Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [winglets]

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

0
votes
0answers
68 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 ...
0
votes
1answer
53 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?
2
votes
2answers
83 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 ...
1
vote
1answer
173 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 ...
0
votes
0answers
50 views

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....
1
vote
1answer
145 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 ...
0
votes
0answers
235 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 ...
3
votes
3answers
327 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 ...
3
votes
1answer
263 views

When are winglets most effective?

If winglets reduce induced drag, induced drag is greatest at slow speeds. When are winglets most effictive?
0
votes
2answers
243 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 ...
0
votes
0answers
259 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?
2
votes
2answers
282 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.
5
votes
2answers
214 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?
4
votes
3answers
1k views

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.
0
votes
2answers
734 views

Does F4 Phantom II pilots actually fold the wings?

Now, In X-Plane 8.15, F4 P2 can fold tip of its wings (well, Variable sweep) Is that useful ? and why would a pilot fold the wing? (Removing lift for shortfield landing ?)
3
votes
0answers
72 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 ...
1
vote
0answers
90 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 ...
6
votes
3answers
1k views

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)
3
votes
2answers
263 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 ...
4
votes
4answers
803 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 ...
8
votes
1answer
1k 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 ...
0
votes
1answer
381 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?
3
votes
3answers
421 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 ...
6
votes
1answer
230 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 ...
4
votes
3answers
2k views

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?
1
vote
1answer
192 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?
2
votes
1answer
479 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 ...
4
votes
2answers
425 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 ...
8
votes
1answer
519 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 ...
2
votes
1answer
216 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 ...
1
vote
0answers
108 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?
-3
votes
1answer
209 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 ...
4
votes
1answer
415 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 ...
2
votes
1answer
135 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?
25
votes
5answers
6k views

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 ...
9
votes
2answers
2k views

Why do winglets reduce maneuverability (of fighter jets)?

In this answer Ethan makes the following statement concerning winglets on fighter jets: [Winglets] reduce maneuverability which is why you don't see a winglet on a fighter jet I could image that ...
0
votes
1answer
6k views

Winglets vs Sharklets vs Blended wingtips [duplicate]

I tried to look for this answer but I was unable to find a complete one. What is the differences between Winglets, Sharklets (used for example on A350 XWB), and "Blended wingtips" (used only on 787)? ...
5
votes
1answer
4k views

What are some differences that make the new 737 MAX winglets more efficient than a conventional winglet? [duplicate]

I was reading this article about the Boeing 737 MAX final assembly and it was saying something about the new winglet generating lift and increasing efficiency. Can you explain to me how this works, ...
4
votes
0answers
135 views

Is the wingtip fence as effective as the winglet? [duplicate]

My guess would be no because it does not reflect the air as well.Wingtip fence Winglet What I am basically asking is does the wing tip fence have the same amount of drag reduction (wing tip vortex) ...
6
votes
4answers
2k views

Why don't airliners have rudders on the winglets?

There are a couple airplanes out there that use the winglet as the rudder, but why doesn't the winglet have a rudder on it to increase the turn of the aircraft?
11
votes
2answers
2k views

Why don't airliner winglets have consumer advertising on them?

I was looking over the wikipedia article for the 737NG when I came across this picture: As you can see, the operator of the jet has written their companies web address on the winglet. Which seems ...
0
votes
1answer
335 views

How does the airflow around winglets reduce drag? [duplicate]

I am familiar with the basic aerodynamics of wingtip vortex generation and I know that winglets reduce drag by reducing wingtip vortex generation. I have never seen any illustration of exactly how ...
10
votes
1answer
2k views

Why are there different types of winglets? [duplicate]

If all winglets serve the same purpose (to reduce vortex drag), why do different aircraft have different winglets? This question is not trying to get a comparison of the development of winglets/...
28
votes
6answers
7k views

Why do propeller blades not have winglets?

On the first look this question might sound ridiculous and maybe it is. But as propeller blades act by the same physical laws as wings, and winglets reduce the induced drag by quite a bit, then why ...
21
votes
3answers
2k views

Is wingtip design mature?

There are many wingtip design, all made to reduce vortex related drag, and neither boeing nor airbus seems to prefer one over another. They move from one design to another at each new aircraft, always ...
9
votes
1answer
1k views

Minix wingtip vortices mitigation - How does it work?

I stumbled upon this article: Minix wing tip device promises 6% gain in fuel efficiency for airliners. Such an economy is appealing and I must confess the design is "sexy". Could someone expand a ...
3
votes
1answer
1k views

What winglet airfoils are used on the Boeing B737?

I would like to know what airfoils are used for the Boeing 737 winglets.
27
votes
4answers
7k views

Why is it rare for small aircraft to have winglets?

I've noticed that winglets are very rare on small aircraft. I wonder why this is the case. Wouldn't they have the same advantages, especially because they travel at low speed? Or is it just a wrong ...
12
votes
4answers
4k views

Why don't horizontal stabilizers have winglets?

Winglets are used to reduce induced drag on the main wings of an aircraft as per explanations on wikipedia. Since they are very effective I was wondering why they are not installed also on horizontal ...
5
votes
2answers
10k views

How much fuel do the new A320-Winglets burn vs. the B737-800?

Now that the new A320-Winglets have established themselves, I'm wondering if they have better fuel consumption than the B737-800? I was told that Boeing used to be marginally better. Is that still ...