Winglets - How Do They Work? (Feat. Wendover Productions)

[@benbrelje4403]

Aerospace engineering PhD student here. Even with multiple classes in aerodynamics, developing intuition for lift distributions and wingtip devices is really difficult. However, focusing on reducing wingtip vortices like the video does is almost certainly not the best way to think about how winglets work. Vorticity is generated along the entire span of the wing in a continuous distribution, not just at the wingtip (ref. Prandtl's lifting line theory). It only rolls up downstream. It is the distribution of vorticity which creates downwash on the entire wing (induced drag) and this is why the entire lift distribution affects induced drag. An ideal vertical winglet moves some of the vorticity production away from the main axis of the wing, which reduces the strength of the downwash where the lift is being generated. By far the best explanation for this I have found is in Chapter 8 of Boeing aerodynamicist Doug McLean's book, "Understanding Aerodynamics: Arguing from the Real Physics". The big takeaway from McLean is that you can't think of the wingtip device as a bolt-on accessory; you have to consider its impact on the lift distribution of the entire wing (and this is really hard to think about). He also shows why devices which attempt to "straighten out" the wingtip vortex do not work in practice. The video addresses raked wingtips vs winglets. McLean's book has a chart which shows that vertical winglets are more efficient than a planar wing for a given span. But this is only decisive for an airplane that is constrained by the width of an airport gate. Deciding whether to use a winglet or tip extension depends on the wetted area of the device (friction drag), the effect on the bending moment of the wing (structural weight), the weight of the device itself, and the induced drag benefit among other factors. There's really no right answer - you have to crunch the numbers in each case.

[@aubriana6390]

As an aspiring aeronautical engineer this comment gave a great perspective. Thank you!

[@almondpotato9483]

As a normal person who has learned a great deal from your comment, I thank you. And, realize that I am one of the only people to comment because your comment has some very advanced physics in it.

[@benjaminj3934]

Thank you for your comment! I am an aerospace engineering student myself, and though I passed aerodynamics 1 and 2 successfully some phenomenons still leave me thinking. :) Funny thing you mentioned the book by McLean, because just earlier I watched his video "Common Misconceptions in Aerodynamics" and also left a comment concerning an aspect I couldn't grasp yet. Maybe if you have the time you can check it out and give me your explanation. Anyway, I think I have a new book to read ;)

[@boeingairbus5449]

Is there any way to contact you sir..... It was for an academic purpose😊

[@twofingermobilegod3847]

I am a teenager right now striving to be an aeronautical engineer how should I start my career or what do i do im not really sure what to do im just learning as much i can about planes

[@blitsonray813]

It's funny how most things that are useful are also very beautiful

[@OmDahake]

Our brains evolved to identify useful things as beautiful and dangerous things as ugly to prevent us from going there

[@pilothaha]

@@OmDahake yeah I can see that but I do think winglets have a beautiful and elegant curve

[@Mahlak_Mriuani_Anatman]

Nothing is beautiful nothing is ugly

[@VetusBarbatus]

Yes, like a can opener.

[@AakashKalaria]

I am a simple man, I see a video starting with beautiful A340 Taking off, I like it!

[@RealEngineering]

+Aakash Kalaria My happy place is sitting at a bar with a nice view of a runway. I am also a simple man!

[@AakashKalaria]

+Real Engineering if I could do that it would be a perfect day! Cheers!

[@RealEngineering]

+Mind Patrick well I have a masters in Aeronautical Engineering, that may have something to do with it haha

[@liamgibson4018]

+Real Engineering I found your channel tonight and I really like it. It's kinda funny, this is what happened; I was looking at a picture of a old TAA aircraft my grandma had, and she was laughing at the windows of it, and then I went into KZbin and your video popped up in my recommendations "Why are Plane Windows Round", and from there on, I have been loving your videos in the past 30 minutes. Keep the good videos up!

[@jviation737]

I agree

[@tonyerspamer8742]

2:25 did I just see an airliner go vertical from takeoff??

[@TalesOfWar]

Not quite, perspective can be deceiving lol. It is rather steep though. You'd be amazed just how agile airliners can be, but for obvious reasons they're rarely ever flown like this lol.

