Lift Equation Explained | Coefficient of Lift | Angle of Attack

Your airplane stays in the air when lift counteracts weight. But what factors cause lift to increase or decrease? The lift equation looks intimidating, but its just a way of showing how angle of attack, airspeed, and other factors combine to produce the lift we need to stay aloft.
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[@gamingtube0]

I’m student pilot in Iran , I wanna say thank you 🙏 for your training , all your information is simple and correct . I use all this information in flight every day and it’s very useful for me . Thanks a lot 👍🏻

[@stormbytes]

Outstanding presentation! Everything is so clear now. Thank you!

[@doobchec]

Thank you for breaking this equation down. Been flying for a long time and never heard a clear description until now. Appreciate your channel a lot! BTW Hope you received clearance through the DC SFRA in your sim video 😉.

[@AnnaRobert]

Thank you so much for this video! I had issues understanding this formula since yesterday, thanks to watching several videos, asking a few questions to my pilot bf + this video, I now understand the formula. Thanks again

[@14platinum]

The best word to describe professor Dan’s teaching method: exceptional!

[@cobra646]

another excellent video. Do you have one in the works exploring the relationship between CoG and stability/performance? That's always been a hard one for me to understand well.

[@flightinsight9111]

Hi! If you dig way back in the channel videos you should find one, I believe titled weight and balance. If it’s not there I’ll upload one down the road!

[@Faris_baasher]

Well done as usual, but i would loved if you’d go a little bit in depth explaining the Reynold’s number as you went through the Cl I know its not on the syllabus but it’s was still fun to understand it relationship with the AoA and so on Keep up the good work

[@flightinsight9111]

Thanks! Maybe an idea for a future vid

[@mikes5032]

Well done. One tiny little nitpick, though..... the variable 'v' is not velocity. Velocity is a vector variable (speed and direction), which is symbolized with a 'v→'. The variable 'v' is actually speed. It's a common misconception but speed and velocity are different (speed is purely magnitude, while velocity is magnitude and direction).

[@flightinsight9111]

I was waiting for this comment haha! I debated adding some explanation around velocity vs "vitesse" for V but decided to stick skip over it for simplicity

[@14platinum]

Velocity is a vector (I believe in this equation). Therefore, Lift is also a vector (vector analysis).

[@mikes5032]

@@flightinsight9111 I’m sure plenty of people are already scared away from math “with letters.” So trying to discuss the difference between scaler and vector calculations when it’s arguably not particularly important here is likely just counterproductive. It’s part of a larger equation which is vector-based but, in this context, it’s a scaler calculation. It’s still a perfectly valid explanation and a well-done video overall. Keep up the good work!

[@benjaminjohnson6476]

For simplicity sake this is grade! The only thing that would make it better but also more complex and longer would be going deepering in to bernoullis equation for pressure, and some even debate that the quanda effect plays a big part in lift generation. Basically one could easily make a 10 to 20 min video on just the Cl because of this.

[@14platinum]

This professor would easily simplify “rocket science “ (break it down and put it back together). Thanks Raouf PS: I do feel guilty not paying for this. I’ll figure it out

[@flightinsight9111]

Thanks!

[@marijnjc]

if you turn on developer mode in MSFS I think you can visualize the drag, lift, propwash etc

[@flightinsight9111]

Will give that a try

[@IanHorsford]

Bro you are truly a master at teaching. Seem less understanding of the material…..great job

[@flightinsight9111]

Thanks, Kerron. Nice compliment.

[@anzebicek2788]

literally had this lesson today in ground school

[@flightinsight9111]

Awesome. Hope it made sense!

[@anzebicek2788]

@@flightinsight9111 it cleared some things up, you do a great job explaining!

[@piquecuriosity]

Hey it is great content thanks for sharing but i'm confused about if we climb then we increase our aoa and it causes drag to increase also. So, we increase thrust too for compensating it. So, to the lift equation, when we climb, we increase the lift compared to its steady and level position but weight stayed same. So, why do they say lift is smaller and so load factor is when climbing? I know weight seperated of its component but in anyway it stayed same while lift is increased by both aoa and thrust. Anyone to explain?

