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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0answers
91 views

Could an aircraft have squashable wings that get thicker as it flies faster?

As I understand, for high speed subsonic flight a thicker wing is more aerodynamic, and at low speed, a thin wing is preferable. Could aircraft which range in speed from 180 to 620 knots (most ...
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Whats the effect of aerofoil camber and thickness on Clmax and Cdmin?

Does anyone have any experimental references/wind tunnel testing testing data for various thickness and/or camber?
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98 views

Does the center of lift have to be in line with the center of mass?

Imagine 2 theoretical planes, A and B, shown in the image below. The center of mass is yellow, and the center of lift is blue. Would plane A and plane B work as well as an airplane with the center of ...
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4answers
195 views

Why does a mid-wing aircraft have lower drag?

Why does an airplane having a mid-wing have lower drag than high- or low-wing configuration even if they have wing of same shape and size? This article (PDF) claims it's true.
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3answers
191 views

Would this quadrilateral-shaped airfoil produce lift with a zero angle of attack?

I have been recently studying the shapes and characteristics of different high-lift airfoils that have been used for VTOL aircrafts. While studying these different designs today, a particular ...
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3answers
179 views

Has anyone built an aircraft with a flat ring wing?

When I try to search for circular wing aircraft, everything I find has the wing loop up over the top of the craft. What I want to see, however, is basically an Aerobie Flying Ring, but with a ...
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2answers
87 views

Does dihedral improve roll stability in gusty conditions?

Against roll instability, should I add more dihedral/a high wing? I'm trying to build an RC plane that can handle windy conditions. For that I want extraordinary aerodynamic stability. For ...
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1answer
80 views

Why this inertial regulator of dragonfly wing pitch reduces self-excited coupled flapping and feathering vibrations and improves gliding flight speed

The pterostigma of insect wings an inertial regulator of wing pitch is linked in this answer to Why do dragonflies have these special little spots on their wings? (open access copy here) The Summary ...
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1answer
59 views

How to calculate the radius of a turn as a function of speed, bank, wing-loading, and Cl?

Although the question of how to calculate the radius of a turn of an aircraft has been answered before using only the speed and the bank angle, the reality is that 2 aircraft with the same speed and ...
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1answer
147 views

What is an augmentor wing?

What is an augmentor wing in the context of STOL aircrafts? and is it still used today? This seems to be a term that I can only find in NASA aerodynamics (specifically powered-lift) research papers in ...
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356 views

The wing has a pressure gradient along the AB direction, is there a pressure gradient along the CD direction?

The wing has a pressure gradient along the AB direction, is there a pressure gradient along the CD direction?
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223 views

What is the reason why dihedrals are used when building a plane? [duplicate]

How does dihedral affect flight characteristics of a plane? I know it increases stability, however is it the only reason why it is implemented? If so, aren’t there more effective methods to stabilize ...
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1answer
255 views

What are the differences between battens and ribs?

What are the differences between battens and ribs?
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105 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 ...
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4answers
220 views

Why did wings start to be made with aluminium skin instead of fabric?

Why did engineers start designing planes with aluminium skin on the wings instead of fabric covering? While the force of lift acts on the skin, to my knowledge it is not subject to high stresses
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1answer
125 views

Could a wing be designed to exploit both normal flying and ground effect?

Ground Effect planes' wings are stubby and the height over the ground or water is limited to wing span. Could a wing be designed to exploit both normal flying and ground effect together to give the ...
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3answers
164 views

What is the impact of camber on CLmax?

I was reading Aerodynamics for Engineering Students by Houghton and saw the following graph: A lot of other sources say that increasing camber increases CLmax, like the graph below. I am a little ...
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135 views

What are different components of an engine pylon?

What are the different structural components that are inside the fairing of engine pylon and what are the functions of each part? The pylons for each aircraft are made of Ti-64 alloys, can they be ...
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1answer
47 views

Can an airfoil have multiple aerodynamic centers?

Aerodynamic center is a point where the moment is independent of angle of attack. Can we have 2 or more such points? Does it necessarily lie inside the airfoil?
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4answers
163 views

Will it be more efficient if airplanes flap like birds? [duplicate]

Many airplanes have parts that are designed to mimic some features of animals. I have also read that birds are incredibly more efficient than most of the airplanes we see today. I wonder, will the ...
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1answer
74 views

Which among the two contributes most of the lift, the upper or lower surface of the airfoil? [duplicate]

I see some explanations that lift is due to the suction of low pressure on the top surface of the wing and deflecting down of airflow on the bottom which results to upward force lift. I wonder, which ...
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41 views

How to correct dynamic stability of UAV fuselages?

I was trying to design a fuselage model of UAV with considering lift coefficient (CL), after this I analyzed stability of both wing on fuselage. First I did the individual analysis for wing and ...
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2answers
12k views

What are the bumps in the F-22 Raptor wing for?

As you can see in the picture there are several bulges or bumps in the wing that are located in the aileron and flaps. Somebody told me these are to hide the linear actuator, pushrod, and control horn....
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Why is hybrid laminar flow control preferred for swept wings over other options?

As I understand it, a (the?) major form of laminar-to-turbulent transition on the swept wings of large jets is the crossflow caused by the sweep. One way to control this is laminar flow control by ...
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1answer
202 views

Is/why isn't the Antonov 124 to 225 wing upgrade method common?

I'm told that wing redesigns (edit: for tapered, swept wings) are difficult, so variants of a model often do with a common wing optimized for the middle member. But then I read the following: Based ...
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1answer
64 views

How does wing shape impact shock structure?

