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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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3
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2answers
108 views

Why do airfoils in an airplane's wings have different shape and size along its span?

Why wings of an airplane consist of different shape and size of airfoil. What will happen if the thickness of wing are same throughout the wing?
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1answer
65 views

F4u race wing design [duplicate]

Can anyone suggest a good airfoil for racing the F4U Corsair? I'm building an RC model but I want it to be fast unlike scale warbird. Any suggestions on wing design and airfoil would be greatly ...
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6answers
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Can a wing generate lift in excess of its aircraft's weight?

"For a plane or bird to fly, its wings must produce enough lift to equal its weight. " I got that excerpt from "https://www.sciencelearn.org.nz/resources/300-wings-and-lift". My questions: (1) Can ...
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1answer
109 views

Does turbulent flow encourage/avert flow separation?

I know that turbulent flow has more energy than laminar flow and hence can sustain adverse pressure gradient for a longer period of time. It basically delays flows separation. But referring to this ...
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1answer
245 views

What is the outer kink on the airbus 340-600?

I was checking some information about the a340-600 and got this statement: "thickness/ chord ratios 15.25 per cent at root, 11.27 per cent at inner kink, 9.86 per cent at outer kink and 10.60 per cent ...
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1answer
830 views

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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0answers
40 views

Types of wings aircrafts use [duplicate]

Now I know that aircrafts can use swept back wings. But I want know why sometimes they don't use the wings mentioned below: 1) Rectangular wings 2) Trapezoidal wings 3) Delta wings 4) Forward Swept ...
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1answer
86 views

Building optimal RC flying wing [closed]

I have an EMAX motor that operates at maximum efficiency generating 200g of thurst. This is the only fixed parameter I have. How do I find the most efficient wing design for this flying wing, ...
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0answers
41 views

Will this thick annular wing have a nose-up pitching moment in tilted forward flight?

As you know, a ducted fan/propeller (Figure C) has a strong tendency to pitch the nose-up during "tilted " forward flight due to the front part of ductlip itself generating more lift. Thus any ...
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3answers
165 views

What is the relationship between centre of gravity, centre of pressure and pitch?

Ok so I've got a couple of questions regarding CG, CP and pitch 1) When the aircraft is taking off, is the tail down force required to pitch up the aircraft high? Because the aircraft always has a ...
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1answer
88 views

How do the wings connect to the centre wing box?

First of all does the centre wing box form part of the fuselage as it's in the centre of the fuselage? Secondly how does the wing spars connect to this centre wing box to hold everything together?
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3answers
242 views

What effect does wing loading (high and low) have on aircraft performance?

I've read that stalling speed is partly determined by wing loading. Correct me of I'm wrong - "Aircraft with high loading have more weight relative to their wing area hence the stall speed is ...
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2answers
101 views

What are the handling effects of converting a dihedral wing to polyhedral?

I'm looking at plans to build a radio controlled (RC) glider that is launched by rocket boost mainly as a park flyer. I've been given a set of plans for a model that is a dihedral wing (see attached ...
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1answer
107 views

How do I choose the correct params?

I am very new to airplane design. I am working on this project to design a flying wing glider (no propeller) that would glide in a circular pattern with a fixed radius of 250 m after being released at ...
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1answer
61 views

What parameters to focus on when constructing a wing for turning? [closed]

I want to construct a flying wing (glider) with the sole purpose of performing a helical turn (or a circular turn with no propulsion attached) with somewhat of a fixed radius. What should be the main ...
4
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1answer
204 views

Is it coincidence that the B-2 and YB-49 flying wings have exactly the same wingspan?

Development of the Northrop Grumman B-2 Spirit began as far back as 1979; however, this was nearly thirty years after the last flight of Northrop's earlier flying wing the YB-49. There aren't many ...
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0answers
33 views

Where can I find data comparing coefficient of lift (and drag) curves for any airfoil with and without flaps deployed

I'm doing my masters thesis on a FISHBAC wing so I'm hoping to find coefficient of lift and drag curves for any airfoil with and without (any type of) flaps deployed (and preferably leading edge ...
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2answers
156 views

Why can't commercial aircraft have a wing boundary layer suction system?

I've read that NASA's boundary layer suction system on the wings can reduce drag by removing the boundary layer through the suction holes. If this can reduce a lot of drag (hence improving fuel ...
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0answers
39 views

Could box-wing aircrafts be the plane of the future [duplicate]

I've read that box-wing aircrafts can reduce wingtip vortices caused by induced drag hence saving up a lot of fuel and hence able to carry more passengers. Would we able to see such aircrafts in the ...
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0answers
96 views

Why don't commercial aircraft have variable sweep wings? [duplicate]

I was wondering why commercial aircraft don't have variable sweep wings just like the Bell X-5 did? By sweeping the wing further at high altitude it helps the aircraft move faster and also it helps ...
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0answers
84 views

Are there any lift or lift coefficient equations which factor in the flap deflection angle?

I'm asking this because I tested a NACA 2412 wing with an adjustable flap in a subsonic wind tunnel and I'm getting the lowest Cl values for the highest flap deflection angle.. which to my knowledge ...
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4answers
187 views

Why are early wing planforms mostly rectangular?

I am looking at the history of wing planforms, and I am having trouble finding reasons for why the wright flier and other early aircraft were built with rectangular wings. I thought it was due to ...
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0answers
29 views

Calculating Lift of a closed-wing drone

A group of students and I are designing a theoretical closed-wing drone and need to calculate lift based on the NASA lift equation. We've designed fixed-wing aircraft before and when it came to ...
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2answers
435 views

Why was the B-52's wet wing more susceptible to fatigue than its dry wing, and not less?

