Aircraft Flying Upside Down! Is This Real?! (2024) Lift Explained | Fly with Magnar

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I'm about to reveal the mind-blowing secret behind how planes can defy gravity and soar upside down!
Have you ever wondered how airplanes can fly upside down? Join Magnar in this exciting episode as he explains the science behind lift and debunks common myths about flying inverted. Get ready to soar through the skies and uncover the secrets of aerodynamics with me.
Video Highlights:
-Understanding Lift: Explore the science behind lift, including the role of wing curvature and the equal transit time hypothesis.
-Flying Upside Down: Learn why airplanes can defy common beliefs about lift and fly upside down.
-Myth Busting: Challenge the equal transit time hypothesis commonly taught in science classes and aviation training.
-Bernoulli vs. Newton: Delve into how Bernoulli's theorem and Newton's third law of motion both explain lift from different perspectives.
-Practical Insights: Understand how engineers use the Navier-Stokes equations to predict lift and why fluid dynamics is key.
-Aircraft Procedures: Learn about the stall warning system and its importance in detecting imminent stalls.
-Graph Analysis: View a detailed graph illustrating the relationship between angle of attack and lift coefficient for a specific aircraft model.
Description Content:
Maybe you do not care about how a wing creates lift, but wouldn’t it be nice to be able to give the correct answer when a friend is asking?
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According to a common belief, lift is created because the upper surface of a wing is more curved than the underside. When two air parcels are split by the wing, the parcel moving over the wing will have to travel a longer distance than the parcel under the wing before they meet behind the wing. This forces the parcel over the wing to move faster than the other. And, according to Bernoulli’s equation, an increase in velocity results in a reduction of static air pressure, which is lift. This is called the equal transit hypothesis. If this is correct, then how can an airplane fly upside down? This is what this video is about.
First, we must understand how a wing creates lift. Some say nobody knows for sure because it is too complicated. Some say it is Bernoulli. Some say it is Newton’s 3rd law of motion. Some say it is the Navier-Stokes equations. An engineer at Boeing once said: “It’s easy to explain how a rocket works, but explaining how a wing works takes a rocket scientist.” To kill one myth right away: Lift is very well understood by the engineers. They use the Navier-Stokes equations to predict how an aircraft produces lift. But only those with a degree in fluid dynamics will understand those equations.
What we need is an easy-to-understand explanation that kids, and pilots can understand, without getting the facts wrong. The two most common explanations are “pressure difference,” promoted by the Bernoulli supporters, and “Newton’s third law,” promoted by the Newton supporters.
When it comes to lift, it is not Bernoulli or Newton. They complement each other. Bernoulli is about flow speed, surface pressure, and conservation of energy. Newton is about force, flow direction, and conservation of momentum. We are looking at the same thing, but from a different point of view.
Links:
- Lift formula: • The lift formula expla...
- Spitfire video: • Biltema Airshow: Musta...
Special Thanks:
- Knut Olav Myhre: Pitts Special video
- Knut Åshammer: Spitfire video
J

[@sasasimic75]

Thanks to Peter Mentour for mentioning this channel. Subscribed.

[@Frank-ie8dh]

Great video, thank you so much for sharing

[@medn2295]

Thank you for your videos. Very nice explanations. Avionics engineer by profession here.

[@jonnyueland7790]

At 19:52 you say viscosity keeps air over the wing. But its actualy the air pressure that is filling the void.

[@axelBr1]

A great explanation. I grew up being told that lift was due to the equal transit time of the air above and below the wing, and never questioned the obvious, 1) why do the air particles above and below the wing want to keep together, and 2) how can an aeroplane fly upside down.

[@Bob-sk6xq]

Will this be in the test? Lol.

[@737787]

Good stuff thank you.
What do you think of the use of this “lift” word? Wing Lift. Not the verb. A noun. Lift. Usually associated with something that causes lifting or being lifted. Up.
Using something……Hands, ropes or an elevator(lift) etc. wings in climbing flight.
When descending the aircraft is not being lifted but is falling less if you like.
It is a controlled drop?
At the top of a loop there is no lifting anymore but the wing is still flying producing force towards the center of the loop, downwards.
What if we used the term WING FORCE” to describe wing lift instead? So in a steep turn say 60 degrees the wing is producing WING FORCE 90 degrees to the wing but results in vertical force (lift) and horizontal force.

[@FlywithMagnar]

Thank you for the idea. I think the term "lift" in aerodynamics is so widely accepted that it would be impractical to change it. In the English language, there are several words with double meaning, for example bat, duck, and flat, to mention a few. I think we can live with that.

[@adb012]

Semantics aside, aerodynamic lift has a very specific definition (and it is not the force that opposes weight). It is the component of the total aerodynamic force that is perpendicular to the airspeed vector (or perpendicular to the freestream which is the same). The other component of the total aerodynamic force, the one that is parallel to the airspeed vector, is drag. And a wing produces both so "wing force" for "lift" is not really a good idea. It should be "wing force perpendicular to the airspeed vector", but that's the definition so let's give it a name for short: How about "lift"?

[@TheMaldivianTrios]

Hi

[@unclejoe8279]

Try inside out.

This is mostly nonsense. My outstretched hand is not an airfoil but it will feel a lifting force when poked outside the open window in my automobile with the hand slightly tilted upward into the air stream. This ram force is what causes my hand to lift and is what keeps an airplane in the air. Anything beyond that simple effect is merely refinements to maximize the lift.

[@thomasochsner5002]

What Magnar talked about is exacrly why you feel a lifting force on your hand.