Questions tagged [winglets]

Wing devices on the end of the wing for aerodynamic purposes.

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What is Effective Wingspan?

what is Effective wingspan and why it is said ground effect increase "effective wingspan" of an aircraft? Why would vortex affected by surface result in an increase of "effective ...
Alex Gallegos's user avatar
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2 answers
377 views

What are the techniques that delay the formation of shock wave over wing?

In addition to winglets and other techniques like sweeping wing back what are the other techniques that delay the formation of local shock wave over the wing?
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Spiroid Winglets Cad models details requirement

Can anyone know where I can find spiroid winglets cad models? As iam conducting an experimentation on spiroid winglets.
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2 answers
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Are winglets symmetric airfoils? (Cessna Citation M2)

I want to simulate the Cessna citation M2 in XFLR as a student homework assignment. This aircraft has a NASA high-speed 0213 airfoil (which is not symmetric) and a winglet, which can be seen in the ...
MIKE PAPADAKIS's user avatar
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If a hot air source was added to the wingtips, would it help control the formation of wingtip vortexes?

Let's say that somehow, an engineer made an exhaust pipe that constantly sprayed hot air at the wingtips in order to help control the formation of less turbulent wingtip vortexes. Would that have any ...
Fulano's user avatar
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How is blended winglet better?

*Make sure to read the following as I cannot explain my question in one sentence Winglets are a kind of wingtip device that is installed on an aircraft to reduce drag and improve fuel efficiency. ...
Frank's user avatar
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Why did Pipistrel design the Sinus with core wing sections just at 40' instead of well under?

The Pipistrel Sinus has detachable wingtips and wing extensions. However, they designed the plane with a wing core span at 39'11", just barely larger than a standard "40' door" (which ...
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What is the aerodynamic impact of the curved/crescenteric wing of the Boeing 787? [duplicate]

From certain angles (see pictures below), the wing of the Boeing 787 seems almost curved/crescenteric in shape, particularly closer to the wing-tip. While the Boeing 787 makes use of "raked ...
interested22's user avatar
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Are the aerodynamic benefits of winglets similar for both powered airplanes and gliders?

Are the aerodynamic benefits of winglets similar for both powered airplanes and (unpowered) gliders? (without considering fuel consumption of course)
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Is Airbus offering to retrofit older A350s with the new winglets?

I noticed that new winglets (sharklets?) on the A350 are extended as part of the PIP (Performance Improvement Package). Are older A350s being retrofitted with the new sharklets? Does Airbus even offer ...
user928112's user avatar
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What causes air flow towards fuselage near the winglet?

I am trying to understand how winglets are beneficial in reducing induced drag and I came across this article; https://www.boldmethod.com/learn-to-fly/aerodynamics/how-winglets-work-to-reduce-drag-and-...
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Why hasn't the US military performed aftermarket modifications on certain aircraft?

The US military emits more CO2 annually than several countries. Winglets have been proven to work well in the commercial sector to reduce fuel burn, therefore reducing both CO2 emissions and fuel cost....
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How heavy are the folding wingtips of 777x?

To understand the mass penalty that is induced by a folding wingtips, as a first order approximation we can start with just the wingtip's mass without the actuating mechanism. I could not find the ...
karthikeyan's user avatar
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2 answers
273 views

Can winglets be used to compensate the high induced drag created by a low aspect ratio wing?

I have read in some articles that the major advantage of having a high aspect ratio (AR) wing is to reduce the induced drag. If winglets main job is also to reduce the induced drag, how much drag does ...
Adriel Mattheuz Estolano's user avatar
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Why aren't 757 scimitar winglets flush with the ailerons?

Over my many past flights aboard 757s, I have seen changes being implemented with their design. One of which was notably their refit of scimitar winglets. Although one of their most notable ...
Ja380's user avatar
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How did this flydubai 737NG get Max winglets?

I’ve seen this one on my way to the office in DXB. It’s clearly equipped with paired MAX winglets, however the engines are not curly. So judging by symptoms it’s not MAX. Was filming from a car, hence ...
Viktor Radchenko's user avatar
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2 answers
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Why are winglets swept back and not front?