[@crackedemerald4930]

+TalesOfWar those reasons being people smacking their head on the ceiling and dieing, whitch is more common than you think. They also need to be agile, when shit gets real

[@AlvinDarmawan05]

Tony Erspamer Air show?

[@Cash4gold84]

Alvin Darmawan I think it was a promotional video.

[@nathangreenall7929]

Tony Erspamer that was an airshow when the 787-9 was just being released

[@looneyflight]

omg, that 87 take off :P so perty

[@TheHuesSciTech]

Yes you can. The takeoff in this video looks much more impressive than it really is because of foreshortening from using an extremely long (i.e. zoomed) lens.

[@uyhu24]

I love me some high performance take-offs

[@dalewong7643]

It's in an air show and it's very light, which is how it can do that.

[@RAVIOLIdS]

looneyflight is a take off test

[@c.e.1065]

As an engineer I love this channel. Very well educated and describes the topics using actual engineering terms, theory, and examples. Well done sir

[@hindugoat2302]

wait... imagine if that winglet had an even smaller winglet on it! the efficiency would be insane!

[@موسى_7]

And if that repeated until we get a winglet a few molecules in size!

[@aslamnurfikri7640]

737 MAX and some NG has double winglets that angles upwards and downwards

[@hindugoat2302]

@@aslamnurfikri7640 that usually means your gay

[@alsa4real]

@@aslamnurfikri7640 f1

[@victorsvidss]

it looked like it was gonna do a backflip at 2:33 omg

[@laxpors]

I think I'm going to like this channel!

[@RealEngineering]

Well that is a big compliment. Glad you like the channel. Plenty more to come!

[@mr_nice.]

I'm a nut for jet engines, so Real Engineering.....you know what to do!

[@BK01012]

0:00 swiss!

[@SephirothRyu]

@@RealEngineering So... what if you had forward-swept "winglets?"

[@Lucas-wj8kl]

I like how he got inspiration from birds. It goes to show that nature is indeed low-key advanced than us in terms of real world mechanics.

[@DarkWolf12278]

People have learned a lot by observing birds, but they haven't learned who taught birds how to raise their wingtips when gliding, even though we all know that birds and other animals don't have reasoning. Go deeper and recognize the Allah who created you and this world, so that you may be successful in the eternal life after death.

[@Lucas-wj8kl]

@@DarkWolf12278 God is real, yes. But I think there are so many wrong things in muslim teachings. You should join christianity and stop getting fooled by muslims.

[@YouLoveMrFriendly]

Air pressure changes are only part of the lift phenomenon. Downwash is very important, as well, and you can easily see its effects with rotary wings while the aircraft hovers just above grass or dust.

[@sarada90]

I love airplanes and now I love the videos on this channel. Cheers mate. Your hard work is duly appreciated.

[@anaxim1]

I enjoy the casual language combined with the informative and educational content.

[@schwarzarne]

Sadly this is only the often reapeted superficial inaccurate (or even wrong) explanation. Actually the strength of the vortices that form behind the wings is directly proportional to the lift produces by the wings, and you can't reduce that without reducing the weight of the plane. As far as I know, the only thing winglets are doing is to shift the vortex out and back to prevent the downdraft part of the vortex hitting the wing and thus reducing induced drag, or something like that. Induced drag is nothing else as the wing flying in its self-induced (hence the name induced drag) downdraft.

[@valuedhumanoid6574]

Between you and Wendover, I get more stuff crammed in my head than the rest of KZbin combined.

[@RMoribayashi]

You could often see dust or fog highlight the wing tip vortices on the Space Shuttle just as it touched down. It was especially beautiful during night landings, the runway lights back-lighting the vortices as they spiraled behind the Shuttle.

[@hikoseijuro922]

look i've been in youtube in 6 years you guys are so so good u will never be appreciated well by ppl thats how high u fly bro

[@wbeaty]

None of the explanations from various sources mention the problem of tip-vortex migration. When at certain values of air speed and attack, the tip-vortex moves away from the wing tip and quite far inwards. In that case the section of the wing extending out past the vortex is producing a down-force and wasted fuel. By forcing the tip-vortex to remain at the wingtip, this loss-mechanism is removed. I'd like to hear about the relative contributions of reducing the KE in the center of the vortical pattern, versus permanently moving the vortex-location out to the wing's tip.

