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ADinkelacker 16:58, 17 July 2007 (UTC) Dr. Sighard Hoerner is also a pioneer in this field. He published in 1952. [1] and [2]
i am doing an assignment at college please can i have some information on the 747-400 i.e. surface area, controls, speeds, and altitudes
I would like to suggest renaming this article to Wingtip device and include raked wingtips and wingtip fences, which are all intended to fulfill the same purpose. — Joseph/N328KF (Talk) 17:42, 2 March 2006 (UTC)
i will try to find pictures of this as i have seen several aircraft here with winglets going in a downward direction most commonly on small high wing single engine type aircraft like small cessnas would anyone like to explain what the difference is or if this still counts as a winglet?
Please someone link this article to the article of the GOL Accident in Brazil, a frontal colision betwen a 737-800 and a Embraer Legacy that the winglet of one damaged the other aircraft. —The preceding unsigned comment was added by 201.23.96.2 ( talk • contribs) 01:58, 7 October 2006.
Just noting that it might be best to re-word the second paragraph, as it is sort of awkward in its current form.
Obviously, since I have moved/merged the article, much needs to be done. I will do what I can but much needs to be fleshed out. Also, anyone know where we can find a photo of the DC-10 which was used to develop winglets? — Joseph/N328KF (Talk) 17:33, 28 December 2006 (UTC)
There has been a proposal to merge the Wingtip device article with the Wingtip article. Since wing tips are found on all fixed wing aircraft, but wing tip devices are found on very very few of them, the only way I can see of merging these articles is if the Wingtip Device article is made a sub-section of the wingtip article. Otherwise I think that they should be left as two separate articles. Ahunt 14:29, 3 January 2007 (UTC)
A few months back, Airbus determined that blended winglets on the jetBlue A320s were a failure. I can't find a press article stating this, though I know I've seen it. Anyone know where to find it? — Joseph/N328KF (Talk) 15:52, 3 January 2007 (UTC)
Please leave the image placement alone for a while. I'm working on major content additions, and will be changing the images to follow the text. We can play with the window dressing when the content is stable. Dhaluza 12:28, 5 January 2007 (UTC) On top it states "MD-11... ...the first mainline airliner to feature the winglets" near the bottom "Boeing 747-400 ...the first mainline airliner to feature the winglets I removed a comment about problems with the A380 because it was irrelevant in a discussion of the A320 and it wasn't mentioned in the article cited (October 22, 2007). —Preceding unsigned comment added by 154.20.109.155 ( talk) 04:40, 23 October 2007 (UTC)
Reading this article, I was surprised not to see any connection with bird flight, specifically the slotted wing tips found on the soaring species such as the condor and eagle. Surely they provided some inspiration. -- IanOsgood 19:36, 16 October 2007 (UTC)
Image:MMA.jpg is being used on this article. I notice the image page specifies that the image is being used under fair use but there is no explanation or rationale as to why its use in this Wikipedia article constitutes fair use. In addition to the boilerplate fair use template, you must also write out on the image description page a specific explanation or rationale for why using this image in each article is consistent with fair use. Please go to the image description page and edit it to include a fair use rationale. Using one of the templates at Wikipedia:Fair use rationale guideline is an easy way to ensure that your image is in compliance with Wikipedia policy, but remember that you must complete the template. Do not simply insert a blank template on an image page. If there is other fair use media, consider checking that you have specified the fair use rationale on the other images used on this page. Note that any fair use images lacking such an explanation can be deleted one week after being tagged, as described on criteria for speedy deletion. If you have any questions please ask them at the Media copyright questions page. Thank you. BetacommandBot ( talk) 12:54, 8 March 2008 (UTC)
My understanding is that winglets and wing fences also increase efficiency by reducing vortex interference with laminar airflow near the tips of the wing, by 'moving' the confluence of low-pressure (over wing) and high-pressure (under wing) air away from the surface of the wing. My understanding is that wingtip vortices create turbulence originating at the leading edge of the wingtip, and propagating backwards and inboard. This turbulence 'delaminates' the airflow over a small triangular section of the outboard wing, thus decreasing overall lift. The fence/winglet drives the area where the vortext forms upwards away fronm the wing surface. Is my understandign correct, or is the increased efficiency solely because of the pressure effects against the winglet itself? — Preceding unsigned comment added by 208.65.192.1 ( talk)
