62 questions linked to/from What really allows airplanes to fly?
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### Can the lift generated by a helicopter be justified using Bernoulli theorem? [duplicate]

When the shaft of the helicopter rotates, it creates a low pressure. Because of the low pressure, the helicopter lifts. Is my understanding that this is just an application of Bernoulli's theorem?
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### How a faster air flow creates a lower air pressure on an airplane wing? [duplicate]

An airplane wing creates a faster air flow on the upper side and slower air flow on the lower side. Pressure of a gas and the speed of the gas molecules are directly related. If the speed of molecules ...
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1 vote
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### What's wrong with this argument that aerodynamic lift really does rely on Bernoulli? [duplicate]

There is a grade-school explanation of how a wing works that goes approximately like this (although I'm leaving out an erroneous bit): Because of the geometry of the way the wing meets the air, air ...
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1 vote
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### Do airplane wings use difference in pressure to generate lift or conservation of momentum? [duplicate]

I hope this is a physics topic. I thought it may be appropriate because of conservation of momentum. I was under the impression that lift in an airplane wing ( an airfoil ) was due to difference in ...
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### Equal Transit Time Fallacy [duplicate]

I learned, in grade school, that lift was generated via the particles on either side of the wing having to reach the other end at the same time. Looking back, that indeed has no physicality to it. So ...
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### I read a book saying bernoulli's flight equations didn't have as much impact on lift as most people think [duplicate]

I'm a computer scientist that likes to read about math and physics occasionally. A local author at a nearby aviation center brought bernoulli's flight equations into question. It was clear enough ...
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### How does the lift force of an airplane work? [duplicate]

At first I thought that the lift force of an airplane wing came from the buoyant force of the air. Thus we can calculate it's lift force using $$F_b={\rho}gV$$ However, that does not seem to be ...
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### Flow turning -- air flow [duplicate]

Why is the pressure on the inside of air flow curvature considered be low pressure and it is considered to be high pressure above? I read and seen videos that this is the case but I want to know why. ...
1 vote
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### Why is pressure over the wing lesser than the pressure on the bottom? [duplicate]

Why is the flow above the wing faster than the lower one? Most people say it's because the pressure above is lesser than the bottom one But for the pressure to be low... The velocity must be high.So ...
1 vote
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### How does this help an aeroplane to fly? [duplicate]

I read it somewhere on the internet that wings of an aeroplane are designed in such a way, that they increase the velocity of air above the wings and so pressure above the plane becomes less than the ...
1 vote
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### Why air above airplane's wing moves faster? [duplicate]

One explanation I read: Because of the wing's geometry, the "upper" side of the wing is longer, so the air has to travel faster: My wondering: Who said (and what was his/her explanation) that air ...
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1 vote
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### Newtonian mechanics vs. Pressure in Flight [duplicate]

Which one is better to describe lift of a plane wing: Newton's third law of motion: (The wing applies a force on air and the air applies an equal and opposite force on wing - which causes lift.) OR ...
1 vote
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### How is pressure reduced on the upper part of an aircrafts wing? [duplicate]

I have heard part of the explanation and that is that air on the top part of the aircrafts wing wants to move in a straight line, but the air is pulled down the slope or camber, but that's as far as I ...
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### Fluid Dynamics applied to Aircraft wings [duplicate]

On aircraft wings, the bottom is flat and the top is curved. I know this benefits the aircraft by producing lift, but I wish to understand how. I'm told it has something to do with how fluids behave.