Aerodynamics Explained by a World Record Paper Airplane Designer | Level Up | WIRED

John Collins, origami enthusiast and paper airplane savant, walks us through all the science behind five spectacular paper airplanes. Most people know how to fold a simple plane, but paper airplanes can take as much from science as the newest car designs.
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[@WIRED]

Hey everyone, would you like to see in-depth tutorials showing how to make the paper airplanes in this video? What's your favorite paper airplane design featured here? Reply to this comment and let us know. We'd love to hear what you have to say.

[@muhammadjalalkausarayub3274]

Ok I am first

[@spiceydice6968]

Hi WIRED, I had an assignment to do with paper airplanes, and I was desperately looking for the science of paper airplanes video/article. That assignment was due yesterday XD. Thank you for making this video anyways!

[@corridourthoughts]

Yes yes

[@marks2614]

Yes

[@mariechidiac6440]

Absolutely yes. We need those tutorials.

[@345varunreddy7]

The combination of his explanation and animation and his little bit jokes result into understandable explanation

[@munta5918]

375 likes lmao

[@345varunreddy7]

@@munta5918 good u replied i never checked this comment lol

[@onebylandtwoifbysearunifby5475]

It's fun, but not accurate. Lift is more 50% Bernoulli and 30% Newton 2nd Law, and 20% Newton 3rd Law. Here's a good vid by the real deal: kzbin.info/www/bejne/h3ymfGeif7GEfrc

[@BoxGamesYT256]

@@onebylandtwoifbysearunifby5475 dude i thought it was gonna be rick roll i was intensely sweating

[@onebylandtwoifbysearunifby5475]

@@professorfrog7181 Yeah, i actually responded to him in a post and kinda laid out that lift is a velocity-pressure system, (like Bernoulli), but he wasn't really interested. Newton's 3rd law only says *IF* you have forces, then forces have to be balanced. Balanced forces don't cause any action. Lift is a 2nd Law phenomenon (and some 1st with inertia). But apparently that couldn't be right because "equal transit time theory(?)" was wrong". [Which has nothing to do with lift, since air moves faster over the top foil anyhow]. You Can lead a ... But you can't....

[@keanyl7882]

16 minutes of watching a guy talking about paper airplanes i do not regret it

[@HeliosFish]

And he seems to be getting better with age too! His presentations always feel pretty fresh to me and not a simple rehash of his older interviews

[@treetzataylor8509]

Me neither because I have to build an airplane for a science grade so this definitely helped

[@rohitgovil]

@@treetzataylor8509 same exam topic is about aero planes

[@RedBird9721]

16minutes and 38 seconds bud

[@BC_Editz676]

Neither

[@nicoomycousin]

This guy has great stage presence. He’d be a great host for an educational tv show about physics

[@beingsentient]

I see a lot of arrogance and erroneous beliefs about physical principles that few of us who have professional careers on the subject have a problem with. He seems to do well with paper airplanes, but the design of real airplanes is far outside his capabilities and understanding.

[@MrBarakados]

He gives public talks at the Maker Faire!

[@Hammywastaken]

@@beingsentient bro. who cares. i just wanna hear the man talk about paper airplanes

[@angelbythewings]

@@Hammywastaken and btw if @memyself is going to make a statement, he might as well create a video that explains the concepts, rather than saying someone is arrogant.

[@professorfrog7181]

@@angelbythewings literally open any textbook about aerodynamics and everything this guy said is literally contraddicted on every level. Absolutely no need to make a video about it when that is the case.... This guy is arrogant, you are too.

[@Abnv2]

Me: makes paper airplane so i won't get bored of studying Also me: realizes there is more maths in making a paper airplane than in my book.

[@curaniumyt]

My teacher: He is the messiah Me: No, I'm not

[@beauboi3381]

But at least its easier and more fun to understand

[@vantablack6494]

@@beauboi3381 Yes

[@Molivi]

bravo. now you understand why you study in the first place.

[@jeyhuan9194]

@@Molivi to make paper airplane

[@everyday3164]

Teacher : 'you can't have a career by making and playing with paper airplanes.' This video : 'are you sure about that'

[@drainedddddd]

stolen, but nice

[@XimCines]

Just don't be cocky.

[@pokedandhockeycards3668]

🤣

[@everyday3164]

@Arlo...... It was a joke........ :/

[@darthvader2533]

Even the teachers dont know the aerodynamics explained here.

