Questions tagged [wing]

The structures extending from the sides of the plane that generate most of the lift to keep the plane in the air.

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3answers
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Why is the trailing edge sweep angle smaller at the wing root?

Many airliners have a distinct unswept part at the wing root at the trailing edge. See for example this image from Wikimedia of a B737-400. Other examples include the B777, A320, Embrear 145, and ...
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Why are swept wings better for breaking the sound barrier?

I'm told that swept wings perform better when an aircraft is trying to break the sound barrier. I was wondering why that would be?
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Why does the F-15 have a swept-back trailing edge at its wing tips?

The F-15's wing has an curious feature: a swept-back trailing edge near the wingtips, along with an unswept inboard portion of the wing. (Modified from https://en.wikipedia.org/wiki/...
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Why does the Pilatus PC-24 have such a large “Airplane Support”?

The PC-24 has, under the fuselage, a kind of huge support to hold the wings. If we compare with the Citation CJ4 or the Phenom 300, this difference is quite significant. Why??
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What are the disadvantages of a delta wing biplane design?

The idea of a delta wing as I understand it is to reduce stress on the wing and drag on the leading edge. Now using two delta wings on separate planes, on one frame would presumably allow for a ...
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Do some light sport aircraft have clipped wings to lower their cruise speed?

Light sport aircraft may have a max airspeed in level flight at MCP of 120kts. I have heard that there are some light sport aircraft that have had their wings clipped in order to have a lower cruise ...
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What are these ribbons on the wing of an MD-83?

What are these triangles and ribbons on this MD83's wing, and what do they do?
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How would an Inverted Delta Wing planform behave, Straight part forward? Are there wings shaped this way?

There is info about straight edge wings, swept back wings, swept forward wings, delta wings. Is there also info about a Delta wing with a straight leading edge and a tapered trailing edge, the point ...
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1answer
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Why do wings of passenger jet go dark during a flight?

Why do certain areas on passenger jet wings go dark during a flight? This effect is observed on high altitude where temperature is low. When airplane descends, wings return to their initial color. ...
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What is this hole on the left wing of the Eurofighter Typhoon?

I came across the picture below and saw the hole near the centerline on the left which appears to have some carbon next to it. What is its purpose and where does the carbon come from?
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Is airflow ever laminar in the boundary layer, near the wing leading edge?

I often see images of the boundary layer over a wing indicating the airflow is laminar over the first portion of the wing: Transition from laminar to turbulent flow over the wing. Left: source, right:...
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How does the dihedral angle work?

I've been looking for this topic on the internet but I don't have enough concrete answers. Suppose we have a plane with dihedral and it has a suddenly swinging to the right (watching from the nose of ...
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Are NACA airfoils used in modern aircraft design?

I know that NACA is famous for its ducts: Gratuitous Ferrari F-40 from Wikipedia. Mmmm... pretty... It is also well known for its airfoils, and many planes in the early years of aviation used NACA ...
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Why are wings load tested upside down?

Why are wings load tested by putting weights on the underside of the wing (placed upside down)? A wing is being pulled into the air from its upper surface in flight, so shouldn't it be load tested in ...
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4answers
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What is the aerodynamic motivation behind vortex generators?

An airplane's wing creates lift efficiently when the airflow is parallel to the chord of the wing. Vortex generators twist the airstream on the wing surface. Doesn't this kind of twisted airflow ...
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1answer
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Is the entire length of a B747 or A380 wing used as a fuel tank?

It is generally understood that the fuel tanks of aircraft are in the wings, but specifically, is the entire length of the the wing of: an Airbus A380 Jumbo used as fuel tank? a Boeing 747-800 Jumbo ...
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How does wing sweep increase aircraft stability?

I was told at one point that the sweep of a wing can help with the straight line stability of the craft, in fact I think it's one of the main systems that keeps flying wings flying straight (like the ...
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How are wing tanks sealed around the internal wing structure?

I can easily grasp the idea of tanks of fuel inside the fuselage of an aircraft, and the ease of sealing such tanks in a relatively standard shape. However, I'm having a hard time understanding how ...
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Where does ice collect first on a wing in flight and why?

I've seen some reports that say ice forms on the back half of the wing and on the outside edge of the wing (the part furthest from the body) before it will form anywhere else. I'm wondering if this ...
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1answer
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Why does this Strikemaster have a textured leading edge?

I was at Duxford recently, and spotted a Jet Provost Strikemaster that had a rough texture applied to a portion of the leading edge of the wing. Why was this applied?
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Why did the XB-70 have folding wingtips?

The XB-70's wing tips folded down in flight to: improve directional stability at supersonic speeds reduce shifting of aerodynamic center at supersonic speeds reduce drag at high supersonic speeds ...
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3answers
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What are the pro/cons of polyhedral cranked wings?

Dihedral wings seems to be very common (almost if not all low-wing airliners, many modern gliders,...). Polyhedral seems to be less common and mainly found in relatively old aircraft (F4 Phatom, F4U ...
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Can anyone explain the reflex wings used in powered paragliding?

There are some paramotoring wings presumably designed for higher speeds. The method is to allow a portion of the wing near trailing edge to flutter in high speed, rendering it unaccountable for ...
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Is there any application where the crescent wing would be the best wing planform?

To my knowledge the only aircraft featuring a crescent wing that was built in numbers was the Handley Page Victor. It seems that a crescent wing offers the possibility of a high subsonic/transonic ...
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What is the mechanism by which condensation forms above wings?