[@Brickcellent]

This channel seems to be more suited for the uninformed, general audience, so I don't think the uploaders goal is to discuss detailed variations of aeronautical engineering.

[@wbeaty]

As I understand it, it's not a "detail," it's the whole effect! I.e. the typical explanation is simply wrong, and the main function of winglets is to stabilize the vortex location (keep it out at the wing tip.)

[@tylerfb1]

The only time I would think that a wingtip vortex would migrate root-wards significantly would be at critical AOA or higher. Which is outside the operating envelope. In fact, I've never heard of this happening to the degree that I picture you describing it, and I don't know how winglets would prevent it from happening in that case. This isn't to be: so says me; but rather, this is my experience, I'm interested in this phenomenon you describe, since I've never heard of it. At least, not what I'm picturing in my mind. :)

[@tylerfb1]

Yes lift distribution is somewhat important, and winglets modify that, but that is not their goal, nor how they achieve fuel efficiency. Three dimensional airflow exists on wings that are creating lift regardless of the type. The high pressure air below the wing tries to flow to the low pressure air on the top as the video mentioned, and this creates airflow from the root of the wing toward the tip on the bottom of the wing, and the opposite way on the top. Wingtip vortices are the result of these two span-wise airflows interacting with each other. Winglets take advantage of span-wise flow by putting an airfoil in that flow that creates lift in the direction of travel of the airplane. So instead of creating lift that directs up, it creates lift that is actually mostly sideways, but a small component, about 8-10%, is directed forward. Hence, energy in airflow that was going to waste, is now being put to work as thrust for the airplane. And a side benefit is that wing tip vortex energy is reduced, and wing lift distribution is (mostly) beneficially modified. The size and angle that a winglet is mounted are absolutely critical to their efficiency, and if the angle is off even a little bit, or they are too big, they become huge sources of drag.

[@DarkWolf12278]

People have learned a lot by observing birds, but they haven't learned who taught birds how to raise their wingtips when gliding, even though we all know that birds and other animals don't have reasoning. Go deeper and recognize the Allah who created you and this world, so that you may be successful in the eternal life after death.

[@tylerfb1]

@@DarkWolf12278 I agree! But the Creator’s name is Yahweh, and His Begotten is Jesus the Christ.

[@DarkWolf12278]

​@@tylerfb1you are on a very big mistake, may Allah S.w.t guide you..

[@kulturamoto3302]

I love it when you guys (Wendover Productions) collab.

[@ChuaShaoCong]

Hey Real Engineering, I have an engineering question that is not related to the video, but I hope you can help: Why are there so many different types of wings, especially on fighter aircrafts. Shouldn't there be a standard wing whose shape is optimised for a particular task, be it speed, manoeuvrability, efficiency etc? If you look at the YF-23, which is supposed to perform the exact same task as the F-22 Raptor, they both have very different wing designs. Is one really better than the other? I have been puzzled by this question or a long time and I can't seem to find the answer to my question anywhere. Do you know where I can learn more about wing shapes and how they affect the performance of an aircraft? (Or perhaps could you make a video on wing shapes? :)) Anyway, thanks for taking the time to read through all the comments. I hope you can help answer my burning questions :) Your videos are educational and informative, not to mention awesome. I have watched every single one of them!

[@RealEngineering]

That is a very loaded question. We discover new methods of manufacturing, we discover new materials, we learn more about aerodynamics, engines and control surfaces shift position, radar evasion may be a higher concern. Speed and cruising altitude requirements change. There are SO many variables that effect wing shape. I'll be doing loads more videos on wing design in the future. Just keep watching to learn more!

