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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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19 views

Does the wing to fuselage fittings of an airplane ever experience shear load?

Do wing attach fittings of semi-cantilevered plane (i.e. ultralights) ever get subjected to shear force? For example during roll, does the centrifugal force of the wings load the wing attach fittings ...
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7answers
16k views

Why are fuel tanks located in wings?

Passenger aircraft have fuel tanks in the wings. Why? What are the advantages and disadvantages of this location ? examples of disadvantages I would suspect: added weight increases the structural ...
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1answer
55 views

What should be the relative positions of a wing's aerodynamic center and center of gravity?

A positively cambered wing with finite length L has its aerodynamic center AC located 25% from the wing's leading edge. What about the CG of the wing itself (not the CG of the whole plane)? Is there ...
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1answer
132 views

Does a rotating control surface change the wing area?

It might seem like a silly question, but bear with me. I am using the standard formula to calculate the lift force of a wing. L = (1/2) d v2 s CL My question related to the s part of the formula. ...
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0answers
19 views

How can Schrenk approximation be used to model lift load on a rectangular wing?

How can I use Schrenk approximation to calculate load distribution on my rectangular wing? A worked example will be appreciated.
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1answer
68 views

Why is A320's CG optimum position at 25% MAC?

I have read a320's optimum CG position is 25% MAC. But, the aerodynamic center is also at 25% of chord. So since CG and aerodynamic center at the same position, there would be no moment arm of lift, ...
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3answers
180 views

Are there any specific weight or structural reasons to choose low vs. high wings for a cargo aircraft?

I have a large cargo aircraft concept and I am debating between a high or low wing. It seems like both are viable, but intuitively it seems structurally harder to support a high wing. Alternatively ...
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1answer
166 views

What are these bomb-shaped things attached to some propeller aircraft? [duplicate]

I've seen them on a few prop machines and searched here and via Google but couldn't find anything.
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0answers
91 views

Where are the black triangle'd seats? [duplicate]

There are two windows marked with a black triangle, which indicate that they provide the best view for the wing, when the crew needs visual. Since A320s are probably the most popular birds out there ...
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2answers
103 views

Straight Wings VS Delta Wings, Variable wing with Forward swept capability [duplicate]

What are the Pros and Cons (Advantages and Disadvantages) of a Delta wing and a Straight wing against each other, and if a Variable wing with a capability to become a Forward Swept wing is even ...
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1answer
93 views

Circular arc airfoil wing: why does the wing nose down twist due to camber?

I am reading this paper: "Computational Investigation of Microscale Shrouded Rotor Aerodynamics in Hover" Vinod K. Lakshminarayan, James D. Baeder ; JOURNAL OF THE AMERICAN HELICOPTER SOCIETY56, ...
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2answers
80 views

How to calculate the amount of weight my plane can takeoff with?

This is how I approached this problem- My takeoff run is limited. So, depending on my configuration I calculated the maximum possible velocity I can attain in my groundroll. I assumed that at the end ...
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3answers
244 views

Is lift force less than weight during a descent?

In the above image lift is the same during a climb and during a descent. Is lift force not supposed to be less than weight during a descent? Secondly, does descending at an airspeed much lower than ...
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0answers
28 views

Calculating induced drag approximation using XFoil generated parasitic drag

I am trying to do rough predictions of induced drag using the XFoil results for parasitic drag. To do so, I am using the lifting line equation for induced drag and the Oswald efficiency number: $C_D=...
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1answer
117 views

the usage of thin airfoils for high-speed flight [closed]

what is The usage of thin aerofoils for high-speed flight I tried those answers:  They are perfect for controlling the local angle of attack, for instance in turbomachinery and flaps.  At ...
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0answers
31 views

How to calculate the shear centre of a wing?

How is shear centre of a wings calculated? i.e. how can I calculate the wing shear centre of a two spar wing with main spar at 0% of wing chord and rear spar at 75% of wing chord? (Assuming the two ...
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1answer
97 views

What is the function of a sweep cable?

This is Goat3 ultralight with sweep cables,what is the fuction of these sweep cables?
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1answer
118 views

What is the purpose of this span wise “false spar” on Affordaplane wings?

This is the wing of an Affordaplane Ultralight,what is the use of those spanwise foam boards between the foam ribs,I know it's not for aesthetics.
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1answer
166 views

What are these lumps on the top side of the wings of military aircraft? [closed]

There is an online video game called War Thunder that lets you fly various planes from roughly the 30s to the late 50s. It has some pretty detailed models, and I've noticed these lumps on the wings of ...
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2answers
650 views

Can “a drone” damage the wing of “an aeroplane” to the extent it actually threatens its ability to fly?

I stumbled across this video by the University of Dayton, showcasing the amount of damage a certain type of drone can do to a wing, and they wrote a whole article about it. While most of said article ...
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2answers
73 views

Could reduced-lift wingtips allow an airplane to generate less wake turbulence?

Would it be possible to weaken the wake vortices generated by a large aircraft (which can be dangerous to smaller aircraft behind the large aircraft, and are the limiting factor determining how ...
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2answers
1k views

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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2answers
80 views

To determine wing loading, do you need to subtract the weight of the wing from the gross weight?

Is it true that I must subtract the weight of my ultralight wing from the gross weight of my airplane inorder to determine the wing loading of my ultralight airplane? If yes,why is this so? I read a ...
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2answers
107 views

In the attached image of the Hoffman development of Arup design, the wing is shaped in a somehow anhedral way. Why?

Most airplanes of its days had a Dihedral, or a wing thickness tapering with a 'V' shape, this one is the opposite, hints exist as done to avoid: 'Dutch Roll', or that the ordinary way will impair ...
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3answers
117 views

Finding the center of gravity/centroid of an airfoil?

