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Questions tagged [winglets]

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

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37 views

Could box-wing aircrafts be the plane of the future [duplicate]

I've read that box-wing aircrafts 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 aircrafts in the ...
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1answer
66 views

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 ...
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34 views

Wings and winglets [duplicate]

Wouldn't a wider wing center section be a better solution than adding winglets? Say adding 5% to the span by increasing the size of the wing box and center section. Like they did when they built that ...
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2answers
205 views

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 ...
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73 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 ...
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1answer
218 views

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 ...
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1answer
114 views

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?
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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?
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1answer
249 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.
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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 ...
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356 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?
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308 views

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 ...
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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 ...
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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 ...
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112 views

How do split winglets reduce bending moment in the wings?

I am doing a study on split winglets and how they are more advantageous than blended winglets . While browsing through the net, I was reading an article about the Boeing 787 Dreamliner and they had ...
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1answer
439 views

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?
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2answers
179 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 ...
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1answer
298 views

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 ...
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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....
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1answer
237 views

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 ...
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519 views

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 ...
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3answers
921 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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1answer
446 views

When are winglets most effective?

If winglets reduce induced drag, induced drag is greatest at slow speeds. When are winglets most effictive?
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2answers
543 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 ...
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337 views

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?
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414 views

Why the 747 testing GE-9X doesnt have a winglet?

News says it is a 747-400, but it doesn't have a winglet.
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299 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?
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3answers
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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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1k 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?
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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 ...
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110 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 ...
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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)
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2answers
304 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 ...
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5answers
1k views

Can a supersonic aircraft have winglets?

In order to have laminar flow over the wings which helps in friction drag reduction, a number of airfoil designs have been proposed from the past to the latest 737 winglets. But if we design a ...
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2answers
2k views

Why are downward pointing winglets more efficient?

While most aircraft have upward-pointing winglets Source there are also some UAVs (I couldn't find any manned aircraft$^1$) with downward pointing winglets. Source I'm pretty sure that other ...
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1answer
527 views

Why don't airbus aircraft have raked wingtips? [duplicate]

Most airbus aircraft have sharkfin winglets or blended winglets. Why is it that none of them have raked wingtips like the 777-300ER?
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3answers
556 views

How do wing tip vortices interact with the airflow on an wing with winglets?

If winglets are added to an aircraft, do the vortices still interact with the airflow and create up wash and down wash. If the vortices do interact with the rest of the flow I am wondering how they do ...
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1answer
487 views

What is the purpose of the winglets on the Socata TB-31 Omega vertical stabilizer?

Aérospatiale-Socata built a prototype of the TB-31 for the French Air Force, which never went to production: Source: netAirspace.com, photo by miamiair What is the purpose of the winglets at the top ...
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Why do some aircraft have pods on their wing tips?

By JetPix [GFDL 1.2 or GFDL 1.2], via Wikimedia Commons Why do some aircraft have pods on their wing tips, like this Cessna 414?
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1answer
221 views

Would it be a benefit to install winglets on a Hawker 400XP?

Would it be a benefit to install winglets on a Hawker 400XP? If so how much would the performance be increased?
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1answer
607 views

How can I calculate the effect of winglets on aircraft performance?

For a project at university I am having to produce a SIMULINK model of a Nimrod MR2 aircraft. The next step is to increase the endurance of aircraft and a possible route for this is adding winglets to ...
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2answers
525 views

Why does the Grumman Bat feature inverted winglets?

I've been fiddling around with trying to make a blended wing body aircraft. While modelling, I heard from someone that the design reminded them of the Swift Killer Bee (now Grumman Bat). One distinct ...
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2answers
734 views

What is the purpose of these winglets on the Chinese version of the An-2?

The Shijiazhuang (now part of AVIC) Y-5B, a Chinese version of the Antonov An-2, has winglets of a particular type: B-8447. Photo by egcc at Flickr From AVIC site: The Y5B is a modified version ...
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1answer
261 views

How are wingtips attached to the aerofoil while maintaining structural rigidity?

I've been trying to research various methods on the joints between the winglet and the wingtip out of interest. I'm aware that the airfoil is attached to the underbody of the fuselage by means of a ...
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121 views

Small aircraft performance enhancements due to winglets? [duplicate]

I'm seeing some Beechcraft Barons with winglets. Do these improve performance and, if so, by how much?
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1answer
297 views

Design winglets to counteract tip vortex [closed]

I want to know the effect of the wingtip vortex to design a winglet (or a wing horizontal extension) to counteract* this effect. How could I calculate the momentum produced by the tip vortex, in ...
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1answer
489 views

How can I get started on a winglet design for a small remote controlled aircraft?

I'm a member of a student competition team, we design light aircraft (total airplane overhead area is limited to 0.9 m²) capable of carrying higher payload. The competition also limits the takeoff ...
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1answer
163 views

Are there winglet modification regulations?

If an already existing fleet (737-800 and 900 without winglets) is thinking of a winglet modification, is that possible without regulations? Or what are the regulations?
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Is this a wing-tip device on the A-10 “Warthog”?

Source: Flickr courtesy of: U.S. Air Forces Central Public Affairs, photo by Master Sgt. William Greer Notice at the side edges, the wing peels down and back around towards the fuselage. (The ...