This newly added image has an immensely long and confused caption. This is not the purpose of captions, the text should be included in the text and properly referenced. Please see Wikipedia:MOS#Captions for more information on this. - Ahunt ( talk) 12:47, 9 August 2008 (UTC)
The article asserts that 'winglets' are used on fixed-wing aircraft but fails to mention their use on wind turbines. -- TraceyR ( talk) 22:16, 6 April 2009 (UTC)
This device was at first a single axial blinker, then two lateral ones about mid-span. These small vertical surfaces were located within the canard planes, not at the tip and not closing the area between the planes. They were installed for adding vertical surface at the front of the plane, to get a better roll/yaw coupling, i.e. spiral stability (the plane was lacking central and front lateral area). Definitively not winglets. Plxd ( talk) 15:07, 27 October 2011 (UTC)
At the end of the article there are two images intertwined with the references. I do not have the technical expertise to fix the problem. I'm sure one of you out there in Wikipedia land though. — Preceding unsigned comment added by 99.187.122.1 ( talk) 04:54, 24 March 2012 (UTC)
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There is no reference given for the following:
"There are several types of wingtip devices, and although they function in different manners, the intended effect is always to reduce the aircraft's drag by partial recovery of the tip vortex energy."
Could the author please give one?
Mcamp@cinci.rr.com ( talk) 21:27, 13 August 2014 (UTC)
Found a reference which was possibly the source. The source article made it clear that winglets reduce induced drag simply by increasing effective aspect ratio (without all of the structural penalties imposed by increasing wingspan). The original extract seemed to suggest, incorrectly, that winglets per se have some ability to "reduce vortex energy", independent of the results of simply increasing aspect ratio in a different way: vertically rather than horizontally.
Edited the text accordingly.
Mcamp@cinci.rr.com ( talk) 00:32, 14 August 2014 (UTC)
I just added a citation to [3]. Then I noticed several chunks of this article are word-for-word the same as that source. Burninthruthesky ( talk) 20:45, 3 April 2015 (UTC)
...weren´t on the Rutan in 1975, but on the Junkers W 33 D-1167 "Bremen" in 1927. Pic: http://www.flugzeuginfo.net/acimages/w33l_kp.jpg Also Somervilles biplane had sort of "blended winglets" as early as 1911. Have a nice day. 46.114.75.188 ( talk) 23:30, 18 June 2015 (UTC)
Hallo!: Same as Hartzell used the blade tip additions in aircraft propellers blades, the concept arrived to some patents in the field of marine propellers, for example: ES-0444150_A1 (1976); ES-8300608_A2 (1981); ES-0293837_U (1987). Numbers are: 'Publication number', and applicant: 'Astilleros espanoles' (Astilleros españoles). All these patents have expired, can be used, and are of open and free download in www.oepm.es (No need to enter a key for download), or in www.espacenet.com. Any OCR -Optical Character Recognition- software, free versions exist, will generate a Word or other format file, that can be translated into many languages by on-line translators, as Google translate. Enjoy the day and have some fun!. Thanks, regards, + Salut-- Caula ( talk) 17:45, 27 May 2017 (UTC)
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Aren't those Lippisch ears in the A-10 wing tips? —— Nikolas Ojala ( talk) 11:42, 26 April 2018 (UTC)
I am uninformed about stuff like this, but have actually been vaguely curious about winglets that I've seen on planes at an airport near to me, and I arrived at this article today to try to make sense of statements in obituaries today about death of aerospace pioneer Joe Clark (aeronautics) (new stub article). One obituary mentioned his role "perfecting and selling blended winglets" that reduce drag and improve performance of more than 9,000 private and commercial jets (per Seattle bizjournals obituary, March 31, 2020).
However I was derailed by the article having a long-standing nonsensical/ungrammatical statement, about a winglet being used during World War II production of He 162 planes: "This was done in order to counteract the dutch roll characteristic the marked three degrees of dihedral angle for each wing panel that the original He 162 design's wings possessed." I cannot parse that, I think it does not make sense as a sentence. The sentence became garbled in this 21 December 2016 edit by User:The PIPE, which unfortunately modified the original coverage of the issue for the He 162, added 18 June 2014 by The PIPE.