[@anilkullu4766]

He's that one teacher everyone wants

[@Jack-fg9qp]

true

[@spiridonpa7080]

@@professorfrog7181 ok then, i would like you to teach me, based on your academic knowledge of aerodynamics, how to make a better paper airplane than the one that currently holds the world record.

[@daroldcarold3443]

@@professorfrog7181 how is this wrong, I won a contest in my school using the last paper plane?

[@aviaterbuoy7950]

exactly

[@R7B.]

Yep

[@LeBeautiful]

now, my paper airplane going to have better dynamics than a boeing 747!

[@rossyboi712]

Bruh

[@glorbnorgaborg37yearsago10]

@@yo-boy-aj ... do you really not know what a boeing 747 is?

[@randomguyonyoutube4975]

@@yo-boy-aj *_It's A Plane_*

[@RicardoHernandez-sz2yp]

It's a joke

[@powerhousepaperairplanesrogers]

Checkout my paper aircraft

[@sujithpc]

Nice, Now I can beat my 5yr old nephew in paper plane flying contest

[@A_Ottoman]

atleast say thank you to the youtuber

[@NoCl_Battleson]

LOL

[@Jack-fg9qp]

that sounds fun!

[@aaronjohn1952]

B.tech maaman

[@denswix]

you havent yet?

[@owen6339]

This is one of the best video explaining aerodynamics out there. He dose a fantastic job adding the simple concepts to the complex. Really well done!

[@macrumpton]

It's a pity that there are several serious errors in the presentation.

[@sagenberg3918]

@@macrumpton true. I am glad I am not the only one to notice. He mixed up a lot of the terms like boundary layers with magnus effect & coanda effect etc. I guess it's good enough if just want to get the gist of it, but to learn seriously, NO!

[@onebylandtwoifbysearunifby5475]

Yeah, as above noted: it isn't correct. Pressure difference is actually a large part of lift. Circulation is a result of pressure differentials. Both downward displacement AND pressure difference need to be considered.

[@onebylandtwoifbysearunifby5475]

Here's a more accurate one: kzbin.info/www/bejne/e2TMkIt-obt2m7c kzbin.info/www/bejne/h3ymfGeif7GEfrc

[@AndrewPa]

Downwash has nothing to do with explaining lift. Same as 3d law of Newton. When people will start using correct equations to explain aerodynamics - NS ones. Do not forget you deal with fluids and some Newton laws look very different in fluids since we need to take into account motion of all little particles- atoms.

[@btt5830]

Lift to Drag Ratio = Glide Ratio 7:41 ---‐----------- Big wings = More drag||Small wings = Cut through air 7:21 --------------- Air will follow the shape of any object 4:29&10:27 --------------- Stall = Is when the air cannot follow the shape of the wing 10:33 --------------- Drag = The Air molecules are trying to halt the kinetic force of an object 2:09 --------------- Boundary Layer = The air stuck to a object(Which is spinning) will move with the object 12:24 ---‐---------- Slower fluid speeds = High Pressure Faster fluid speeds = Low pressure 3:37 -------------- Wing Loading = Weight of Plane ÷ Surface of Wings High Wing Loading: Moves faster for lift Low Wing Loading: Slower to life the weight 6:36 I'm done now😃

[@yeshua1444]

Amazing!!

[@smajyman6496]

Even his hair looks like a paper aeroplane

[@eustache_dauger]

Reduced drag for better aerodynamic

[@bluesharkblox2450]

HEHE

[@shlokraval8419]

Yah

[@linghan3635]

High speed, Low drag

[@evosagara]

@@bloundiegurl258 bot

[@juralaes123]

I thought I was about to see a tutorial on building paper planes, instead I found out an amazing class of physics, well done. Thanks

[@pjrichfart1117]

I have just won a competition for paper aeroplanes in my school using Suzan (the last one)

[@E_X_K]

*Suzanne

[@dizzy_merv1826]

Gg

[@ber2949]

*suzanne

[@potatokingplays2641]

well it is the world record plane for distance lol

[@rockopeace]

I didn’t know i need to know all this. Wow

[@Jack-fg9qp]

one day if someone randomly asks you to a paper airplane contest, you'll have this knowledge to obliterate them ;)

[@bharathimahadevkudavakkali5370]

@@Jack-fg9qp lol also like ya pfp !!!!!

