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

[@sasasimic75]

Thanks to Peter Mentour for mentioning this channel. Subscribed.

[@davetime5234]

Hi Magnar, In a future video it would be interesting to see you explain lift in terms of the interconnectedness of the Navier-Stokes equation types. No need for solving in detail these simultaneous partial differential equations. It just feels like there has not yet been a strong enough voice for the explanation of lift by resorting to the simultaneous influence of these equation types: 1)Continuity of mass flow rate (rate of mass in must equal rate of mass out) 2)Conservation of energy (for the folks who don't like Bernoulli, this is unfortunately very foundational to lift generation) 3)Conservation of momentum (important to distinguish between energy and momentum, while emphasizing mass in = mass out; kinetic energy vs quantity of motion; one has magnitude only, the other both magnitude and direction; in one velocity is squared, the other it is not squared) I think providing such an explanation of lift, conceptually considering the interaction between the above essential rules, would fill a badly needed gap in the universe of explanations for lift.

[@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.

[@medn2295]

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

[@caladanian]

There is a problem with your microphone (high pitched sound). :/ But great content

[@Frank-ie8dh]

Great video, thank you so much for sharing

[@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"?

[@jonnyueland7790]

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

[@davetime5234]

I have to agree. The notion that viscosity is so necessary for the very existence of lift, has no universally agreed upon proof. Intuitively it's even somewhat contradictory: the gain or leverage that lift creates (an energy savings in forward flight reducing the demands of engine power from that required to maintain a hover), is presumably created by a phenomenon of energy loss?? I think a fair disclosure is that the role of viscosity in lift generation, while having a likely meaningful influence, is not at all universally agreed upon to be a prerequisite for the existence of lift. At 21:55 when Magnar summarizes the most important factors for lift, viscosity is once again absent. This suggests we (all of us) are unsure of how to exactly define the full impact of viscosity in relation to lift. (it makes lift less efficient I would assume; not being the essence of the efficiency of lift)

[@Bob-sk6xq]

Will this be in the test? Lol.

[@unclejoe8279]

Try inside out.

[@TheMaldivianTrios]

Hi