[@ChuaShaoCong]

Alright :) I'm looking forward to them as I am really interested in the physics of these wings. and I hope you can analyse how they effects the compromises made for different requirements in depth. But I am still particularly curious about the example that I quoted on the F22 and the YF-23, they are created at around the same time, they are meant to perform the same tasks. But I do not understand why the YF23 chose to have such a different wing from the F22? Like what made them chose to have that kind of wing etc Anyway, thanks for taking the time to answer our questions! I'm looking forward to your videos

[@superskullmaster]

If you break off your example from those fighter aircraft and choose for example a 747 and an A380. The 747 wing was designed at the time with alot of wing sweep. One reason for this is to delay the onset of shockwaves just like all other swept wings before them. Well that wing sweep gives the 747 a very high cruise speed but at the same time highly swept wings do not work well at low speeds. To solve this Boeing used triple slotted flaps on the 747 which allowed it to takeoff and land at similar speeds to planes much lighter than it. Fast forward to the A380. Besides the fact that the engines are much more efficient, Airbus went with a high aspect ratio wing (think more like a glider wing, long and narrow chord on average). This allows the A380 to use engines with less thrust while cruising much more efficiently. The cruise speed is the same for both but the price per passenger per mile are worlds apart. So back to the F-22 vs F-23. They both may have similar cruise speeds, range, and a list of other things the USAF wanted but I think the F-22 came out of top because it was much more conventional (basically a smooth F-15) and has a tighter turning radius due to a larger wetted area and vectored thrust. This is part of the reason the F-35 won also and not the F-32(highly unconventional, unsafe inlet, could not even transition from forward flight to hover without ground work ect). So there is an area where the F-22 and the F-23 have very similar performance but there are areas where one is superior over the other. I believe the F-23 was faster in part due to its longer more streamlined shape but this also comes at a cost of turning performance. That's my 2 cents but i'm just an A&P mechanic who has been studying aviation for the last 14 years.

[@Dwight511]

F-22A reflects less radar and is more stealthier than the YF-23. YF-23 canopy has blindspots which is not ideal for dogfighting, produces a lot more heat signature unlike the F-22 which has been tested against IR missile locks. Not as aerodynamic as the F-22 in fuselage and the radar cone is also too small and many other things. YF-23 was is an obvious utter failure compared to F-22 to be honest.

[@wendydashkewicz7396]

ChuaShaoCong a

[@PDBreske]

When winglets were first starting to show up on planes, I read that the addition of a three-foot-tall winglet wasn't as beneficial as simply adding three feet more to the wing's length, but the winglets were preferred because they would allow the aircraft to more easily fit into standard airport terminals. Do you know if this is true?

[@RealEngineering]

Yeap, that's true! Not sure on the "as beneficial" part, but it does have similar effects.

[@PDBreske]

Thanks for the reply. I watched just three of your videos and subscribed. Love this stuff.

[@MegaGouch]

Adding more length to the wing would just allow the wing to produce more lift, winglets are not added to increase lift but to decrease drag from wingtip vortices. The longer wing would make the vortices worse, and have an increase in induced drag, so would be overall much worse than winglets.

[@PDBreske]

But wouldn't a given increase in lift result in a reduction of drag due to the reduced thrust and angle of attack required to maintain a given altitude and airspeed? I'm not saying it would give the same result as the winglets, but it doesn't seem like the extra wingspan would be as detrimental as you suggest.

[@MegaGouch]

+Phillip Breske it would also increase form and skin drag, itd be easier to design a winglet to retrofit to a wing that a wing extension. If you are referring to a new designed wing you may be right, and I think thats kind of what they have done with raked wingtips.

[@bobversyp2123]

2:28 i hope that was a test flight xD

[@alamp7640]

It has to be...right?

[@CharlieND]

It was.

[@bobversyp2123]

Ziggmanster weeral een nieuwe channel?

[@jclarida7576]

It was for a show to feature its capabilities.

[@srirambalraj8]

Bob Versyp it was to show its ability of higher climb rate. The aircraft is b777x which has higher climb rate next to concorde, tu144 on passenger plane category.

[@doctorpurplestorm]

I am actually so happy that I found this channel

[@thax6306]

Keep going. I know it’s tough and it seems like a long road but remember the goal

[@Ahmad.....................]

I remember when i used to make paper planes when i was yound, i once decided to try smth new. I added winglets. Adding winglets to them made them fly longer and not nose dive once i threw it Yeah im officially an engineer

[@dewiz9596]

Nice to see the cross-pollination between Real Engineering and Wendover Productions. Keep up the great work, guys!

[@DarkWolf12278]

People have learned a lot by observing birds, but they haven't learned who taught birds how to raise their wingtips when gliding, even though we all know that birds and other animals don't have reasoning. Go deeper and recognize the Allah who created you and this world, so that you may be successful in the eternal life after death.

