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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6
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3answers
1k views

What are the limitations to adding wings with engines to a helicopter?

I've probably seen this in science fiction and cartoons but never in real life. Rotor wing aircraft (helicopters) have numerous advantages over their fixed wing counterparts, and vice versa. For ...
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2answers
876 views

Is it OK to use foam for the ribs of an ultralight's wing?

I have seen several YouTube videos of ultralights and even HPAs (Human Powered Aircraft) that use foam as the ribs of their wings. Are ribs not supposed to be made of rigid, strong, woody and light ...
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1answer
371 views

How do you load test a wing rib?

When builders say they load tested a wing, most of the time what they are saying is that they load tested the wing spar(s) by turning the plane upside down and putting weights on the wing. This ...
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2answers
309 views

How to adjoin wing skin to wing ribs?

I saw a youtube video (from a channel called Real life guys) where gum was used to join the ribs of their homemade plane to the skin and I saw another video where the wing skin(tedlar) was literally ...
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1answer
504 views

why lift is greater at wing root [duplicate]

Is lift greater at the wing root of an horizontal wing,just like it's greater on a tapered wing?
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5answers
7k views

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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1answer
762 views

Why do aerobatic planes have symmetrical wings?

Besides the fact that symmetrical wings fly the same inverted as upright are there any other reasons why aerobatic planes prefer symmetrical wings? Can symmetrical wings achieve a higher critical ...
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2answers
219 views

When rearranging the lift force equation to solve for lift coefficient instead of lift force, why is the numerator often given as F not 2F?

the standard description of the Lift force affecting the lift surface is: $$ F={\dfrac{1}{2}}\rho v^{2} SC_{L} $$ the basic rearrangement gives the following definition of the lift coefficient: $$ C_{...
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1answer
721 views

What repair can be done on this wingtip? (777)

The accident happened in August 2012 and broke the wing of the Boeing 777-200 passenger jet. While taxiing at Shanghai's Pudong airport, its wingtip hit the tail of another aircraft. What action need ...
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2answers
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How to pick a good airfoil based on Cl and Cd

Let's assume I have 10 different airfoils graphs of Cl x Aoa, Cd x Aoa and Cl/Cd x Aoa. How do I pick the best one that will give me the most efficiency (the longest flight time)? I understand the ...
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4answers
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How can I find the optimum chord wing length for this wing?

This Aviation SE forum looks the perfect place to ask this question: people here usually make maths the root of most solutions and I think this may solve my aerodynamic optimization problem! I am ...
6
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2answers
517 views

What is the wingtip station number on a Boeing 747?

In the figure we can see the station line even though it is not clear. I'am using that picture just for an example to make the question clearer. Main question What is the station number for wingtip ...
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2answers
281 views

Are high-frequency flapping wings efficient and scalable at high Reynolds numbers?

Is high-frequency flapping (similar to how dragonflies fly) an efficient lift production method at high Reynolds numbers? I have not seen anyone develop wing suits with high frequency flapping, is ...
2
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1answer
2k views

What factors are included in the moment coefficient of a wing?

I am trying to make sure I correctly understand the moment coefficient. Both the lift and the drag coefficients vary with angle of attack and can be either positive, negative or zero. The moment ...
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2answers
201 views

Are aircraft wings airtight?

Is there any no air proof design for the wings? Or are some of the parts are equivalent to outside pressure and some have gauge pressures? Are some parts airtight and others not?
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1answer
3k views

What is the aerodynamic advantage to a cuffed wing like the Cirrus SR-22?

What is the aerodynamic advantage to a cuffed wing like this Cirrus?
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2answers
564 views

Does an aircraft with higher aspect ratio wings produce more wingtip vortices in a turn than one with lower aspect ratio wings?

The Ta-152H was well-known for having very high-aspect ratio wings: 8.94, if I'm not mistaken. Now, compare this to the P-51 which had, if I'm not mistaken, an aspect ratio of 5.86. Does this mean ...
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0answers
315 views

Why are Leading Edge Flaps (LEFs) create lift while down at slow speeds but decrease lift while down at higher speeds?

When taking off or landing, both LEFs and trailing edge flaps (TEFs) for fighter aircraft are in the down position to provide more lift. However, when flying around at higher speeds (let's say 500-600 ...
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3answers
377 views

If we use upper surface blowing and externally blown flap on the same wing will lift correspondingly be very high?

With two engines, one above and one below the wing, will the lift be the sum of two lift increments (produced by upper surface blowing and external blowing)? I am trying to make a jet suit and I am ...
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2answers
1k views

What are the effects of camber location in an airfoil?

Am I correct to assume that for a low speed aircraft, the location of the camber in the MAC's airfoil will correspond with the aerodynamic center? Also, does that affect the moment coefficient? And ...
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0answers
141 views

Why don't airliners use crescent wings? [duplicate]

The crescent wing design seen on the Victor bomber seems to have a great number of advantages... the critical mach remains more constant along the span, so the formation of shock waves is more even ...
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4answers
1k views

Why do wall-to-wall airfoils in wind tunnels produce no (or infinitesimal) downwash?

There are several induced drag explanations out there saying that tip/wake vortices “come from” downwash and downwash “comes from” lift. I’m using quotes because the concept is that there are no cause ...
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2answers
442 views

Are there any aircraft where the wings are swept forward of the cockpit?

Are there any aircraft where the wings are swept forward to form a C shape ahead of the cockpit? Something like this: ...
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1answer
98 views

How do we find the breaking point of an old braced wing?