[@SilverSmithShieldLtd]

G CDC gffdgffdfxfx gfffccvdfffrt5tfyf FCC vg7 iui booo999nhbvgg555 ghb vg GB of victory Fuji guy is t guy y FCC gt TV guy 6bu id tut 6AM and gygax ugh guy g tug h&hbjbhh in bkjjjj ng hhb hgv vhvgv bc TV c fcffcfccfxcxfffevbfhd in df7ddffydgd u fghddgdg

[@bringthemustard8411]

John Collins is a great presenter and speaker as well as incredible paper plane master.

[@christiancordeiro3030]

Im a 4th year aerospace engineering student and this was the best explanation of basic aerodynamics ive heard so far

[@windowsxseven]

you need new teachers

[@sagebrushaviation420]

I have been teaching people to fly for over a decade and thought I had a good way to explain the magic of lift. This is the first time I have heard the term "coanda effect" but it makes so much sense. Never stop learning. Thanks for the great video.

[@trashtan]

His jokes and perfect explanation as well as his animation makes it even better to understandable, and even his hairs look aerodynamic😜, But well job WIRED👍!!!!

[@professorfrog7181]

Perfect explanation? Literally as wrong as it gets. The bernoulli equation absolutely works outside pipes, the coanda effect only applies to jets and not to generalised flows, and the pressure and downwash explanations of lift are literally two faces of the same coin, they're literally equivalent. These are not minor slips, these are major conceptual flaws. This guy does not know what he is talking about, forget everything you think you've learned and go read an actual textbook.

[@thatonepakistaniguy]

@@professorfrog7181 bruh shut

[@oracuda]

1. As far as I know, aerodynamic stalls due to slow airspeed don't exist, "Stall Speed" Is the lowest speed you can fly level until you have to point your pitch up too much that your wings stall out, IE Your minimum level flying airspeed. 2. Bernoulli's explanation on wings is still correct, air can compress and that's easier for it to do than move air around it, so you can think of it as a pipe, partially. 3. You forgot the coanda effect and euler equations relations, A curved streamline has a pressure gradient, higher on the outside of the curve, lower in the inside of the curve, If I can remember correctly, that's due to the inertia force / centripetal / centrifugal (whichever is the right term, I genuinely can't remember but you get my point), And due to this principle, Where there is a curve, there is a pressure gradient, which is why planes may also have concave curves on the bottom of their wings in some areas to slightly increase pressure on that side. Learn engineering has some good videos on it, But either way, all explanations are correct and provide to the lift on the wing, it's a complicated yet beautiful balance of physics in play to achieve flight and aerodynamic lift forces, excluding the false "equal time arguement", because believe it or not, Air particles can't exactly think, communicate and understand eatchother. Edit 1 : About the magnus effect / spinning ball, you can also say that since air at the bottom is slowed down and crunched up, and air at the top is uninhibited, theres a high pressure at the bottom than on the top, creating lift.

[@Tech1Craft]

His way of teaching is very interesting to watch

[@mr.flip3338]

THIS IS GENIUS!!! it's so funny to watch this, and interesting as well. The whole second class of middle school I folded paper planes with my friend but this IS a whole new level!

[@carlatteniese2]

Yesterday evening I watched two videos-one featuring an MIT lecture by an MIT test- & fighter- pilot engineer, the next by a college professor teaching flight school students. Collins’ concise, erudite and amusing lecture on aerodynamics topped them both at altitude!

[@michaelngan99]

"one featuring an MIT lecture by an MIT test- & fighter- pilot engineer" That guys sounds like an idiot, who believes everything he was taught in school.

[@iurichiba]

He’s an EXCELLENT teacher, loved it!

[@professorfrog7181]

If by excellent you mean as incompetent as it gets then yes. The bernoulli equation absolutely works outside pipes, the coanda effect only applies to jets and not to generalised flows, and the pressure and downwash explanations of lift are literally two faces of the same coin, they're literally equivalent. This guy does not know what he is talking about but thinks he does out of sheer arrogance. If he ever opened a texbook on fluid dynamics in his life he would know. These are major conceptual flaws, any aerodynamics professor would flunk him on the spot.

[@IgnitionP]

@@professorfrog7181what

[@weitao100]

what got me into paper airplanes is how when you throw an airplane in a window shut moving bus, it appears to move fairly fast but in reality is actually traveling the 60+ miles the bus is moving as well

[@boristrofimov58]

holy cow, what a guy! I didn't expect the video to be so captivating!😄

[@invox9490]

Passionate playful knolegable people is what this world need the most. Loved this.

[@joel4366]

This is the easiest way someone could explain basic principles of fluid flow and aerodynamics. Years I've spent trying to mug up all of these concepts condensed into single video. Bravo.