I added a link to the dihedral (aeronautics) article, moved the paragraph, and broke it into shorter sentences, and otherwise edited it in this diff just now to become the following:
The earliest-known implementation of a Hoerner-style downward-angled "wingtip device" on a jet aircraft was during World War II. This was the so-called "Lippisch-Ohren" (Lippisch-ears), allegedly attributed to the Messerschmitt Me 163's designer Alexander Lippisch, and first added to the M3 and M4 third and fourth prototypes of the Heinkel He 162A Spatz jet light fighter for evaluation. This addition was done in order to counteract the dutch roll characteristic present in the original He 162 design, related to its wings having a marked dihedral angle. This became a standard feature of the approximately 320 completed He 162A jet fighters built, with hundreds more He 162A airframes going unfinished by V-E Day. [1]
References
{{
cite book}}
: Check date values in: |date=
(
help)
Is that okay now?
There was also a "citation needed" tag added September 2016 with "reason=cited source does not support claim that these act as wingtip devices", which I don't understand. I suppose a winglet might be considered a "wingtip device", right? Then the complaint is about how the source does not support the wingtip device being a wingtip device? I know that I am uninformed in this subject area, but I removed the "citation needed" tag. Perhaps someone more knowledgeable could review this sourcing issue? The citation needed tag followed this sentence: "As production of the Third Reich's chosen turbojet-powered emergency fighter was of prime importance at the start of 1945, disruption of the production line to make other types of changes to correct such a problem were not likely to have been available, and the added wingtip devices became a standard feature of the approximately 320 completed He 162A jet fighters built, with hundreds more He 162A airframes going unfinished by V-E Day" which was attributed to the J. Richard Conway 1972 source. The sentence partially duplicated info in a previous sentence. And to me, the sentence appeared speculative, anyhow, and I am suspicious that it was speculation by the Wikipedia editor, so I removed the sentence entirely. (I may be wrong, i.e. if the source does talk about changes being "not likely to have been available", then my uninformed removal should probably be reversed.) -- Doncram ( talk) 18:21, 1 April 2020 (UTC)
The following Wikimedia Commons file used on this page or its Wikidata item has been nominated for speedy deletion:
You can see the reason for deletion at the file description page linked above. — Community Tech bot ( talk) 01:52, 23 July 2020 (UTC)
@ BilCat:, I kinda nerded out a bit there, didn't I? This page is so bad! Anything substantive kinda stands out. But this tech is so interesting. Raynatravis ( talk) 04:43, 18 March 2021 (UTC)
I quote the inaccurate sections from the first two paragraphs of the wiki-page:
"[Wingtip devices] intended effect is always to reduce an aircraft's drag by partial recovery of the tip vortex energy."
"Partial recovery of the energy" in the very least needs clarification and a source. I'd argue that is inaccurate, see McLean, Doug (2005). Wingtip Devices: What They Do and How They Do It (PDF). 2005 Boeing Performance and Flight Operations Engineering Conference.
"Such devices increase the effective aspect ratio of a wing without greatly increasing the wingspan. Extending the span would lower lift-induced drag, but would increase parasitic drag and would require boosting the strength and weight of the wing."
Wingtip devices also result in parasitic drag, it doesn't matter if the wetted area is vertical or horizontal. Wingtips also add weight and can increase the bending moment on the wing.
"...the winglet also reduces the lift-induced drag caused by wingtip vortices" - Vortices do not impact the lift-induced drag, they are a result of it. See McLean, Doug (2005). Wingtip Devices: What They Do and How They Do It (PDF). 2005 Boeing Performance and Flight Operations Engineering Conference. FropFrop ( talk) 06:09, 7 June 2023 (UTC)
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ADinkelacker 16:58, 17 July 2007 (UTC) Dr. Sighard Hoerner is also a pioneer in this field. He published in 1952. [1] and [2]
i am doing an assignment at college please can i have some information on the 747-400 i.e. surface area, controls, speeds, and altitudes
I would like to suggest renaming this article to Wingtip device and include raked wingtips and wingtip fences, which are all intended to fulfill the same purpose. — Joseph/N328KF (Talk) 17:42, 2 March 2006 (UTC)
i will try to find pictures of this as i have seen several aircraft here with winglets going in a downward direction most commonly on small high wing single engine type aircraft like small cessnas would anyone like to explain what the difference is or if this still counts as a winglet?