[@danielliu8802]

I was kind of expecting you to expand more on how the winglet reduce the down wash and the tip vortex strength, and maybe mention a little bit more about the penalty of having a winglet. But you are already giving a lot, I can't ask for more.

[@murtsman1]

Just to correct one small thing in this video. Wings do not provide lift by creating a pressure difference, that's a very common misconception. They actually create lift because it turns the flow of air. www.grc.nasa.gov/www/k-12/airplane/wrong1.html www.grc.nasa.gov/www/k-12/airplane/right2.html

[@tylerfb1]

Its both. Neither Newton's third law nor Bernoulli's principle can account for all of the lift force created by a wing. But it is indeed Bernoulli's principle that enables an airfoil to produce the lift that it does, at the angles of attack that it does, compared to a flat plate.

[@jonaslinnros8616]

Yeah it is both however the newtonian part is the one that produces the majority of lift.

[@tylerfb1]

+Jonas Linnros truth.

[@monky123344]

So far in each of his videos, there are principles that he states as facts that are either incorrect, or a very small part of the whole part, and he never says anything to inform the viewers of it and i think it's very misleading...

[@jonaslinnros8616]

Yeah for a guy who calls his channel real engineering, he really dosen't know much about engineering.

[@Metamon7]

I just found your channel, through the airline cost video, and I find your videos very informative and entertaining to watch. I'd love to see a video of how gliders generate lift without an engine :)

[@Rtk0211]

Hey man! I've found your videos about an hour ago and already watched them all (rewatched some too!). Content is phenomenal and very informative, I hope you keep pumping out videos! They're a wonderful refresher of my University days. :)

[@2136enrique]

That dream liner is pretty dope

[@MuhammadQasim-lp2ek]

Dear KZbinr, (real engineering) your videos are great. it help's understanding some the most annoying questions. I really appreciate your work of making these such videos. keep making these videos. Please, make some more videos on airplanes. Thanks

[@arfyness]

You, Sir, have earned my subscription in the first FIVE SECONDS of this video. Well done. Very well done indeed!

[@guytero8812]

😱 Ahhh! I was enjoying that and then it ended so abruptly.

[@fightersvirtue1764]

So simple and yet so complex.

[@jarekjellison817]

You are a little wrong about the raked wingtip design. It actually first appeared on the Boeing 767-400ER. Just thought you should know that. Great video, by the way!

[@Confuciousay2]

Most airplanes adjust the lift distribution by varying the incidence of the wing from root to tip. So even a rectangular wing can have an elliptical lift distribution. This is also done to get better stall characteristics by having the inboard part of the wing stall before the outboard part where the ailerons are providing lateral control.

[@vrushagiraval2154]

It's such a amezing video and I think it will help a lot for student.if I miss my any lectures than I can batter and easily learn here..thank you

[@RoParky]

Thanks, you answered the question I had in my mind for years.

[@bluetannery1527]

Love these videos so much. Where did you learn engineering?

[@ankurbhattacharjee2214]

I guess winglets are also put so as to decrease the fluttering of wings. If possible please clarify. Thanks in advance Real Engineering. Awesome channel!

[@AmbientMorality]

Winglets generally excite flutter modes

[@jtveg]

Winglets as well as reducing drag on the plane creating the vortex, also allows closer distances between following aircraft on landing approaches and takeoffs by reducing the amount of turbulence caused by vortices. Large aircraft that usually create large amounts of wake turbulence up to 2km behind them usually the word "heavy" in their call sign to denote this danger to following aircraft especially to small light planes. eg "United 451 heavy"

[@ekkehardg.9851]

Please keep in mind that on an elliptical wing a stall will happen on the entire wing at the same time. That's why they are not used very often ;)

[@RealEngineering]

Yeah one of the quarks of the spitfire was that the wings fluttered just before stalling so atleast it gave the pilots some warning

[@ekkehardg.9851]

Only because they are not ideal elliptical. If I remember correctly they had some twist in it to get the tips stall a least a bit earlier :-)

[@DarkWolf12278]

People have learned a lot by observing birds, but they haven't learned who taught birds how to raise their wingtips when gliding, even though we all know that birds and other animals don't have reasoning. Go deeper and recognize the Allah who created you and this world, so that you may be successful in the eternal life after death.