I am trying to understand what the 3D shock structure would be for a wing in supersonic flow. Suppose we have a wing which is made of double-wedge airfoil cross-sections. If we view the shock ...
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1answer
60 views

How do you calculate the wing moment coefficient knowing the moment at each spanwise station?

A lot of theoretical formulas exist for finding the moment coefficient for airfoils, but I have been confused by how to get the moments for a wing. I came up with three related questions that have ...
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114 views

How can a designer deal with a strict requirement when designing an aircraft?

I'm working on designing an aircraft with some specific requirements (Vstall, Vmax, Ceiling, Payload, Range, RoC, Slanding/takeoff etc). I'm following Anderson's and Raymer's ways (trying to find the ...
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1answer
145 views

What is the angle of Incidence of wing of Airbus A320?

What is the Angle of Incidence/ Mounting Angle of the wing of AIRBUS A320?
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2answers
362 views

Why are there so few high-wing jetliners? [duplicate]

So far, we have only seen a few civilian jet transports with high wings. All of them BAe 146, Do 328JET, seem to be regional jets. Yet military jet transports are almost completely high-wing. Why aren'...
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1answer
31 views

Can the wing stagnation point be bled off and used for laminar flow control?

The stagnation point at the leading edge contains slow-moving, slightly compressed air. This sounds ideal for laminar flow control. This slow air will create little losses in ducts, and it's pressure ...
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1answer
156 views

Could an arrow planform be better for a supersonic aircraft than a delta? Why?

From this review paper Page 11: Strut-bracing for the SST allows very signi®cant reductions in both vortex and wave DDL via an extreme arrow con®guration and could be favourable to LFC via ...
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1answer
122 views

Would supersonic bi/tri/multiplane wings have less lift interference drag than a subsonic version?

Biplane wings interfere with each other, reducing the total lift often to about only 20% more than a mono wing of the same chord and span. But at supersonic speeds - say, Mach 2, where Mach angle is ...
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29 views

How is the wingspan of a wing measured if it has a dihedral? [duplicate]

I am having some confusion regarding how the wingspan is measured, I just wanted some clarity because this was bugging me while I was reading about aircraft wings. According to NASA's "Wing Geometry ...
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4answers
464 views

How do slats actually work?

I want to know what is the difference between slats and flaps and the mechanism of the slats This what I know and researched about flaps: Flaps are a kind of high-lift device used to reduce the ...
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2answers
401 views

Why does the mass penalty of cantilever vs externally braced wing decrease with aircraft size?

From Wikipedia Cantilever wings require a much heavier spar than would otherwise be needed in cable-stayed designs. However, as the size of an aircraft increases, the additional weight penalty ...
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1answer
147 views

Why do airlines not paint the wings on their livery? Why? [duplicate]

Does anyone know why airlines do not paint the wings on their aircraft? What is the reason why?
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2answers
392 views

Can aircraft fly without wings? [duplicate]

Is it possible that a aircraft can fly without having wings? I am wondering if somehow it can fly then will aircraft will be able to maintain the balance.
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1answer
73 views

What exactly is “plunge?”

I'm doing a project in which i'm attempting to model the motion of a wing using a system of second order differential equations. This is a 2-degree-of-freedom model based on the quantities pitch, a(t),...
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1answer
118 views

What are typical values of the lift-to-drag ratio for normal small aircraft?

Hi I am trying to do a rough estimation of forces acting on an aircraft wing and would like to know what kind of lift to drag ratio is normal. The exact profile hasn't been chosen yet, but the ...
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22 views

VLM at High Speeds and High Angle of Attack

I want to analyze a plane of the size and speed of a commercial jetliner. I have made the model of it on OpenVSP. I am using VSPAero's Vortice Lattice Method for the same. I want to analyze the plane ...
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Is there any go to formula in the designing of a winglet? [duplicate]

we have to design a commercial airplane as a part of a college assignment and i was wondering if there are any rule of thumb /formulas involved in the designing of winglets? Or does one have to assume ...
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1answer
190 views

How can a designer maximize the glide ratio of an aircraft with low aspect ratio wings, other than by increasing the aspect ratio?

As I understand it, the gliding range is given by a lift to drag ratio—hence to increase the gliding range, I would want to increase the lift and reduce the drag as much as possible. To that end, ...
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1answer
47 views

What is the threshold between high Aspect Ratios and low Aspect Ratios?

Oftentimes when describing flying organisms and vehicles, their wings are said to have a "high aspect ratio" or a "low aspect ratio". Sometimes the papers (that I read) gave the numbers, but more ...
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1answer
199 views

Design lift coefficient of an airfoil

I have the design lift coefficient of the plane during the cruise condition. Now, I want to calculate the lift coefficient required by the airfoil which makes up the wing, taking into account the ...
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1answer
174 views

Can such an aircraft take off vertically?

The compressor ejects compressed air from the gap at high speed. The red arrow represents the path of compressed air. It is lift that adjusts the speed of the compressed air to adjust the aircraft.
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2answers
95 views

On which axis do we measure angle of attack and airspeed?

The lift value depends on the relative airspeed of the plane. That's what every website says without anymore explainations. But as we are talking about lift, are we talking about the relative speed ...
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1answer
103 views

How is wing area defined?

When the plain "wing area" is given in basic aircraft specifications, what area does it usually refer to? Is the same area used for calculating the wing loading? For example I have a fuller ...
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4answers
250 views

Why do flaps retract?

Why do flaps retract? I know, it might seem obvious at first, because of drag, but instead of retracting the flaps, can't they just make the flaps flexible enough to get into a reduced drag position, ...
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172 views

Why do shockwaves progressively move aft as speed increses?

As an airfoil moves from subsonic to supersonic, the shocks that develop over the surface move progressively toward the trailing edge. What is the physical explanation for this behavior? As a side ...

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