I'm in the process of building myself a wing frame out of balsa wood. However, as a high school student that's just started aerospace engineering, I'm not really sure how to go about it in some ways. ...
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1answer
44 views

Accounting for torsional forces during wing load tests

According to this aviation.se question, wing load tests are done by placing weights on the wings (upside down). This unfortunately only tests the wings bending loads (for cantilever wings) and the ...
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1answer
60 views

Is the shear centre of a wing the same as its aerodynamic centre?

How can the shear centre of a wing be located and is it the same as the aerodynamic centre of a wing? Lastly, I know how the centre of pressure interacts with the aerodynamic centre but not the wing'...
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1answer
80 views

What are the rules of airfoil thickness from root to tip on tapered wings?

I'm doing some research on wings and airfoils used in the 30s and 40s, and I'm trying to understand the rules about airfoil proportional thickness changes across the wing (root to tip) on tapered ...
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2answers
100 views

Velocity of air flow around aerofoil

To find the velocity of the air flow at each section of the aerofoil, am I right to say that the horizonatal velocity of the air flow is constant throughout the chord while the vertical component of ...
7
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1answer
931 views

Why does a rectangular wing stall first at the root?

Why does a rectangular wing stall first at the root? as opposed to tapering of the wing which causes the stall at the tip and moving inboard?
6
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1answer
167 views

Can this vane prevent/delay wing stall?

Given that a stall results from the airflow over the top of the wing separating from the wing at high angles of attack, would it be possible to prevent, or at least ameliorate, a stall by deflecting ...
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2answers
164 views

Do stall strips mean that wing washout is not required?

The Wikipedia page on stall strips states that AA-1 Yankee airplanes used stall strips to avoid tip stalls (and spins) because wing washout couldn't be used. So my question is: can two stall strips ...
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0answers
228 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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1answer
127 views

How can an airplane roll,yaw and pitch up and down without control surfaces?

This is Sprat 103 ultralight, it has no ailerons, and no ruddervator ( on its v-tail),how then does it fly controllably?
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3answers
183 views

Bed sheet as wing skin?

https://en.m.wikipedia.org/wiki/Aircraft_fabric_covering This article states several early aircrafts that successfully used cotton as wing skin including Wright flyer. "Colditz Cock" glider had its ...
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0answers
29 views

How does pitch moment affect load distribution on a wing?

I am to load test an airplane wing,how does pitch moment(Cm) comes into play or is it insignificant in relation to wing load distribution? St cyr 24 is the airfoil of the wings, at 10° Cm=0.07,how ...
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1answer
76 views

Is aspect ratio efficiency related to the momentum added to the air?

Many years ago I was taught that for generating lift or propulsion, lower losses were associated with imparting less momentum change to a larger volume of air, and higher losses were seen when ...
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1answer
93 views

How do wing ribs withstand lateral lift force?

During roll,there is a vertical component of lift that keeps the plane in the air and an horizontal component that actually rolls the plane,how are wing ribs designed to help withstand this vertical(...
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2answers
191 views

Does wing paint colour improve airplane fuel efficiency?

If birds that fly very long distances like seabirds have darker colours on top of the wings and lighter colours underneath the wing, is it possible that painting airplane wings similarly may improve ...
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1answer
144 views

Strut braced or wire braced airplane wings?

For an ultralight (or other airplane designed for slow flight), would a strut-braced or wire-braced wing be more efficient aerodynamically?
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3answers
269 views

Do high-wingers have dihedral?

I know that high wingers have an inherent dihedral effect. Are there any examples of high wing aircrafts with a dihedral? If so, what is the reason behind it?
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1answer
99 views

How does washout affect the wing incidence required?

In theory: if I wanted to build an model aircraft with (zero zero) wing/tail incidence, how would washout affect the root incidence required? E.g. if a wing has 2 degrees washout at the tip, would ...
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4answers
419 views

What is the total wing surface area of the A320?

I was trying to calculate the total area of an A320, and in this link I found the wing area and tail area. But here I read that the wing area is just the 2D projection of the wing. So if I wanted to ...
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2answers
920 views

What is an aileron bushing?

What is an aileron bushing,and what's its use?
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1answer
102 views

Is aerodynamic flutter speed dependent?

Is it possible for control surface flutter to occur at low Reynolds and low speed? If yes,why don't Ultralights have counter weights or tail sting mass to immune the control surfaces against flutter ...
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2answers
111 views

Is c.g rear or fore of wing leading edge?

This video states that the c.g of most non tapered airplane is 25%-30% of wing chord REAR of the leading edge.The aerodynamic center(a.c) of most wing is 25% rear of the leading edge ....Does this ...
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1answer
168 views

What is wing trammelling?

What is wing trammelling and how does it affect wing stability and performance?
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1answer
138 views

Is the shape of the Bell X-1 wing on Virgin Galactic's VSS Unity's artwork correct?

This answer to the Space SE question What do these patterns on Virgin Galactic's VSS Unity represent, and how are they applied? indicates that one of the aerospacecraft representations on the Unity is ...
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1answer
114 views

Do mono spar wings need compression strut(or ribs)?

Loyolksip Regarding airplane wings, are compression struts needed in a mono spar wing? Secondly, are anti drag and drag wires needed in a mono spar wings?
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0answers
174 views

How to calculate the shear force, and the bending and torsion moments on a wing?

I want to calculate the loads (shear force, bending and torsion moments). Assuming I have the force distribution along all the surfaces of the aircraft, my starting point is to consider the wing (and ...