Questions tagged [airfoil]
The 2D shape of a section of aircraft wing.
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How do I get rid of this weird line along the x-axis when importing an airfoil into XFLR5?
Whenever I try to import an airfoil into XFLR5, I always notice this weird line along the x-axis as you can see in the picture.
Is there a way to somehow get rid of this line?
I'd be thankful for any ...
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Are there any sources that contain information on the airfoils of the Boeing 737-500 and 737NG Aircraft?
I have found some information about this on airfoiltools.com (http://airfoiltools.com/airfoil/details?airfoil=b737a-il) but it doesn't specify the exact version of the aircraft, as the generations ...
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Are there studies to find surface treatments to reduce the drag of an airfoil?
I know that by designing an airplane or a car close to a teardrop, we can reduce the drag. My question has to do with the surface friction treatment. Some torpedoes glide in water more efficiently ...
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Can composite material be used in leading edge of airfoil instead of aluminium through Additive manufacturing?
I want to know about, is it possible to replace aluminium by additively manufactured leading edge of airfoil by changing different infill patterns to improve the impct strength from bird impact on it.
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Moving from 2D wing to 3D wing design
In terms of the design perspective of an Aircraft, once we decide on the airfoil that would be used for the wing, how would an Aerodynamics Engineer (or you) proceed to construct the wing? The ...
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Are winglets symmetric airfoils? (Cessna Citation M2)
I want to simulate the Cessna citation M2 in XFLR as a student homework assignment. This aircraft has a NASA high-speed 0213 airfoil (which is not symmetric) and a winglet, which can be seen in the ...
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P-8A Poseidon Airfoil type
Could someone help me find out what airfoil type is used on the P-8A Poseidon symmetrical, conventional, thin or supercritical airfoil?
It seems to be, that the Boeing 737-800, like many commercial ...
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General Thin Airfoil Theory
I can't understand where the equation in the blue circle comes from or is derived from, I know it says the sum of the perpendecular components should be zero, but can you explain visually? and what ...
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Why does a flat plate create less lift than an airfoil at the same AoA?
This picture of the lift curve slopes for four-digit NACA airfoils and a flat plate is from another question on this topic. It shows that at the same positive AoA, a flat plate generates less lift ...
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How to Define Aerodynamic Center for Real-World Airforil?
When using thin airfoil theory, there exist a point that the moment about this point does not vary with Cl, which is the aerodynamic center.
However for most of the real-world airfoils, Cm does vary ...
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How do I plot Cd vs Re graphs for an airfoil?
I am looking for a platform where I can plot the value of the drag coefficient of an airfoil for a range of Reynolds numbers (Cd vs Re plots). I wish to analyze the trend of Cd with changing Re and ...
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Sluggish response to transients in very high L/D ratio airfoils
A sailplane has very high aspect-ratio wings and can have a glide ratio up to 70:1 (the wing L/D ratio is even higher since the fuselage adds drag).
The flow at such high L/D ratios for such long, ...
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Aerofoil selection for a Horizontal turbine [duplicate]
I'm currently having a bit of an issue selecting the type of aerofoil I would want to use in my ridge mounted wind turbine honours project. I want to select a high lift generating aerofoil at low ...
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Can a propeller with 90° pitching and symmetrical airfoils generate thrust?
Imagine we have a plane that is already moving at a speed $v_{plane}$. At a certain time $t=0$, a motor starts moving a propeller whose blades consist on symmetrical airfoils with $90^\circ$ of ...
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How to export cp vector plot obtained in xfoil?
How can I export an image of the plot showing the distribution of pressure coefficient vectors on the surface of an airfoil generated in Xfoil?
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What are the effects of having the aileron hinge line on the pressure side vs the suction side of a wing?
I have to choose where to place the hinge line of the aileron of a large remote control aircraft which is to be optimised for endurance. Which is the most optimal placement of the hinge line of ...
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Is the property of having a neutral point (aerodynamic centre) specific to an airfoil shape or will every arbitrary shape will have one?
Is the property of having a neutral point (aerodynamic centre) specific to an airfoil shape or will every arbitrary shape will have one?
Asking in mostly context of fuselages.
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Which airfoil is used on the Boeing 737 NG vertical stabilizer/rudder?
Does anyone know what airfoil Boeing uses on it's 737 NG's vertical stabilizer or the rudder itself? I can't seem to find the info anywhere and I need it for a university project.
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What are the complete assumptions and final conclusions from 'Thin Airfoil Theory' in aerodynamics?
I possess expertise in the field of aerospace structures, however I have recently been assigned an 'Aeroelasticity' analysis job at my workplace. In an effort to imbibe the fundamental knowledge which'...
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Trying to understand this pressure distribution over an aerofoil?
can someone please help me understand why the pressure is like that over the top and bottom surface of this aerofoil please?
Also, what do the arrows point out mean? Why are the front and end ones ...
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How to measure chord on a rounded trailing edge airfoil?
So, should I measure it by the rearmost point (in contact with the tangent line) or the point coinciding with the end of the camber line (represented by the line starting at the circumference center)?
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Can someone help me understand this aerofoil?
I came across this morphing aerofoil, but don’t understand how it works please?
Can someone explain also what the components are, like that box in the left?
I looked into that reference, but it’s a ...
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Is there an aerodynamic benefit of covering the underside of wings?
What is the nature and extent to the benefit of covering up the bottom of an airfoil?
It seems like all the early airplanes just had ribs and spars that were wrapped only on top, but then pretty soon ...
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How does increasing camber increase lift coefficient?
How does increasing the camber of an airfoil (like the NACA 0018) increase its coefficient of lift?
You're just curving the airfoil; I don't see how that increases lift for a given angle of attack?
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How to know what kinds of airfoil being used in a commercial propeller?