I was curious about how to find the maximum g's an old plane like the Spitfire (c-wing) could endure, given all realistic factors. Since the Spitfire's wing, in particular, was quite thin and braced ...
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1answer
286 views

How are the wing control surfaces configured for takeoff?

For regular aircraft (i.e. a typical airliner), how are the wings configured before or during takeoff? Are there any adjustments needed for climb?
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0answers
128 views

How much do the V-22 Osprey's wings weigh?

I am trying to ascertain the weight of the V-22's entire wing assembly: right, left and center including both nacelles. But excluding the engines if possible.
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1answer
6k views

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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1answer
29k views

How much fuel does an A380 hold and where?

How much fuel does an A380 usually carry (in litres) and what is the maximum? How much is in each wing? How much is in other fuel tanks and where are they?
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2answers
6k views

Why do the wing tips on the Boeing 777X fold up instead of down?

The outer 11.4 feet (3.8 meters) of the wings of the Boeing 777X are designed to fold up when on the ground. Why aren't they designed to fold down? It seems to me that folding down would be more "...
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2answers
247 views

How should I build removable wings on a home build?

In the future I would like to build a home built aircraft from scratch, but I would like the aircraft to be able to be hauled by trailer. I would like the wings to be removable but don’t have a ...
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0answers
207 views

What typical improvements in lift/drag are gained using dimple & zig-zag strips? [duplicate]

A golf ball goes twice as far using a dimpled surface. Many European aircraft (especially gliders) use dimple strips or zig-zag tape on propellers, wings, struts etc. Very few US aircraft use these ...
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2answers
2k views

How can we design a wing for cruising at very low speeds?

I was thinking about a simple super-light aircraft powered with a little low-power piston engine. Is there any way that we can design a wing so the aircraft flies very slow (like 25 km/h as minimum ...
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2answers
4k views

Have any operational aircraft ever used over wing fuel tanks?

We are most familiar with under wing fuel tanks, has any operational aircraft ever used over wing fuel tanks?
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1answer
657 views

What is the length of an A380 aileron?

I work as a paint shop prepper at an airport in the UK and have currently worked on a aileron of a 757-200 that was 14ft long and wanted to compare it to that of a A380
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2answers
4k views

What are those arrow markings on the wing?

I recently flew on a Boeing 737-800 and found these arrow markings on the wing. What are they for?
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1answer
1k views

What are the advantages of the Riblett airfoil over the Original Pietenpol Airfoil?

Some builders have opted to build a Riblett airfoil based wing for the Aircamper rather than using the original Pietenpol wing. What are the basic characteristics of the Riblett wing which ...
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2answers
1k views

How much does it cost to design a jetliner's wing?

The cost of designing a brand new wing for a jetliner, compared to modifying an existing one—with or without the changes to the production line—how is it estimated? Related questions (bonus): Are ...
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1answer
2k views

Why are there so few aircraft that had inhabited wings?

According to an answer by John Frazer The only successful plane with inhabited wing might have been the Ju-38 Is this true? In the whole history of aviation there was only one aeroplane with ...
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3answers
3k views

Why do Airbus aircraft typically have less wing flex than Boeing aircraft?

I was watching this video on YouTube about Boeing vs Airbus aircraft, and at around the 5:09 mark the female pilot stated that Airbus wings are much "stiffer" and "less aerodynamic" compared to Boeing'...
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1answer
542 views

Does it make sense to use a canard in combination with a conventional aft elevator control surface?

I am designing a UAV and have settled on a canard design. However, I’m curious whether it would be helpful to have a typical horizontal stabilizer behind the wing as well as a canard wing in front of ...
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3answers
830 views

Why do some aircraft have symmetrical tip airfoils while others do not?

On some aircraft, the tip airfoil is symmetrical, while others carry their root foil all the way through the tip. It would seem an aerodynamic disadvantage to have a non-symmetric airfoil at the tip ...
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1answer
991 views

Why does some “Fighter Jets” have “Pitch changers” on the front? [duplicate]

F15 with "Pitch Changers": The J20 with "Pitch Changers": Now, it looks odd when you see a plane with "Pitch Changers" on the front. So what are they and why they are on the front in the J20 ...
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2answers
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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0answers
87 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 ...
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1answer
502 views

Which FAA or EASA regulation does prevent a high wing to cross the passenger compartment?

I'm looking for reference subpart and eventually chapter in either FAA or EASA regulation where it is stated that for passenger aircraft with high wing passenger compartment can not be interrupted by ...
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1answer
8k views

How are Cd and Cl calculated from Cp data?

Given pressure coefficient data for corresponding x/c (position along chord) values on a wing, I am looking to calculate coefficients of drag and lift. Here's what I have: b, MAC, S, sweep angles at ...
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1answer
259 views

In Polikarpov I-153, Were the gulled wings very important?

Lets look to the I153 It looks like it was made in order to make space for pilot to see its front just like here But What about in the aerodynamics study ? Are Gulled wing design very important ...
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3answers
2k views

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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1answer
2k views

Which are some planes shaped like an inverted wing?

To understand my question better, let's consider the priciple behind the lift generated by the wing - The upper surface of the air-foil is curved to deflect the air downwards using the Coanda effect. ...
6
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3answers
1k views

Is it practical to integrate turbofan or ramjet engines into an airliner wing?

The de Havilland Comet had turbojet engines integrated into its wings, such that its nacelles were mostly flush with the wings like so: (wikimedia.org) I recognize that turbofan engines are ...

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