Please someone link this article to the article of the GOL Accident in Brazil, a frontal colision betwen a 737-800 and a Embraer Legacy that the winglet of one damaged the other aircraft. —The preceding unsigned comment was added by 201.23.96.2 ( talk • contribs) 01:58, 7 October 2006.
Just noting that it might be best to re-word the second paragraph, as it is sort of awkward in its current form.
Obviously, since I have moved/merged the article, much needs to be done. I will do what I can but much needs to be fleshed out. Also, anyone know where we can find a photo of the DC-10 which was used to develop winglets? — Joseph/N328KF (Talk) 17:33, 28 December 2006 (UTC)
There has been a proposal to merge the Wingtip device article with the Wingtip article. Since wing tips are found on all fixed wing aircraft, but wing tip devices are found on very very few of them, the only way I can see of merging these articles is if the Wingtip Device article is made a sub-section of the wingtip article. Otherwise I think that they should be left as two separate articles. Ahunt 14:29, 3 January 2007 (UTC)
A few months back, Airbus determined that blended winglets on the jetBlue A320s were a failure. I can't find a press article stating this, though I know I've seen it. Anyone know where to find it? — Joseph/N328KF (Talk) 15:52, 3 January 2007 (UTC)
Please leave the image placement alone for a while. I'm working on major content additions, and will be changing the images to follow the text. We can play with the window dressing when the content is stable. Dhaluza 12:28, 5 January 2007 (UTC) On top it states "MD-11... ...the first mainline airliner to feature the winglets" near the bottom "Boeing 747-400 ...the first mainline airliner to feature the winglets I removed a comment about problems with the A380 because it was irrelevant in a discussion of the A320 and it wasn't mentioned in the article cited (October 22, 2007). —Preceding unsigned comment added by 154.20.109.155 ( talk) 04:40, 23 October 2007 (UTC)
Reading this article, I was surprised not to see any connection with bird flight, specifically the slotted wing tips found on the soaring species such as the condor and eagle. Surely they provided some inspiration. -- IanOsgood 19:36, 16 October 2007 (UTC)
Image:MMA.jpg is being used on this article. I notice the image page specifies that the image is being used under fair use but there is no explanation or rationale as to why its use in this Wikipedia article constitutes fair use. In addition to the boilerplate fair use template, you must also write out on the image description page a specific explanation or rationale for why using this image in each article is consistent with fair use. Please go to the image description page and edit it to include a fair use rationale. Using one of the templates at Wikipedia:Fair use rationale guideline is an easy way to ensure that your image is in compliance with Wikipedia policy, but remember that you must complete the template. Do not simply insert a blank template on an image page. If there is other fair use media, consider checking that you have specified the fair use rationale on the other images used on this page. Note that any fair use images lacking such an explanation can be deleted one week after being tagged, as described on criteria for speedy deletion. If you have any questions please ask them at the Media copyright questions page. Thank you. BetacommandBot ( talk) 12:54, 8 March 2008 (UTC)
My understanding is that winglets and wing fences also increase efficiency by reducing vortex interference with laminar airflow near the tips of the wing, by 'moving' the confluence of low-pressure (over wing) and high-pressure (under wing) air away from the surface of the wing. My understanding is that wingtip vortices create turbulence originating at the leading edge of the wingtip, and propagating backwards and inboard. This turbulence 'delaminates' the airflow over a small triangular section of the outboard wing, thus decreasing overall lift. The fence/winglet drives the area where the vortext forms upwards away fronm the wing surface. Is my understandign correct, or is the increased efficiency solely because of the pressure effects against the winglet itself? — Preceding unsigned comment added by 208.65.192.1 ( talk)
This newly added image has an immensely long and confused caption. This is not the purpose of captions, the text should be included in the text and properly referenced. Please see Wikipedia:MOS#Captions for more information on this. - Ahunt ( talk) 12:47, 9 August 2008 (UTC)