[@DarkWolf12278]

​@@RealEngineeringPeople have learned a lot by observing birds, but they haven't learned who taught birds how to raise their wingtips when gliding, even though we all know that birds and other animals don't have reasoning. Go deeper and recognize the Allah who created you and this world, so that you may be successful in the eternal life after death.

[@eriktruchinskas3747]

2:12 wing shapes of planes for example are spitfire, p51, and mirage for round, square, and triangle

[@TheChai1414]

YESSS!!! Was waiting for this video. Great video, Sir.

[@comet1062]

Although elliptical span loads are often stated to be ideal (because Ludwig Prandtl said so in his revolutionary 1922 Lifting-line theory paper), they actually aren't. A bell shaped span load is better (Prandtl also corrected this later in a small often forgotten 1933 paper). Whilst all the aircraft manufacturers were busy playing 'who-can-make-the-most-foolish-looking-winglet' Albion Bowers put two-and-two together and wrote a paper entitled 'On Wings of the Minimum Induced Drag: Spanload implications for aircraft and Birds' - catchy? No. But I think it's revolutionary. That paper singlehandedly gets us to a position where we can get rid of Vertical stabilisers and adverse yaw whilst drastically reducing drag. Go and read it if you found this interesting. Seriously. It's awesome.

[@TheDmulcahy]

Ok, this video is good. Gives great explanation.

[@Yoklo]

Your videos are amazing! So easy to understand and great quality. Keep up the good work!

[@stats8391]

Partially correct. The winglet also utilises the flow around the end of the wing in order to produce a little thrust which offsets the vortex drag a little. Any reduction will be an efficiency gainer.

[@fastfiddler1625]

Actually, induced drag is a function of producing lift. As a plane flies, it has a positive angle of attack (nose high). The slower it flies, the higher the nose to achieve enough lift. This causes the chord line of the wing to tilt back as well. This means that lift is not produced straight up relative to the earth, but to the wing, so some of the lift is actually drag.

[@AmbientMorality]

Lift is defined as perpendicular to flight direction. Lift and drag are just arbitrary ways of breaking up pressure forces anyway

[@TheLpd1]

I'm fucking in love with this channel

[@hebraist]

Awesome video! Thanks.

[@1946Ash]

Winglets have been understood since the beginnings of aviation. In fact an Englishman, Frederick W. Lanchester described them in 1897 before the Wright Brothers had even taken flight. Like many great pioneers of his time, Lanchester looked to birds for inspiration. He noted that soaring eagles had splayed upturned feathers at their wingtips and he incorporated this into his designs for model gliders.

[@BantamJJ]

This is a great explanation.. thank you for making this video.

[@scwarzewaffe85]

Thank you for this video.. Helps a lot with studying

[@netkohen]

Im so happy ive found this channel! Just finished watching all your videos! I have to say that this channel is amazing. Videos about interesting things and on top of that you create all the cool cartoonish designs that help us understand what your talking about. Gr8 channel, looking forward to your next video!

[@carloslvaldez7239]

I love it already!

[@LK-wf2pf]

Awesome stuff

[@jibeneyto91]

An idea for your next video: Why are planes made out of Aluminum and not Steel? People might think it's because Aluminium is lighter. While it is less dense than Steel, in relation to the amount of load it can carry both are similar. Aluminum is used because, with its smaller density, it increases the thickness of panels which in turn improves the behavior of the structure against buckling. Buckling is a big problem for aircraft structures.

[@loganp6452]

This is a great video!!

[@fermainjackson2899]

regarding winglets, is it right to say that F4 Phantoms had winglets??. it seems to me F4s were the 1st massive manufactured aircrafts with winglets. Please, correct me if I'm wrong. Thanks

[@ChrisZoomER]

I made paper Winglets for my foam glider to make them fly better. It actually worked and now they fly much farther, faster, and for a longer time before they land.

[@jompis007]

Love your videos

[@AugustusTitus]

The Lockheed F-104 is a good example of a diamond wing configuration.

