Talk:Wingtip device/Archive 1

Archive 1

Archive 2

Dr. Sighard Hoerner

ADinkelacker 16:58, 17 July 2007 (UTC) Dr. Sighard Hoerner is also a pioneer in this field. He published in 1952. [1] and [2]

747 assignment

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 should try Boeing_747#Technical_data for starters. -- Solipsist 09:55, 29 September 2005 (UTC)

Wingtip devices (move)

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 think raked wingtip should be merged in here and the result be moved to Wingtip device. Formal CFV. —Joseph/N328KF (Talk) 18:39, 12 December 2006 (UTC)

Winglets are not only at an upwards angle

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?

No, this will be called a wing fence, and can be found on the A320 series (A318-A321) and MD-11.

DeepSpace 08:36, 31 May 2006 (UTC)

As is now noted in the article, a wingtip fence (which is what you were referring on the A320) is not the same as a wing fence. The MD-11 uses a conventional winglet. —Joseph/N328KF (Talk) 15:56, 3 January 2007 (UTC)

Accident

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.

To be honest I don't think it would be appropriate to link from here to Gol Transportes Aéreos Flight 1907. Whilst it looks like one of the planes lost its winglet in the collision (the pictures are interesting), this disaster doesn't appear to have anything to do with winglets directly. Its really just looks like a mid air collision in which the winglet of one was lost because, but perhaps only because it was on an extremity. If it could be shown that the Boeing plane crashed because the Embraer's wingtip cut through vital systems and this wouldn't have happened if planes didn't have winglets, then there would be a close link - but that seems unlikely. In the meantime a link from mid air collision might be relevant - ah but its already there. -- Solipsist 04:12, 7 October 2006 (UTC)

The winglets decided the collision - the Legacy winglet tore into the 737 wing and the 737 winglet hit the Legacy horizontal stabilizer. The 737 crashed and the Legacy landed. WhisperToMe (talk) 00:34, 27 February 2008 (UTC)

Awkward wording

Just noting that it might be best to re-word the second paragraph, as it is sort of awkward in its current form.

Move/example photos

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)

Try the NASA winglet article. Just saw it there the other day. ericg ✈ 10:14, 3 January 2007 (UTC)

Merger of Wingtip Device and Wingtip articles

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)

This is a falsehood. While wingtip devices are not common on older aircraft, several manufacturers now supply devices on the majority, if not all of their product line. This includes Airbus, Embraer, Bombardier, Boeing, Gulfstream, etc. —Joseph/N328KF (Talk) 11:30, 16 July 2007 (UTC)

A320 blended winglet testing

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)

Image placement

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)

History: connection to bird flight?

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)

Fair use rationale for Image:MMA.jpg

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)

Laminar airflow?

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)

Image:Wing planform and winglets.svg

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)

I strongly agree so I've commented it out for the moment - Adrian Pingstone (talk) 16:24, 9 August 2008 (UTC)

Not solely on fixed-wing aircraft

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)

Those wouldn't be, strictly speaking, "winglets" or even "wing tip devices" but rather rotor or prop devices. I think that belongs in a different article along with P-tip propellers and helicopter rotor blade tip devices. - Ahunt (talk) 00:14, 7 April 2009 (UTC)

I suppose that it depends on the definition of "wing". Helicopter rotor blades are also known as rotary wings. Modern wind-turbine rotor-blades also sport such wingtip devices. The fact that they are passive rather than active (the only major difference) shouldn't preclude their mention here. I'll try to find (or take) a photo of one for use here. --TraceyR (talk) 08:16, 7 April 2009 (UTC)

My preference would be for a new article on prop and rotor tip devices rather than tack it on this article. Aerodynamically, while they have some common elements, they are quite different subjects. - Ahunt (talk) 12:50, 7 April 2009 (UTC)

Wright brothers "blinkers"

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)

Images

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)

It looks fine to me when viewed with Google Chrome 17.0.963.83 and Firefox 11.0, with no images near the refs section at any widths up to 1440 px. Can you describe What are you seeing and also which browser are you using? - Ahunt (talk) 11:28, 24 March 2012 (UTC)

File:Gulfstream V NASA.jpg Nominated for Deletion

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 What should I do? 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. If the image is non-free then you may need to upload it to Wikipedia (Commons does not allow fair use) If the image isn't freely licensed and there is no fair use rationale then it cannot be uploaded or used. 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)

Missing citation

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)

The ref should really be added. What was it? - Ahunt (talk) 00:59, 14 August 2014 (UTC)

Possible copyright issue

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)

Which chunks? And have you checked the WP article history to see when they were added, and by whom? - BilCat (talk) 20:53, 3 April 2015 (UTC)

The citation I added was in Wingtip_device#Winglet para 2. The text was added around January 2007, but I haven't found the exact diff yet. Burninthruthesky (talk) 21:05, 3 April 2015 (UTC)

You don't need to find the diff, you can just remove the copyright vios, or re-write them if you like. - Ahunt (talk) 21:25, 3 April 2015 (UTC)

Since the journal is dated 2014, I'm unsure which may be the original. Is it possible the Literature Review of that paper sourced Wikipedia? Burninthruthesky (talk) 21:39, 3 April 2015 (UTC)

It's quite possible the paper sourced WP, or perhaps both WP and the paper. Copied the same sources. One way to help determine that is through a painstakingly long process of comparing the origin addition to WP in 2007 with the paper, and noting the differences, and then checking a diff from 2014 to see if it more closely resembles the paper than the original addition. Sometimes it's possible to see paragraphs and words added to WP that eventually made up the text in the later copy (the paper in this case). But if it is a near-verbatim copy in 2007, and the WP versions changed later, that might indicate a common source. It's sort of the WP version of the Synoptic Problem! - BilCat (talk) 22:05, 3 April 2015 (UTC)

Further inspection of the history of that paragraph shows several revisions to the wording, by various users, before 2007. This leads me to the (slightly shocking) conclusion the reference is WP:CIRCULAR rather than the article WP:COPYVIO. I will remove the citation. Burninthruthesky (talk) 07:06, 4 April 2015 (UTC)

That is a real danger with Wikipedia, we have become so well-respected that other websites are quoting us, which would be fine if they would attribute it! Good catch! - Ahunt (talk) 12:19, 4 April 2015 (UTC)