Lift vs Coefficient of Lift. What's the difference?
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- เผยแพร่เมื่อ 5 ส.ค. 2024
- Coefficient of Lift is often misunderstood. We hope you will enjoy this simplified explanation of what it is and how it's determined.
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You are right. Very true
Fantastic, finally an aeronautical presentation that is thorough and professional.
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I have finished my ATPL exams. But occasionally I review concepts from time to time. Your graphics, combined with articulate delivery of information often makes me wonder why you are not in the ATPL game as a content provider. You would definitely have my thumbs up. Tone and speech delivery all to perfection and quality graphics as well.
I only commented to offer that piece. Keep up the great work no matter the direction you take. Many benefit from the quality material. Fair play. 👍
Congratulations on finishing your ATPL exams. Thank you so much for such positive feedback. Stay tuned for future developments ;)
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This is very clear and concise! Thank you! 😄
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One of the best explanations I have ever seen, if you guys made content for universities to explain aerosapce concepts for their courses, you would make a killing. There is no amount I wouldn't pay to learn my courses this way
Wow, thank you so much. Maybe I’ll do that one day:)
Even at my regional airline, sometimes channels like Boldmethod and University of North Dakota (UND)’s videos are referenced as training aids. Your work would be a shoe-in!
very good explanation
The perfect explaination!
I finally understand coefficient of lift. Thanks a lot. I'll stick around for more content
I love this channel so much, why can't all the groundschools use materials like these?
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Even though I am a lot younger for understanding you even made me understand
Absolutely great explanation. Thank you
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I’ve been describing this accurately but poorly to my students for a year. Thank you lol
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A very good explanation. Coeff of lift is a non dimensional parameter. Engineering requires extensive use of non dimensional parameters so as to obtain meaningful information and quantifying data.
Much appreciated.
Finally understood! Thanks !
Great!
Fantastic video!!! Very clear and concise!
Thank you!
Good explanation and presantation
What a great explanation!
Glad you liked it
When doing this CL test, will the aircraft body (the fuselage) also included in the test? Or the fuselage is constant but we control the cordline with flap and slat?
Awesome
Excellent video
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Wow, Thank you
You're welcome!
Which refrence books do you use ?
What "surface area" is used to calculate the Cl? I am assuming it would be different from the area used to calculate the Cd...
2:11 How measure LIFT? Because only i see lines. Surface of entire plane or just the surface wich are inside the tunel?
What if the density change? on the ground is 1080hPA and at 10km is 380hPA.
I need more details on it. Thank you.
I'm assuming wing shape is referring to its cross-section shape and not its profile(?)
Actually, lift coefficient also takes into account other effects not explicitly specified in the lift equation, including compressibility, viscous effects / shear stress effects etc ... basically all the extra detailed stuff people fight about in terms of "what is lift / how is lift created" (i.e. is it "bernoulli" ie dynamic pressure effects, what about coanda too etc). All the other little bits included in the equations of motion which we dont explicitly specify in the equation for lift are bundled up into Cl ...
Compressabily, viscosity and shear effects are predominant in drag effects.
👍
Wait, so in order to calculate lift you need the lift coefficient, but in order to calculate the lift coefficient, you need to know the lift? I'm trying to code the physics for wingsuiting in my game but I'm stumped by this, am I missing something obvious here?
CL is dimenshionless. It has no value. You don't exactly calculate it.
Hey Flight Club, do you plan on making a Coffin Corner video?
Great idea! Thank you.
Why aren't the actual dynamics addressed? Like the mass of air at the boundary layer flowing over the top of the wing, adhering to the surface via suction. Don't the 'laws' of orbiting bodies apply, since the air mass increases in velocity due to the 'slingshot effect' during it's partial orbit over the top?
Also, reaction lift is indeed occurring. If a constant stream of solid particles, (say small plastic air soft pellets, for example) were aimed at the front of a wing with a positive AOA, it's obvious that the wing would rise. And this is without the Coanda effect taking place.
So, both reaction lift resulting from deflection the bottom of the wing by the aggregate mass of the air, combined with the boundary layer mass of air flowing over the top and creating a thin, negative pressure area near the top surface of the wing to which it adheres; serve to maximize lift efficiency.
What occurs on the top wing surface is analagous to the effects of orbiting bodies and the "sling shot" effect used by space probes, only substituting vacuum adhesion for gravity. This is also aptly demonstrated with the "chain fountain" phenomenon. A partial orbit of a mass causing lift in the direction of a vector originating at the arc's center of radius and extending out, bisecting the arc at it's center.
This partial orbit of the air mass over the wing, tugging on the wing surface via suction, added to the upward push from the air mass deflecting off the bottom, share responsibilty for lifting the wing.
Both air and sea creatures make very efficient use of alternating these effects above and below the wing and tail (and to appreciable degree with sea creatures, their bodies). Rapidly alternating negative and positive pressures, exploiting the partial orbits of liquid mass around the curved surfaces of sea creatures, enable the Black Marlin for instance, to hit a reported 82mph.
Good Journeys All
P.S. Speaking of slingshot effects...
See - "Huge media blackout regarding supermoons" on the net
CL = AOA
ok