[@XimCines]

Some years ago I was grasping that Bernoulli was not the main responsable of sustained gliding (paperplanes don't have the shape). I even managed to go as far as the koanda effect but couldn't pull out the 3rd Newton's law in place. I even asked some physicist and searched for some videos and texts without answers. I am jelaous and grateful for the great video.

[@nicholaslau3194]

If you would like a comprehensive explanation, I recommend you check out "Understanding Aerdodynamics" by Doug McLean, a retired Boeing expert. In short, what he says is that all of the "explanations" have some flaws which cannot be answered thoroughly. The only real way of explantion is by solving the Navier-Stokes equations, which is just Newtonian mechanic applied to a fluid. There is just no simple explanation of how lift is generated.

[@XimCines]

@@nicholaslau3194 thanks, I love your commentary. Now looking for the book and the equations. 😃👍

[@onebylandtwoifbysearunifby5475]

@@XimCines Here is a 30 min video by the guy above: kzbin.info/www/bejne/h3ymfGeif7GEfrc

[@XimCines]

@@onebylandtwoifbysearunifby5475 thanks

[@fredydiaz1180]

Spent my whole childhood making paper planes and they did fly but never thought of aerodynamics. We used to go up to hill and see them fly. Some did really well others just fell few meters away. This last year I wanted to remember my child times and went up to a hill and made one trying to do it more carefully and the result was amazing. It flew for more than 2kms.

[@libby2803]

My 11 year old was fascinated with this video and made me watch it. It was fantastic! John Collins is a great presenter. Thank you!

[@NickOtury]

Hated physics classes, now this guy has re-ignited my interest...learnt a lot in my quest to make a simple paper airplane for my kids..complicated and simple at the same time.

[@Odqvist89]

The most beatifuly made match between practical engineering, science and an hobbyist artwork that I've yet to see on KZbin. Thank you,

[@jaymittal2835]

Mad respect to John.. passion at its best. Amazing.

[@MrHamster3337]

2:39 love that, he shows all of the forces. Helps me understand alot

[@Reavenk]

The science in this video is phenomenal! The combination of the subject matter, the speaker, and the visuals is zen.

[@professorfrog7181]

The science in this video is also literally as wrong as it gets. Any person with academic knowledge in aerodynamics will tell you that this is literal misinformation. The bernoulli equation absolutely works outside pipes, the coanda effect only applies to jets and not to generalised flows, and the pressure and downwash explanations of lift are literally two faces of the same coin, they're literally equivalent. This guy does not know what he is talking about, forget everything you think you've learned and go read an actual textbook.

[@nadiyayasmeen3928]

This is a truly amazing video. It burst my bubbles about fluid dynamics and aeroplane lift

[@s3cr3tpassword]

This is freaking amazing. As a physicist, i understand the physics of fluid dynamics but I did not learn the aerodynamics applications of it to real plane systems. The use of paper planes and modifying such that you can see the different effects is such a good way to explain both aerodynamics but also how it pertains to real planes.

[@zacharynolan9553]

One of the most fun engineering videos I’ve ever seen. Wish my lectures were this engaging!

[@mattcruse495]

Suznane is like that end game plane that 's high on everything. The plane you want.

[@dhrubalaskar9587]

the teacher who would never mind throwing paper planes over him during class

[@nanwijanarko1969]

He's really good and fun to listen to. The animations and edit is aldo great!

[@coriscotupi]

07:27 "Let's go one step further and see how wing loading can affect the distance in flight" Fun fact: when you're gliding... it can't. Two externally identical airplanes, one heavier than the other, will have the same L/D ratio, hence the same gliding distance. The effect here (with paper airplanes) is related to the "thrust" (or "dart", or ballistic) portion of the flight, before the paper airplane stabilizes at is trimmed gliding speed. Once gliding at its optimum speed, gliding distance will not change with weigh. IOW: Instead of being shoved at maximum speed, if two externally identical paper airplanes of different weights were just accelerated and let go at their respective optimum gliding speeds, weight (and wing loading) would not matter and they'd have the same gliding angle and range.

[@ce152capt100]

Collins’ book is great. My 8 year old son got it for Christmas last year. We’ve had hours of fun together with it. Highly recommend.

[@publicmail2]

The downward air at trailing edge is lift? What about drop in pressure on top of airfoil because of velocity increase?