The article asserts that 'winglets' are used on fixed-wing aircraft but fails to mention their use on wind turbines. -- TraceyR ( talk) 22:16, 6 April 2009 (UTC)
This device was at first a single axial blinker, then two lateral ones about mid-span. These small vertical surfaces were located within the canard planes, not at the tip and not closing the area between the planes. They were installed for adding vertical surface at the front of the plane, to get a better roll/yaw coupling, i.e. spiral stability (the plane was lacking central and front lateral area). Definitively not winglets. Plxd ( talk) 15:07, 27 October 2011 (UTC)
At the end of the article there are two images intertwined with the references. I do not have the technical expertise to fix the problem. I'm sure one of you out there in Wikipedia land though. — Preceding unsigned comment added by 99.187.122.1 ( talk) 04:54, 24 March 2012 (UTC)
![]() |
An image used in this article,
File:Gulfstream V NASA.jpg, has been nominated for deletion at
Wikimedia Commons in the following category: Deletion requests March 2012
Don't panic; a discussion will now take place over on Commons about whether to remove the file. This gives you an opportunity to contest the deletion, although please review Commons guidelines before doing so.
To take part in any discussion, or to review a more detailed deletion rationale please visit the relevant image page (File:Gulfstream V NASA.jpg) This is Bot placed notification, another user has nominated/tagged the image -- CommonsNotificationBot ( talk) 15:29, 24 March 2012 (UTC) |
There is no reference given for the following:
"There are several types of wingtip devices, and although they function in different manners, the intended effect is always to reduce the aircraft's drag by partial recovery of the tip vortex energy."
Could the author please give one?
Mcamp@cinci.rr.com ( talk) 21:27, 13 August 2014 (UTC)
Found a reference which was possibly the source. The source article made it clear that winglets reduce induced drag simply by increasing effective aspect ratio (without all of the structural penalties imposed by increasing wingspan). The original extract seemed to suggest, incorrectly, that winglets per se have some ability to "reduce vortex energy", independent of the results of simply increasing aspect ratio in a different way: vertically rather than horizontally.
Edited the text accordingly.
Mcamp@cinci.rr.com ( talk) 00:32, 14 August 2014 (UTC)
I just added a citation to [3]. Then I noticed several chunks of this article are word-for-word the same as that source. Burninthruthesky ( talk) 20:45, 3 April 2015 (UTC)
...weren´t on the Rutan in 1975, but on the Junkers W 33 D-1167 "Bremen" in 1927. Pic: http://www.flugzeuginfo.net/acimages/w33l_kp.jpg Also Somervilles biplane had sort of "blended winglets" as early as 1911. Have a nice day. 46.114.75.188 ( talk) 23:30, 18 June 2015 (UTC)
Hallo!: Same as Hartzell used the blade tip additions in aircraft propellers blades, the concept arrived to some patents in the field of marine propellers, for example: ES-0444150_A1 (1976); ES-8300608_A2 (1981); ES-0293837_U (1987). Numbers are: 'Publication number', and applicant: 'Astilleros espanoles' (Astilleros españoles). All these patents have expired, can be used, and are of open and free download in www.oepm.es (No need to enter a key for download), or in www.espacenet.com. Any OCR -Optical Character Recognition- software, free versions exist, will generate a Word or other format file, that can be translated into many languages by on-line translators, as Google translate. Enjoy the day and have some fun!. Thanks, regards, + Salut-- Caula ( talk) 17:45, 27 May 2017 (UTC)
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Aren't those Lippisch ears in the A-10 wing tips? —— Nikolas Ojala ( talk) 11:42, 26 April 2018 (UTC)
I am uninformed about stuff like this, but have actually been vaguely curious about winglets that I've seen on planes at an airport near to me, and I arrived at this article today to try to make sense of statements in obituaries today about death of aerospace pioneer Joe Clark (aeronautics) (new stub article). One obituary mentioned his role "perfecting and selling blended winglets" that reduce drag and improve performance of more than 9,000 private and commercial jets (per Seattle bizjournals obituary, March 31, 2020).