A winglet is defined by its airfoil shape, profile, sweep angle and height. In case of the sweep angle, why does it always mean that the winglet is swept back. What is the disadvantage of having a ...
sai teja's user avatar
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What is the purpose of these "antennas" on the aileron and winglet (A320 Neo) [duplicate]

As title says, see attached picture:
xenoid's user avatar
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Could box-wing aircraft be the plane of the future [duplicate]

I've read that box-wing aircraft can reduce wingtip vortices caused by induced drag hence saving up a lot of fuel and hence able to carry more passengers. Would we able to see such aircraft in the ...
Johnson's user avatar
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1 answer
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How do individually controlled feather like winglets work?

I want to know how the individually controlled feather like winglets work on controlling and rolling by reducing drag.(concept of airbus bird's of prey) I just need a detailed review of the ...
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Do winglets really improve efficiency and reduce drag? [duplicate]

Below are some pictures of various fixed wing aircraft with winglets. It is widely accepted that these winglets will improve an airplane's performance by reducing drag and therefore improving fuel ...
AirCraft Lover's user avatar
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2 answers
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How do splayed wingtips work?

I need to know more about the "splayed wingtips" design made by Airbus in their latest conceptual design "birds of prey". How would wingtip vortices work on this plane? How are they reduced by the ...
willson smith's user avatar
1 vote
3 answers
198 views

Where can I place an engine in a twist morphing wing?

I am designing an electric aircraft with a wing that is completely based on the idea of biomimicry, whereas the wing has multiple winglets and can also morph by twisting. It is more like an experiment ...
Nameera's user avatar
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3 votes
1 answer
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What about the DC-9's wing makes wingletting it so difficult?

A common way of making older airliners more efficient without increasing their wingspan is to add winglets, either as a retrofit for existing aircraft or as a new, wingletted derivative of a ...
Vikki's user avatar
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What exactly do winglets do? [duplicate]

I know that the winglets on planes like the Boeing B737 and Embraer E-190 reduce fuel consumption, but do they do more than that, or are they just for the stated purpose?
Zach Bennett's user avatar
13 votes
2 answers
6k views

Why does the Antonov AN-225 not have any winglets?

Winglets provide a lift boost that would be useful to a plane of this size. But the An-255 does not have any winglets. Why is it so?
Vinit Chaudhari's user avatar
3 votes
1 answer
299 views

Are virtual winglets a viable concept?

Just read this abstract by a Regeneron STS finalist. Is the idea of a virtual winglet a viable concept? Seems interesting.
Tristan Semmelhack's user avatar
29 votes
6 answers
4k views

Would an 8% reduction in drag outweigh the weight addition from this custom CFD-tested winglet?

I'm writing an essay at school about why there is so much variation in winglet design. I am analysing all the primary types of winglets used today in the aviation industry. I'm constructing them in ...
Harry Karmel's user avatar
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1 answer
661 views

Why is a rectangular wing with winglets not better than an elliptical wing?

Why is a simple rectangular wing with winglets not better than an elliptical wing in terms of induced drag and produced lift?
xnor's user avatar
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1 answer
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How are elliptical winglets better than blended winglets?

I've read in few papers that elliptical winglets give better performance than blended in terms of their L/D ratio. I am not able to find why elliptical winglets are better. the two differ by their ...
sai teja's user avatar
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Why can’t more older 737s be retrofitted with more newer winglets?

Some background: there are four different types of winglet that have been used on various 737s over the years. The mini winglet is used to retrofit 737-200s (one of the two 737 Original variants, the ...
Vikki's user avatar
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15 votes
2 answers
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Why do newer 737s use two different styles of split winglets?

All new 737s use split-tip winglets, which are more efficient than the simpler blended winglets previously used. However, for no clear reason, they use two different types of split-tip winglet: New ...
Vikki's user avatar
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What are the dimensions of the A320's wingtip fences?

Does anyone know the size (relative to the wing) or have a schematic draw of these wingtip fences?
Henrique Matos's user avatar
2 votes
2 answers
827 views

How do endplates reduce induced drag?

