All Questions
Tagged with aircraft fluid-dynamics
96
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Calculating aerodynamic forces on a random object
I've set out to designing a game that would let the user design a vehicle/plane and then fly it around and I'm interested in what would be the best way to go about the physics aspect of it.
The 3d ...
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Is there a minimum power required to keep a drone or helicopter in the air - and if so, what is it? [duplicate]
Assuming a mass M and horizontal projection of area A for a hovering object (no wind) like a drone or helicopter, what's the minimum power required to keep it hovering? Let's assume no ground effects....
- 228
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Why is accelerating more air slower more efficient than less air faster?
According to this answer on Aviation Stack Exchange, when propelling an airplane it is more efficient to accelerate a bigger amount of air a little than to accelerate a small amount of air a lot. Why ...
- 275
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Lift generated by airfoil and why does a flow with a positive angle of attack around a flat plate curve upwards instead of downwards?
I've recently been reading about what really causes lift on an airfoil and the article linked mentions that even a symmetric airfoil or even a flat plate generates lift as long as the angle of attack ...
- 531
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Is the wing drag of induced drag + 2d drag at 0lift still accurate for cambered airfoils?
I have some work at uni that requires some aerofoil analysis to create a wing, but from the polar plots its clear that the cambered aeros have lower total 2d viscous drag (from xfoil) at the cl its ...
- 113
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Why doesn't a Hang-glider Stop Moving Forward, Stall and Fall?
Why doesn't a hang-glider stop moving forward (because of air resistance), stall and fall?
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67
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What's the reason an airplane turning 180° from strong headwinds causing it to have no ground speed does not stall?
I saw a video of a small propeller plane hovering over the ground due to strong headwinds but then turns 180 degrees and flys away. I was trying to figure out if the plane shouldn't be stalling ...
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Airflow on wing, simple force analysis
(Look at the picture)
Let's assume there is an horizontal plane impacted by diagonal airflow with components from coming downwards and ahead. If we say that the airflow is fully deviated by the ...
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Buoyant Air Kinetic Energy in a Lagrangian Approach to Derive Airship Equation of Motion
I am currently working on deriving airship equations of motion, in a fluid in motion (unsteady and non-uniform wind). The article cited in most sources is Equations of Motion of a Vehicle in a Moving ...
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3
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In an aeroplane's jet engine, where is the forward force applied to the mass of the plane?
In a standard jet engine on a standard aeroplane, is the majority of forward force received by the aeroplane (which causes it to be propelled forwards) applied on the compressor blades, the rotor ...
- 181
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How does the newton's third law generate enough lift to make the airplanes fly? [closed]
How does the newton's 3rd law generate enough reaction so as to make the airplanes fly to great heights? The airplanes push air downwards but really is that enough to make the airplanes fly to great ...
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Is it possible to statically generate lift with the difference in pressure like wings?
If I understood it correctly, the shape of the wings and/or propellers generates lift/thrust with the difference in pressure in both sides of the wings/propellers; where the lower side has higher ...
- 277
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2
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64
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Why are the blades of a pedestal fan so different from the blades on an aircraft propeller?
Both fans and propellers move a quantity of air. In the former, that is the end goal. In the latter, this movement of air creates a force in the direction opposite to the airflow. So, why are the ...
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Why are the vectors for the pressure above the airfoil bigger when pressure is actually lower?
This image displays "Pressure vectors and flow over cambered section". As far as I understood fluid dynamics, the static pressure is lower in areas where the fluid flows at a higher speed. ...
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Energy balance in fixed wing flight, action/reaction
When an airplane is in flight the engine of the plane overcomes drag until the plane is moving forward fast enough to balance drag. In a stable configuration the air moving over the wings creates lift ...
