All Questions
48
questions
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1
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41
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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 ...
- 1
0
votes
1
answer
59
views
Does a helicopter fly because air is forced downwards, or because each rotor acts as an aerofoil to generate lift? [duplicate]
The answer may be a combination of the two.
Does a helicopter fly because air is caught by the rotor and thrown downwards, which causes an equal reaction in the opposite direction and 'throws' the ...
- 101
0
votes
2
answers
63
views
Do airfoils need narrowing tails to create a forward force?
All airfoils I have seen become narrow towards the trailing edge.
Is it still possible to create a forward vector force if the shape becomes wider again after a narrow middle section?
I read that the ...
- 31
0
votes
1
answer
32
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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
1
vote
1
answer
223
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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 ...
10
votes
5
answers
3k
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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
-1
votes
1
answer
97
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What is the main role of the Angle of Attack of an airplane, as in mainstream explanation of lift? [duplicate]
The question is conceptual and simple, it needs no more information to answer it. And I wish not to influence the answerer.
- 5
1
vote
1
answer
2k
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Convert BLDC motor thrust in grams ($\rm g$) to Newton ($\rm N$)
I am making a quadcopter with takeoff weight equal to 2 Kg. Using thrust to weight ratio of 3:1 the required thrust per motor is 1500g. (No experimental thrust has been obtained for thrust.)
Now I am ...
- 13
6
votes
1
answer
261
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Is the downforce of rain on airplanes negligible?
Is the downward pressure exerted by raindrops in even a strong storm on a lightweight aircraft negligible?
Someone better informed may likely improve the following reasoning, cobbled together from ...
-1
votes
1
answer
104
views
The lift of an airplane is similar to that of a balloon. It uses the density difference of air, right?
The lift of an airplane is similar to that of a balloon. It uses the density difference of air, right? The air density on the top surface of the balloon is low and the air pressure is small. The air ...
- 2,040
0
votes
2
answers
564
views
What direction is aerodynamic lift in?
So I was researching about aerodynamic lift, in all the research I read it says lift is perpendicular to the flow direction. But in 3d space there isn't only one perpendicular vector to a given vector....
- 11
1
vote
2
answers
1k
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What is the bare minimum of air density you need to fly a helicopter?
How high will a helicopter be able to fly before the propellers have not enough air particles to achieve lift?
What is the minimum air density needed to achieve flight with a helicopter?
Could you ...
- 121
2
votes
1
answer
88
views
Lift on Airplane wing
Why commercial airplanes use long, slender wings? Isn't it to maximize lift, we make the plane's wings as wide as possible?
- 47
-5
votes
4
answers
328
views
Can we make a drone fly on the Moon by using cylinders with compressed air (or cold helium)? [closed]
Suppose we want to make a drone fly on the Moon (the gravity on the Moon is 1/6 of that on Earth), only by making use of its rotors and air.
The drone is as light as possible ($m_{min}(kg)$, has ...
-2
votes
1
answer
109
views
Wind tunnel experiment that measures lift (not the lift coefficient)?
Does anyone know of a wind tunnel experiment on a wing or airplane that measures the absolute amount of lift (not the lift coefficient); and demonstrates conclusively that the lift generate by a wing ...
- 175