[@elwindewitte]

Great channel! I subbed. Love the way you explain things so easily! Keep it up!

[@feelingzhakkaas]

Nice informative video. Question: does the high rpm of engine creates the gyroscopic effect on the plane during flight or during maneuvering?

[@StatusCloud]

Nice video, keep up the good work!

[@ethanwolin2580]

keep up the good work fam

[@techmantra4521]

Nice video. I like the idea that engineers can take ideas from nature, and apply them to our own world.

[@lesliedelapaz2209]

Great Explanation!! Thank you!!

[@hamlettelmah441]

I recently noticed a plane that had Winglets pointing up and another one pointing down. What's that all about? Just had to subscribe since i loved this video and I'm sure i will find more of the same. Thanks

[@sakinano99]

you're wrong about how planes fly. their primary operational principle isn't the pressure gradient from the shape of the wing. if that were true, then planes would not be able to fly upside down, which we know they are capable of. the main source of lift is a sufficient angle-of-attack of the wings deflecting incoming air downward, which by newton's laws, forces (literally) the plane upward. source: my university physics professor (who also happens to be a licensed pilot)

[@Rhannmah]

Planes fly because of a combination of both these principles.

[@sakinano99]

saying "planes fly because of a combination of both these principles" is like saying meteorites burn up because of air friction. technically, it is a contributing factor, but it's incredibly misleading. probably like 99% of the reason meteorites burn up is compression of air in front, and similarly probably 99% of the reason planes fly is the angle-of-attack principle. otherwise, again, how the hell would planes be able to fly upside-down?

[@chrispeter07]

So there are a lot of things that are kinda woven together in this. There are two things about the wing that will cause it to create lift, chamber and angle of attack. Chamber is basically the curvature of the wing. When flying upside down the chamber would work to create a downward force, so the plane must fly at a higher angle of attack to counteract it. When describing the physics for why a wing works there are multiple ways to do it that are all correct and equivalent. The most commonly used today is to use newtons third law as you did. The second method is measuring pressure as done in the video. This is equivalent to the newtons third law method the same way that you could model the path of a projectile using either forces or energy. The reason this is not done nearly as much today is due to a commonly repeated fault in logic about why the pressure is different. The false statement is that the if you chose two particles of air that were next to each other before reaching the wing, and one goes over the wing while the other goes below the wing, the two particles must meet again at the trailing edge. Since the particle going over the wing has a longer path it must go faster, which by Bernoulli's law means the underside will have higher pressure. In actuality the two particles will not meet up, but that does not mean that the underside isn't of higher pressure. Another way to think of it is that the high pressure on the underside of the wing will make the air want to move, but it cant go up through the wing, so it must go down. By Newtons third law the air accelerating down will create an upward force on the wing. A third, far less simple although actually more accurate is through analyzing circulation around the wing. This is very complex and rarely used but basically there is a phenomena where there is a very thin layer of air moving in a circular motion around the airfoil. This thin layer is actually moving backward on the underside of the wing. By measuring various parameters such as the speed you can calculate the lift.

[@karoma7898]

THANK YOU! cheeses crust, most people are mistough this information

[@jaishetty8586]

How planes fly is as mysterious as why they fly at all. Bernoulli says its pressure difference , Newton says action/ reaction. I don't understand why the fast moving air on top has to meet with the bottom slow moving air at all. My professor once told me , " given enough power , ANYTHING flies. even a stone. " the plan is to make it as efficient , as controllable as possible. We are still learning. our current efficiency is no where close to that of birds.

[@kobi2002]

Very informative. Give thanks.

[@AnhTran-qz6pj]

ohhh Boeing 787-9 operated by Vietnam Airlines

[@mghotbi4462]

Nice video!

[@ragnarok1992]

got here because of wendoverproductions :)

[@lewisdsd]

So, I understand perfectly fine how does a winglet works, but I have one question: why airplanes started to use winglets until the late 80s, early 90s, if you were saying that this was caused to reduce fuel consumption during the 1973 oil crisis? For example, McDonnell Douglas DC-10s where developed in the late 60s, early 70s, coinciding with the oil crisis, but they where widely manufactured during the 80s in a post-oil crisis era without winglets. And it wasn't until the 1990s when they upgraded to the MD-11 that they started using winglets. 🤔

[@balloutbubss]

Lewis DSD because it had an engine on its tail

[@type93thunder]

Petition for real engineering to make an 10 minute video of him saying “those little curly bits”

[@purplesalad]

Hey can you tell me what the purpose of a spoiler on a car, versus a wing on a car? thanks

[@purplesalad]

+oO360FanOo | DronezZ ive been dying to know! :)

[@RealEngineering]

+oO360FanOo | DronezZ Will definitely do it at some point. It has been added to the list!