The planes landing at Sydney Airport have what looks to be sheets of steam pouring off the wings. Larger planes have multiple contrails while smaller regional planes only have these sheets. This is ...
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What is a 'Wing Loop Fault' on an A320 series Aircraft?

I was recently involved in a flight that had issues before take off. The plane was an Airbus 321. It was explained to me as being a "wing loop fault". The problem was that the ECAM messages were ...
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Can a supersonic plane use a subsonic wing if the nosecone shock produces subsonic airflow around the wing?

A supersonic plane will produce shock waves off the nose cone, as seen below: These oblique shocks reduce the speed of the air that the wing experiences. If the plane is at a low enough Mach number, ...
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Why do the outer parts of wings generate less lift?

In this Wikipedia page it says: Constant chord: parallel leading & trailing edges. Simplest to make, and common where low cost is important, e.g. in the Piper J-3 Cub but inefficient as the ...
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Do high-wing aircraft represent more difficult engineering challenges than low-wing aircraft?

Generally, it's easier to make things strong in compression than in tension. In a low-wing plane, the weight of the aircraft is on top of the wing; in a high-wing aircraft, it hangs from it. It ...
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Why do we complete wing bending tests?

My question is simple.. Why do we need wing bending tests, what can we learn from them and how can this help us evolve the product?
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How does the raked wingtip of the Boeing 787 work?

The wing tips are very different on these airplanes. The wingtip on a Boeing 787 is a sharp triangle, while the wingtip on a Boeing 737-300 is flat. British Airways Boeing 787-8 G-ZBJC wingtip | by ...
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Why did the CL-400 Suntan have engines on the ends of its wings?

I've been reading more about the development of the A-12, which in turn referenced the CL-400 Suntan. I noticed that the engines are located at the end of the wing, rather than integrated with the ...
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1answer
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Airplane gently rocking its wings during whole flight

I was on a flight with a regional airline a while ago in a Bombardier airplane (if I recall correctly) where the airplane would slowly and gently rock its wings just a little bit on the whole flight. ...
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Does the downwash created by induced drag increase or decrease lift?

According to the theory I know, lift is produced by accelerating air downwards at the trailing edge (downwash). Hence, as downwash increases so does lift. Induced drag is due to vortices at the wing ...
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2answers
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What causes stall buffeting?

From other answers I've gathered that stall occurs when the air flow separates from the wing surface. And also that this starts at the back of the wing and progresses forward as AOA increases. Is ...
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3answers
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How is lift provided by a wing affected by propeller wake?

Does the lift of that section of the wing which is in the wake of the propeller increase (because the airspeed in that section is higher)? If yes, is this fact used actively to improve the lift ...
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Why should isobars be aligned with the leading edge of the main wing for a transonic cruiser?

When designing an airplane meant to cruise at transonic speeds (or supersonic speeds), I heard that one should look at the isobars on the main wing in order to assess if the shape, sweep angle and ...
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6answers
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Could clouds on aircraft wings produce lightning?

As air is accelerated over the wing, pressure drops and so does temperature, which is reduced to dew point and finally a cloud forms, which can be seen on humid days. My question is, can this cloud ...
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What is the purpose of a wing Yehudi? [duplicate]

Apart from covering the landing gear leg, the Yehudi also increases the wing root cord which allows the build height for the root to increase for the same wing relative thickness. This is useful as ...
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What advantages come with the wing on the Boeing Bird of Prey?

I noticed this picture yesterday of the Bird of Prey and wondered about the wing design and what advantages would come with this unique wing design compared to other aircraft? Source:(www.wired.com)
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How is a wing joined to the fuselage?

I've seen this video from Airbus: This is a capture from that video: What is the process for attaching the wings to the fuselage?
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How is pitch controlled in a flying wing?

How do delta wing or flying wing aircraft maintain their pitch attitude in the absence of an elevator? I understand that the ailerons on the wings do control the banking/roll, but they are ...
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1answer
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What kind of Chinook helicopter/airplane hybrid is this?

I had this question: Could this helicopter's body be a flying wing? and this picture came up. What kind of helicopter is this? What is the extra wing for?
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What are these “lines” on the A319 flaps, are they damaged?

I've noticed a grey line on the flaps of the A319: What is that? Source
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Are there any contemporary advantages in favor of wing warping?

The early Wright Flyer famously used wing warping for its roll control surfaces. This technology was soon abandoned in favor of ailerons and by the end of the biplane era, was not used anymore. I ...
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What is the aerodynamic benefit of trailing edge sweep?

I know that the sweep will allow the flight to fly at higher speed because the perpendicular air flow speed (over wing) is less. But I didn't understand why there is trailing edge sweep? We can ...
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Is a monobloc variable incidence wing viable (updated)?

Could this be a viable way to control roll on an aerobatic airplane, using some sort of tab to control a monobloc variable incidence wing? Both wings are mechanically linked together in order to only ...
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What is that black pod on the left wing of a TBM?

What is the black pod on the left wing of a TBM? (Source)
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What is the function of the leading edge strip?

I understand the function of every wing part labelled above except the leading edge strip,what is its use in a fabric wing and will the wing function normally without it,if removed?
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How do slats reduce stall speed?

I've read in PHAK that slats reduce stall speed, but in what way? Is it because of the increase in surface area?

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