[@Zalaniar]

I noticed you spoke a lot about deflecting air downward to produce lift during this lesson. What about Bernoulli's Principle, and the reduced pressure over the wing causing lift? Is that factored into this lift equation as well, or is that a separate equation?

[@flightinsight9111]

Bernoulli is a big part of this! The pressure differential helps the wing more effectively turn or deflect air downwards, which is why we stick to that general explanation in this video. But the lift equation certainly takes Bernoulli into account.

[@Zalaniar]

@@flightinsight9111 ah, I see, thank you for the reply :)

[@flemmingstelling8079]

Why is "P" / Rho equal to 1/2 only ?

[@user-bc5nm8nq1v]

Why gliders presents a lower AOA?

[@redscarecomixx]

Sounds like Bro Jogan

[@Virtualmix]

The pilot can extend the flaps to increase the surface of the wing and therefore increase the lift (and the drag).

[@flightinsight9111]

Bugged me too. The key is not movement up down, back or forth, but acceleration in any direction. When lift equals weight, the airplane isn't accelerating its rate of climb or descent. This is obvious if it remains at altitude, but is also true if it is in a constant rate climb or descent. With thrust and drag, it's the same thing. If it's remaining at a constant speed and not accelerating, it's in equilibrium.

[@Virtualmix]

@@flightinsight9111 Great explanation! It makes sense now when I think about it, thank you for your reply :)

[@Jbdeloffre]

I want to make sure i understand correctly: when you bring down flaps, you increase the surface area but also change slightly the camber of the wing, with the trailing edge being lower than originally. That increases the aoa, hence the CL, increasing the Lift. Which makes sense when you drop flaps, the airplane tends to balloon up a bit. To maintain the constant 2000lbs of lift and maintain constant altitude, the only thing left to change would be the velocity, which would have to go down, since flaps bring extra drag. Then you’re in equilibrium again. Am I on the right track? Great video and thank you!

[@vlatkopopovski2685]

The authors have two wrong scientific approaches: researching the creation of Lift force and Low pressure at upper side of the wing, relative to the ground surface and Earth. I explain the aerodynamic cavitation and existence of Lee side aerocavern, and creation of Aerodynamic force. Low pressure creates force normal to the cord (contact surface), and it name is "aerodynamic force" because is made from the air (aero) in motion (dynamic), or wind relative to the wing (object).

[@vlatkopopovski2685]

The force object receives is always normal to the contact surface and air pressure always acts normal to the surface of the body. This has long been well known, and I don't know why in flight theories and aerodynamics books this is (mostly) omitted.

[@jerm4336]

It’s Bernoulli's principle. Differential of air pressure, not pushing air down.

[@chrislacey6036]

He's explaining Newtons third law of motion. For every action there must be an equal and opposite reaction. The wing's angle of attack causes air to be deflected down causing a force up: creating lift. Yes, wings push air down to create lift.

[@flightinsight9111]

Hi Jer! Thanks for mentioning Bernoulli. Whether it's pressure differential thanks to the wing shape, or impact lift from relative wind, it helps keep things simple by characterizing all of these principles as causing air to be deflected downwards, keeping the wing aloft.

[@AviationDirection]

That is correct, Jer. If you push air down, your elevators wouldn't work on rotate nor your rudders left/right. Bernoulli "sucks" the tail down the same way it does for the wings or "pulls" the tail when using rudders.

[@XPLAlN]

@@AviationDirection Not sure what you are trying to say. In level flight the wing will always deflect air down and the elevator will either deflect air up or down depending on fwd or aft cg. During rotation, the elevator will always deflect air up. One can consider Bernoulli or pressure distribution but at the end of the day, if air is not deflected there is no force from the airfoil except zero lift drag.

[@AviationDirection]

@@XPLAlN 🤷🤦