[@RoboKid360]

+oO360FanOo | DronezZ hopefully i'm right but from what i remember, A spoiler would do opposite of that of an airplane wing, it would have low pressure air forming on the bottom of it's surface while high pressure would be forming on the top of it's surface. This create a total force facing downward towards the ground, keeping the car low to the ground at sharp turns or fast speeds. very important feature for a race car. Spoilers also allow the ease of air flow throughout the car's body, reducing the drag and increasing efficiency.

[@purplesalad]

+RoboKid360 then whats the purpose of a wing on a car? :\

[@Naked_Snake]

+oO360FanOo | DronezZ Check the answer by Ryan Carlyle. www.quora.com/How-much-downward-force-does-a-spoiler-produce-and-is-it-significant-enough-to-make-a-positive-impact-on-acceleration Best explanation I've seen so far.

[@mrx6795]

Lovely.

[@MultiSciGeek]

Wendover Productions brought me here. I heard your accent, subscribed! (idk why it's funny)

[@luizp212121]

Hi! Your videos look very sharp and professional, congratulations! Which software do you use?

[@RealEngineering]

+Luiz Miranda Adobe Illustrator for "blueprint" drawings and I animate them with Adobe After Effects

[@haldanechin620]

subscribed! keep up the good work!

[@slaptaszaidimas1444]

maybe you can do video about something whit bridges or inflatable room in space.

[@GeoCalifornian]

0:30 “But ask the animals and they will teach you” ~Job 12:7 /Lonewolf Liberties

[@PrtKillerZ]

Portugal!!!

[@carlramirez35]

Would there be much benefit from adding winglets to an ATR72, Bombardier Q400 or Sukhoi Superjet?

[@adhynugroho9424]

That background music... sounds very Final Fantasy.

[@Thelostboots]

Here from the jet lag layover podcast haha

[@gnosticbrian3980]

Wings generate lift because of Newton 's third Law. In forward motion, the wing is angled to deflect the air flow downwards. Newton 's third Law results in an upwards force (lift) on the airframe. This explains how flat wings and inverted aeroplanes can generate lift.

[@AmbientMorality]

that doesn't explain how wings deflect air down, just that they do. doesn't help explain much

[@NullablePanda]

NEED MORE VIDEOS MAN DEMANDING CONSUMER ERGGG ERGGGG:D

[@riccobastien3787]

Gallons, miles ... How so very quaint .

[@zhurs-mom]

Bald eagles per fortnite streamer

[@5flightsinarow103]

1:34 TRIANGULAR IS A DIAMOND!

[@WarriorofCathar]

I was almost done writing a hit hip hop song. Then I found this video... Now I need to replace a verse, hope you guys can help. "Fookin Winglets how do they work?!"

[@hk07666]

No background music at all is way better than background music that's too loud. Other than that, great video!

[@Barri2410]

What about the Airbus' AlbatrossOne with _natural_ folding wingtip? Is it better than the fixed one like we mostly found?

[@pinionizzimo]

Do the Whitcomb video!

[@wellwisher4788]

I am not engineer nor a scientist but believe me this I had winglet idea while on board from 1977 to 2018.

[@nathanng2629]

How about raked wing tips like the 787?

[@xXBl4ckB3ltXx]

They basically do the same thing- reduce the induced drag. The only difference is that the wings end on a point, and not an edge like some wings without winglets are. I know this seems a little hard to understand, but trust me on this ;)

[@Kebab_with_extra_garlic_mayo]

one of the main reason a 787 does not have a proper winglet like the a320 neo is because a proper winglet also increases the shear "stress"in the wing, and according to what i was told by my prof, the engineers at boeing found that the current 787 wing could not sustain such loads caused by it