours ago) and read 18145 times:

there have been a few pretty technical posts regarding winglets in the tech ops forum, you might want to do a search.

winglets reduce induced drag, resulting in a more effecient lifting device (the wing) it's quite a bit of complicated geometry, involving many lift vectors. The way it was explained to me, think of the principle of an "infinite wing". With an infinite wing, there are no wingtip vortices, or the associated induced drag effects that come along with those as the slipstream is increased over the wingtip. Winglets help create the effect of an infinite wing, although that principle is mainly theoretical in nature.

Winglets and the associated physics of are quite interesting.



Do you like movies about gladiators?
User currently offlineHAWK21M From India, joined Jan 2001, 31667 posts, RR: 56
Reply 8, posted (8 years 10 months 2 weeks 5 days 2 hours ago) and read 18113 times:

Quoting GARPD (Reply 4):
But when you see a pic of a mechanic standing beside a winglet about to be installed onto a 737 or 757... wow

There was an B737NG Blended Winglet ad with a Man standing besides it.any other Pics available.
regds
MEL



Think of the brighter side!
User currently offlineLeanOfPeak From United States of America, joined Oct 2004, 509 posts, RR: 1
Reply 9, posted (8 years 10 months 2 weeks 5 days 1 hour ago) and read 18100 times:

Winglets accept a penalty in the drag that gets worse with speed (Parasite) to produce an improvement in the drag that gets better with speed (Induced). That suggests to me that the optimum cruise speed should decrease with the addition of winglets. That there is still some efficiency improvement left when cruise Mach is increased would thus be an indication that the efficiency improvement if aircraft configuration were allowed to dictate cruise speed would be tremendous.

Top Of Page
Forum Index

Reply To This Topic The Purpose Of Winglets
Username:
No username? Sign up now!
Password: 


Forgot Password? Be reminded.
Remember me on this computer (uses cookies)
  • Tech/Ops related posts only!
  • Not Tech/Ops related? Use the other forums
  • No adverts of any kind. This includes web pages.
  • No hostile language or criticizing of others.
  • Do not post copyright protected material.
  • Use relevant and describing topics.
  • Check if your post already been discussed.
  • Check your spelling!
  • DETAILED RULES
Add Images Add SmiliesPosting Help

Please check your spelling (press "Check Spelling" above)


Similar topics:More similar topics...
What Is The Purpose Of The Flight Director On AP? posted Sat Nov 19 2005 21:31:03 by Julesmusician
Whats The Purpose Of This Light? (F100) posted Sat Sep 24 2005 00:12:24 by SkyWestFan
C17A - What Is The Purpose Of This Window? posted Tue Jul 5 2005 05:29:30 by ZKEYE
What Is The Purpose Of Iata Numbers? posted Sat Jan 1 2005 21:04:59 by DeltaWings
What Is The Purpose Of "drooping" Ailerons posted Sun Aug 17 2003 17:56:25 by Olympic A-340
The Benefits Of Winglets (pic. Question) posted Mon May 5 2003 14:19:17 by Tg 747-300
The Purpose Of Slats posted Sat Sep 14 2002 23:48:16 by N751PR
The Benefit Of Winglets posted Fri Jun 22 2001 09:26:32 by Shanti
Purpose Of The Bullet Fairing On T-tails? posted Sat Nov 5 2005 02:52:39 by VirginFlyer
Purpose Of The Turbocompressor On P&W JT3D? posted Tue Jan 23 2001 20:44:46 by Breeze

Sponsor Message:
Printer friendly format