Suppose we know the 3D CAD model of a commercial propeller. Starting from that, we do the slicing to get the profile of airfoil being used to generate the complete shape of the propeller. How do we ...
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Center of Gravity, Aerodynamic Center and Center of Pressure, how do they connect?
I read an article that described static margin by taking the aerodynamic center and the center of gravity. It explained why the center of gravity has to be in front of the aerodynamic center for a ...
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Short Take Off and Landing, and Range
Can a plane have good range with a short take-off and landing (STOL) capability? If not, why. I have noticed STOL planes with lack the better good seat miles per gallon of planes that need longer ...
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Can a 747 airfoil be scaled down for smaller jet planes?
At the loss of its acrobatic ability, could an airfoil similar to the 747 be downsized to allow a small jet to climb higher and extend its range?
This plane with its wing profile is highly acrobatic, ...
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Are Foward Swept Wings for a Rear Propeller Airplane Feasible?
Would going with a forward swept wing design, with the same cord and length of the "A Wing", bring more air the the propeller and tail to increase range, power, or stability?
Consider the ...
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Is there a formula for calculating drag coefficient based on the 4 digit NACA airfoil?
Are there any existing formulas that can be used, or maybe some methods to derive an equation that can calculate the drag coefficient based on the NACA airfoil?
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Can wingtip vortices formed around an unswept wing produce vortex lift?
Vortex lift is a kind of aerodynamic lift force due to vortices formed along the leading edge of highly-swept (usually 60 degrees of swept angle or higher) wings at high angles of attack. The "...
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Is any airfoil design free to be used? Are they proprietary? Are NACA's airfoils proprietary? [duplicate]
Here I found database of various airfoils, including NACA's airfoil. Some of those airfoils seems like belong to particular company seen from their name, like belong to Boeing, Lockheed, RAF, Sikorsky,...
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Is there a formula for calculating lift coefficient based on the NACA airfoil?
Are there any formulas that can be used to calculate this?
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meanings of the numbers in the airfoil NACA 65(12)-10, where to find and plot
I am trying to plot an airfoil named NACA 65(12)-10 in javafoil. I found it in a few research articles. However, I am not sure from what series the airfoil is from. I tried looking it up on ...
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What airfoil can be used in making a turbofan engine fan blade? [duplicate]
The thing is, I am trying to make turbofan blades in Solidworks for a possible undergraduate thesis. I would like to know if there is any airfoil from the NACA series or anything plausible for this ...
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What airfoil family does turbofan's fan blades use?
The thing is, I am trying to make turbofan blades in Solidworks for a possible undergraduate thesis.
I want to know if there is any airfoil from the NACA series or any airfoil families plausible for ...
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Flying wing airfoil
What would be let say some of appropriate airfoils for flying wing RC model ? Wingspan arround 1200mm and speed arround 700 km/h.
Maybe MH64 or so ?
Thank you,
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Wind turbine airfoil on low Reynolds number aircraft
I read that the criteria considered when designing a wind turbine airfoil are slightly different to the ones when designing an airfoil for an aircraft. I was wondering, for a low Reynolds number ...
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How does camber location (xf/c) affect Cl max and stall angle of an airfoil [duplicate]
I'm trying to compare 4-digit airfoil and 5-digit airfoil about the effect of camber location towards Cl max and stall angle.
Is it correct if i assume the higher the camber location value the Cl max ...
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How can I choose an airfoil for inverted flight & high weight payload?
I have a project for university to design and build a model RC aircraft. Tt's main design principal is to carry a high payload, so I was thinking of going for a high camber, thick aerofoil. Hopefully ...
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Poor airfoil choice for wind turbine
I am getting involved in an outreach project where I can modify a small wind turbine with different wing geometries. Are there examples of standard airfoil designs with particularly poor Cl/Cd ...
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F1A COMPETITION GLIDER
I am working on a school project. I have looked up the airfoil database. There is a wide range of airfoils I have tried to optimize for my glider to no avail. How do i choose the best airfoil for a ...
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Variable-pitch propeller blade design (AOA)
For a variable pitch propeller where the angle of attack can be adjusted during flight, are the individual blades similar in design to standard propellers, with a low angle of attack at the edge of ...
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How to calculate lift and drag of commerical aircraft in different phases of flight?
What is the best way to mathematically calculate values of lift and drag forces, in different phases of flight: takeoff, climb, cruise, descent, and approach?
Edit: I have the idea of calculating the ...
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What specific improvements were made in supercritical airfoil design from 1980 - 2000?
I originally asked a question (Comparisons between the A340 and 747-200 wing: sweep angle and span) about the technological developments which allowed the Airbus A340 to have a wing with greater ...
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What naca airfoil is the closest to airfoils used by modern airliners?
I know boeing and airbus use propietary airfoils, but is there a single naca airfoil that is fairly representative of what modern airliners use?
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Converting 2d Cl to 3d [closed]
I am trying to convert 2d Cl data obtained from javafoil for a NACA 4412 into 3d data to be used for analysis of the airfoil, but cant find any equations online
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What is a "suction airfoil"?
I just stumbled upon this entry on airfoiltools.com:
http://airfoiltools.com/airfoil/details?airfoil=griffith30symsuction-il
There is basically no information there and (a quick cursory) web search ...
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What’s the horizontal and vertical tail airfoil and volume of 747-400? [closed]
What’s the horizontal tail volume coefficient of 747-400? What’s the vertical tail volume coefficient of 747-400? What’s the horizontal tail airfoil of 747-400? What’s the vertical tail airfoil of 747-...
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Never heard of this Aerofoil?
I just came across this aerofoil, 65-2xx?
I searched this but it doesn’t come up with anything like 65-200 for example but instead SG6051 which is the closest I could find to this?
Am I missing ...
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