However I was derailed by the article having a long-standing nonsensical/ungrammatical statement, about a winglet being used during World War II production of He 162 planes: "This was done in order to counteract the dutch roll characteristic the marked three degrees of dihedral angle for each wing panel that the original He 162 design's wings possessed." I cannot parse that, I think it does not make sense as a sentence. The sentence became garbled in this 21 December 2016 edit by User:The PIPE, which unfortunately modified the original coverage of the issue for the He 162, added 18 June 2014 by The PIPE.
I added a link to the dihedral (aeronautics) article, moved the paragraph, and broke it into shorter sentences, and otherwise edited it in this diff just now to become the following:
The earliest-known implementation of a Hoerner-style downward-angled "wingtip device" on a jet aircraft was during World War II. This was the so-called "Lippisch-Ohren" (Lippisch-ears), allegedly attributed to the Messerschmitt Me 163's designer Alexander Lippisch, and first added to the M3 and M4 third and fourth prototypes of the Heinkel He 162A Spatz jet light fighter for evaluation. This addition was done in order to counteract the dutch roll characteristic present in the original He 162 design, related to its wings having a marked dihedral angle. This became a standard feature of the approximately 320 completed He 162A jet fighters built, with hundreds more He 162A airframes going unfinished by V-E Day. [1]
References
{{
cite book}}
: Check date values in: |date=
(
help)
Is that okay now?
There was also a "citation needed" tag added September 2016 with "reason=cited source does not support claim that these act as wingtip devices", which I don't understand. I suppose a winglet might be considered a "wingtip device", right? Then the complaint is about how the source does not support the wingtip device being a wingtip device? I know that I am uninformed in this subject area, but I removed the "citation needed" tag. Perhaps someone more knowledgeable could review this sourcing issue? The citation needed tag followed this sentence: "As production of the Third Reich's chosen turbojet-powered emergency fighter was of prime importance at the start of 1945, disruption of the production line to make other types of changes to correct such a problem were not likely to have been available, and the added wingtip devices became a standard feature of the approximately 320 completed He 162A jet fighters built, with hundreds more He 162A airframes going unfinished by V-E Day" which was attributed to the J. Richard Conway 1972 source. The sentence partially duplicated info in a previous sentence. And to me, the sentence appeared speculative, anyhow, and I am suspicious that it was speculation by the Wikipedia editor, so I removed the sentence entirely. (I may be wrong, i.e. if the source does talk about changes being "not likely to have been available", then my uninformed removal should probably be reversed.) -- Doncram ( talk) 18:21, 1 April 2020 (UTC)
The following Wikimedia Commons file used on this page or its Wikidata item has been nominated for speedy deletion:
You can see the reason for deletion at the file description page linked above. — Community Tech bot ( talk) 01:52, 23 July 2020 (UTC)
@ BilCat:, I kinda nerded out a bit there, didn't I? This page is so bad! Anything substantive kinda stands out. But this tech is so interesting. Raynatravis ( talk) 04:43, 18 March 2021 (UTC)
I quote the inaccurate sections from the first two paragraphs of the wiki-page:
"[Wingtip devices] intended effect is always to reduce an aircraft's drag by partial recovery of the tip vortex energy."
"Partial recovery of the energy" in the very least needs clarification and a source. I'd argue that is inaccurate, see McLean, Doug (2005). Wingtip Devices: What They Do and How They Do It (PDF). 2005 Boeing Performance and Flight Operations Engineering Conference.
"Such devices increase the effective aspect ratio of a wing without greatly increasing the wingspan. Extending the span would lower lift-induced drag, but would increase parasitic drag and would require boosting the strength and weight of the wing."
Wingtip devices also result in parasitic drag, it doesn't matter if the wetted area is vertical or horizontal. Wingtips also add weight and can increase the bending moment on the wing.
"...the winglet also reduces the lift-induced drag caused by wingtip vortices" - Vortices do not impact the lift-induced drag, they are a result of it. See McLean, Doug (2005). Wingtip Devices: What They Do and How They Do It (PDF). 2005 Boeing Performance and Flight Operations Engineering Conference. FropFrop ( talk) 06:09, 7 June 2023 (UTC)