After years of carrying all its fuel in the fuselage, the B-52 transitioned to a wet wing (where the wing structure is used as one or more fuel tanks) with the B-52G. This caused severe problems with ...
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1answer
104 views

Why did this delta wing generate a lower Cl at a higher wind tunnel velocity?

I'm an aerospace engineering student,and just did an aerodynamics lab in which we measured the lift & drag of a delta airfoil inside a wind tunnel between 0 and 40 degrees, in 5 degree increments, ...
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1answer
88 views

Which type of fan is better for wind tunnel testing?

I would like to build a small wind tunnel to test a miniaturized wing/airplane. I have two options, using axial blower (picture 1) or using centrifugal blower (picture 2). The first will be the wind ...
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1answer
166 views

Do the F-18's leading edge flaps deflect symmetrically in rolls?

When the F-18 Hornet does rolls, do the Leading Edge Flaps (LEFs) deflect symmetrically or is the deflection different on the left and right LEFs?
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Wing fuselage joint in small aeroplanes [duplicate]

I know that there are bolts to connect the centre wing boxes of the fuselage and wings in large aircraft, but what are the methods of connecting the wings and fuselage of small aeroplanes? I’m mostly ...
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2answers
256 views

Is moving payload masses during flight to restore mass centering, or to avoid having to trim, a useful approach?

Note: Title was previously "Movable big missiles/bombs/tanks under fighter jets: conceivable?" Example: lateral weight distribution in fighters Fighter-bombers jets are small and lightweight in ...
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1answer
100 views

Is the “wing area” of a biplane the projected area or the total area?

When you specify the wing area of a biplane, do you specify the planform area (the projected area) or do you specify the effective area of both the wings?
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3answers
5k views

Why do non-aerobatic aircraft have a negative G limit?

Why do airplane wings have limit load of both positive and negative g's (e.g., the Weedhopper ultralight has a load factor of +5 and -2gs). Why not just have a positive limit load since most airplanes ...
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1answer
7k views

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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0answers
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Do winglets really improve efficiency and reduce drag? [duplicate]

Below are some pictures of various fixed wing aircraft with winglets. It is widely accepted that these winglets will improve an airplane's performance by reducing drag and therefore improving fuel ...
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1answer
358 views

Why do wings prefer laminar flow if cd is lower for turbulent flows?

Can anyone please explain to me why we prefer to maintain laminar flow over wings, despite the fact that the overall coefficient of drag appears to reduce as the Reynolds Number increases? I have read ...
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5answers
7k views

Could the principle of owls' silent flight be used for stealth aircraft?

I was wondering about the ability of owls to fly so silently. Is it because they flap gently, they flap less often or do is their structure responsible? I was thinking their principle of stalking can ...
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0answers
135 views

What is effective airflow?

As I understood, when the relative airflow meets the wing it changes, and the resulting flow is called effective airflow?
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0answers
90 views

What replacement wings are available for old F-16's?

Eventually, material fatigue will force any aircraft to either be grounded or have its wings rebuilt, or replaced. And please, correct me if I'm wrong. For the F-16, if one were to replace its wings, ...
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1answer
178 views

Why does the stall angle decrease as camber increases?

I have a rough idea about why $C_{{l}_{max}}$ increases with increase in camber. But I can't explain why the stall angle decreases simultaneously.
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1answer
96 views

Downwash distribution on basis of Lift distribution

I am new here so I might make some elementary mistakes. Correct me if I am wrong. I just stumbled upon the downwash distribution for a given lift per unit span distribution along the wingspan. I have ...
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2answers
211 views

Why the Mig21 don't use the ailerons like control surfaces on delta wings at landings or take off?

Mig21 is a delta wing , so why do not use the ailerons like any other delta's ? For lowering the approach and touch down speed. It is not possible that?
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2answers
3k views

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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4answers
3k views

Why are the wings of some modern gliders tadpole shaped?

Why are the wings of some modern gliders tadpole shaped, rather than teardrop shaped? An example is the Schleicher ASG 29. Or did they just add a flat plate at the trailing edge for the flaps and ...
2
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1answer
108 views

Do commercial passenger airplanes have cambered airfoils?

It seems to me that they logically would, since they have no need to fly upside down like an aerobatic plane would (so they would not need a symmetric airfoil for any conceivable reason). That being ...
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1answer
67 views

What are the effects of dihedral on net lift of a wing? [duplicate]

I read somewhere on the internet that dihedral decreases wing lift,so my question is will dihedral decrease the lift of an airplane wing since the wings are attached to the fuselage at an angle ? If ...
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4answers
107 views

Where is the compression on a compression strut in a tube and fabric airplane coming from?

I understand the functions of every part of a tube and fabric (two spar) ultralight wings and the loads they carry but what keeps puzzling me is the compression strut of a two spar wing as seen above. ...
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3answers
360 views

Are exoskeleton wings technically possible?

While there have been a robot simulating a bird, could be there also an exoskeleton wing system for a human? Main design considerations: a) only human powered b) using an additional, or exclusive ...
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1answer
81 views

What is the drag optimized wing form for given lift and bending moment?

I am trying to build a passive hydrofoil board. Something like this: I want to use wood and i am coming to the conclusion that i want to optimize drag for a given ...
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3answers
1k views

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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2answers
127 views

What is the function of cross bracing of interplane strut?

Pic 1 is the top and lower wing of a biplane called Bloop Ultralight,what is the function of the cross bracing between the interplane struts as seen in pic 1(I'm not talking about landing and flying ...
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2answers
96 views

Can the back tail of an airplane move the neutral point backwards?

I'm currently in the process of designing a prototype aircraft and since I don't have very much experience with this I have the following question: I know that the center of gravity of an airplane ...