@SoloRenegade thanks for your comment. When making this video, I tried to condense as much information as possible in a 7 min format while keeping it in a way that is easily understandable by people without an engineering background. With that said, I’m pretty sure I know how winglets work as I have worked in the design of winglets in the past as well as consulted for the FAA on the effects of wake turbulence. Regarding the drag curves, they are obviously not to scale and are there solely for the purpose of explaining the change of drag with respect the lift coefficient. Lastly, induced drag was defined at 1:55 as the square of the lift coefficient divided by pi, the Oswald efficiency factor, and the aspect ratio. If you look at some other comments, I explained how a winglet increases the effective wingspan (and aspect ratio) of a wing.

@@lucasferrando-english4512 "induced drag was defined at 6:00 as the square of the lift coefficient divided by pi, the Oswald efficiency factor, and the aspect ratio." Sure, that's an equation for Induced Drag, which matches the equation out of "Airplane Performance Stability and Control" by Perkins & Hage (other than the additional Oswald factor), but it is not the definition of induced drag, nor does it explain what Induced Drag is nor any explanation of what reduces or increases it. "If you look at some other comments, I explained how a winglet increases the effective wingspan (and aspect ratio) of a wing." exactly, it's not in the video. nobody is going to read all of the comments. "I tried to condense as much information as possible in a 7 min format while keeping it in a way that is easily understandable by people without an engineering background." you didn't do a good job. I teach aerodynamics to all ages (both as an engineer and as a CFI), and believe me, you're way will only confuse people or leave them with more questions. I can teach the engineering of such things to middle school kids and have them walking away with an intuitive understanding of such topics. Your video doesn't achieve that. If I asked someone who knows nothing, to watch your video, and then teach/explain it back to me, they'd fail miserably. "With that said, I’m pretty sure I know how winglets work as I have worked in the design of winglets in the past as well as consulted for the FAA on the effects of wake turbulence." you don't sound confident about that. But if you truly did understand how winglets work, you should have been able to draw the basic diagram that easily and visually explains to people how they work. But you didn't. Any discussion of winglets that doesn't include such a diagram is not an effective at teaching how they work.

Thank you for your feedback.

I think this is completely inaccurate.

I watched your video and realized that you too know the winglets are just a marketing scam. I thank you for your video and your reply. As a professional please explain scientifically and logically your reason(s) to invalidate my findings.@@lucasferrando-english4512

Thank you for the nice words, Triumph. The diagrams take some time to make but they make a big difference I think.

It’s never too late for that.

@@lucasferrando-english4512 Very true. Thank you !

You are welcome!

Thank you for the nice words, @afsaralim7

Thank you!

NelksTV, I’m glad you enjoyed it. Thanks for the support.

Thank you for the support, Peter

Thank you for the nice words

Thank you for the nice words, Tayeb

Winglets can indeed produce thrust but their main purpose is to increase the effective wingspan and aspect ratio of the wing, thus reducing induce drag.

Hector, thank you very much for the nice words. I'll start uploading more videos soon.

Hi Curva. Thank you for your comment. I tried to get to the point of the aerodynamics of diffusers in the most clear and understandable way. I might have missed some regulation details (as these are constantly changing and are difficult to keep up with). But I think the point gets across.

Thank you very much! :)

Parasite drag is produced by VERTICAL surfaces and Induced drag is created by HORIZONTAL surfaces, for example when the Flaps are at 0 degrees they produce Max Induced drag and Min Parasite drag, at 90 degrees Min Induced and Max Parasite drag and at 45 degrees in the middle of both, for a flap with no thickness. The fact that Lift and drag are both proportional to airspeed squared, means airspeed affects a 2 Dimensional surface, geometrically a Square plane. Wing Vortices are not the cause of Induced Drag but it is just a Visible Effect of it. I have developed a hypothesis to explain physical, atomic and subatomic (gravitational movements, Center of Gravity and Mass), however I need to validate my V & H surfaces theory first. It seems that Winglets reduce Lift and increase Drag, I also believe in turbance Winglets impose additional stress to wings and all other moving parts inside the wings like rods, joints and moving surfaces. Wingtips also decrease the stability and controllability in turbulent air. Please let me know what you think, thanks.

Thanks Dean!

Depends...if I make more money from it, of course! I think it's a use case scenario. Definitely helpful for business...

The space shuttle was beautiful and I'm fond of it considering my father's involvement. I think the capsule approach paired with reusable first stages is an elegant and proven design, even outside of SpaceX. I'm interested to see if Starship will have a meaningful impact.

I agree with you Dean. The space shuttle definitely had a very iconic design. And although it was also reusable, the logistic and economical advantages of the Dragon 2, the Falcon 9 (and hopefully the Starship) are making space more reachable. The future of space exploration looks bright!

Thanks a lot!