I have heard the explanation which states that the endplates reduce the tip vortex formation thereby reducing induced drag. From what I understand induced drag is the backwards component of the total ...
Zaber's user avatar
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Why does a flight booking mention that the plane has wingtips? [closed]

Often when booking flights the plane is listed as having wingtips. For example, it would say 737 (wingtips). I get what the wingtips are for, but what is the purpose of telling the passengers that ...
Michael Stachowsky's user avatar
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Is winglet height equivalent to duct height?

Winglets increase effective wingspan by causing vorticies to be generated further away from the wing root in proportion to the height of the winglet (if vertical), likewise with winglets on propellers....
Aviator S's user avatar
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1 answer
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Why do some airplanes have their winglets at different angles?

While travelling recently a friend of mine noticed that the tips of the wings on some planes were at different angles on the left and the right hand sides of the plane. Is this a thing and what is ...
Lizzan's user avatar
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Why don't more airplanes incorporate spiroid winglets? [duplicate]

In typical airplanes, lift induced drag can account for the majority of the overall drag. Why don't more aircraft employ methods to reduce this and specifically why not spiroid winglets? From every ...
Jason's user avatar
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4 votes
2 answers
2k views

Aerodynamics of double winglets

I've read here on Aviation SE that the aerodynamics of winglets on an aircraft are easily described as "extending the airfoil". Thus, as I understand it, a winglet is like stretching the airfoil a ...
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When are winglets most effective?

If winglets reduce induced drag, induced drag is greatest at slow speeds. When are winglets most effictive?
Karabo Nkosi's user avatar
1 vote
2 answers
2k views

Winglet design and airfoil selection

I'm currently in the process of designing a winglet for my low speed aircraft in xflr. While researching about winglets I read in a Boeing article that if the baseline outboard wing is relatively ...
Zaber's user avatar
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0 answers
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Is the Embraer E190-E2 equipped with raked wingtips?

It looks like the Embraer E190-E2 has a raked wingtip, but isn't a raked wingtip only efficient for long-haul aircraft like the Boeing 77W?
Leo Chow's user avatar
6 votes
2 answers
712 views

Why doesn't the 747 that is testing the GE9X have winglets?

Why doesn't the 747 that is testing the GE9X have winglets? The news says it is a 747-400, but it doesn't have winglets.
Leo Chow's user avatar
7 votes
2 answers
529 views

If a winglet disconnected from an airplane mid-flight, what would be the consequences?

I've always knew that the winglets on an aircraft provide lift. But what would happen if a winglet disconnected from one wing while a winglet was on another wing?
Super's user avatar
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8 votes
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How is drag created from wingtip vortices?

What is the reason for the drag due to wingtip vortices? This question is about (general) performance, but doesn't answer the drag aspect.
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3 answers
3k views

Do F-4 Phantom II pilots actually fold the wings?

In flight simulator X-Plane 8.15, the F-4 Phantom 2 can fold the tip of its wings (well, variable sweep). Is that useful? Why would a pilot fold the wing? To reduce lift for short landing?
Delta Oscar Uniform's user avatar
4 votes
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108 views

What is the appropriate airfoil config for Raked Wingtips?

I'm doing a research about wingtip devices and while I'm searching about raked wingtip, I've wondered what is the best airfoil configuration for it? Should it be the same as the whole wing? My study ...
Henrique Matos's user avatar
1 vote
0 answers
123 views

What are the benefits of raked wingtips over tapered wingtips? [duplicate]

This post shows the differences between winglets and raked wingtips. I'm curious why raked wingtips have been developed when there are tapered wingtips. What are the benefits of raked wingtips over ...
lemonincider's user avatar
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6 votes
4 answers
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Why has Boeing used mini winglets on the 737-200?

I found mini winglets just in B 737-200. What's the differences between mini winglets and the blended ones which Boeing uses in more recent versions? (picture source)
meisam nemati's user avatar
3 votes
2 answers
424 views

Would winglets add fuel efficiency on a Concorde? [duplicate]

Would adding winglets to a Concorde have a had a positive impact on its performance and fuel efficiency in retrospect, considering the technology was not widespread or developed at the time these ...
securitydude5's user avatar