[@onebylandtwoifbysearunifby5475]

Pressure difference IS a large part of lift. Downward force of air displacement is also. This vid made it seem only the latter was responsible. That is not an accurate assumption. It is both. "Stall" is boundary layer sheer. If Bernoulli is not considered, wings would lose lift much earlier than they do, and at lower angles of attack. I must admit i cringed at his explanation. But i came here for the paper airplanes.

[@hamadmustafahusain4837]

I just have to say 1 thing is this is the best aerodynamic teacher

[@prajaktacookingchannel6897]

Yes

[@halonothing1]

I had a book as a kid in the 90s with all sorts of designs for cool paper airplanes that would do loops, or rolls, or boomerang, etc. I had endless fun with it. But I can scarcely make the usual bifold design most people are familiar with these days. My wings always end up crooked, even when I use a straight-edge.

[@emmaarif9797]

I wish my science teacher was this passionate!

[@pushing2throttles]

Wow. Mastery level explanation of aerodynamics. Really intuitive and explained so well. Plus, that was really cool! I wonder where the design for Suzanne resides online.

[@Name-ul8es]

You also can add oblique triangular wings to tube by folding. it makes it go more stable and more in a precise direction. Or thats how I make my tube paper planes.

[@angelbythewings]

This was an interactive science class not a class on how to make paper planes. Thank you John

[@rlewter]

Yes, a video showing how to fold the Suzanne would be appreciated.

[@sabusivaraman4847]

No

[@habibaumar5329]

@@sabusivaraman4847yes

[@ashleyhamman]

I was quite into paper planes when I was younger, so was familiar with some of these, maybe all other than the canard. Basic square was my go to, though my consistency on wing depth wasn't perfect.

[@feeling-dizzie]

He's a very good host/communicator

[@mikhaelstibino]

Unexpectedly interesting. You me watch 20 minutes of video about paper airplanes with an open mouth, and that's amazing

[@rusty8983]

I teard the paper in the middle of the wing like a spoiler instead of curving it and it worked great

[@elizabethbrown2463]

I'm a professional scientist and these explanations help, but I'll never understand this fully. You can tell me about these forces all day long, and I have done calculations to measure them. I'm glad other people get it.

[@onebylandtwoifbysearunifby5475]

Btw, I've come to realize you should listen to people that "don't completely understand" things. If someone "understands it fully", they simply don't know enough to have questions 😉

[@bazookallamaproductions5280]

in scouts, id just fashion a dense 3 inch dart out of paper, and just YEET the thing. always won.

[@EmmanuelQuits]

12:12 woah! No way he did that! That was awesome

[@onedued]

He's not just a paper airplane designer and maker but also a scientest

[@nwartistry9399]

Hi mr john your aero dynamics are the best and i couldnt understand this theory i ve been trying to make paper plane by watching other videos. today i made a paper plane using the techniques you tought and that was like a miracle to me because i ve been trying for weeks to make a plane. thank you very much ps- nice joke about the wings hope you are fine during this period

[@fernandesl]

The official president of Uncles

[@IQzminus2]

The paper plane tie is the icing on the cake

[@jamesconner3437]

@@IQzminus2 ...Nice catch....

[@ramintakloo-bighash6509]

Him and mark rober

[@you2tooyou2too]

Bernoulli has nothing to do with simple paper airplanes, but can be demonstrated by blowing over a sheet of paper held at your lower lip. The Coanda effect has to do with surface tension & a solid surface (which I presume disappears when there is no 'wetting').

[@user-ll5qm1sm3p]

as a struggling engineering student, this was actually pretty helpful, thanks.

[@corneliusrawness]

I REALLY NEEDED TO KNOW THIS!

[@-A-Hybrid-Skunk-Productions-]

Awesome video. I loooove Science. Was one of my favorite subjects in school

[@stevie_k03]

Just realised so many principles are involved in designing a paper plane in order make it fly successfully

[@Deps721]

1:19 buds face 💀

[@dr.m.hfuhruhurr84]

I may be ready for ufos & jet propulsion now; whole much thank you!

[@dr.m.hfuhruhurr84]

Maybe not, but it could lead in that direction 😃

[@covid546]

i was eating when this uploaded!!!

[@fourbirdstos]

This was a great video. I love how you presented this topic. Man there are concepts in this video that I need to revisit and study, but I think it is a wonderful way to expose kids (and adults LOL) to physics and aerodynamics in a short and fun way. Thank you John Collins/Wired. : )

[@theextremegamers7074]

He explains really well!!

[@waterunderthebridge7950]

I’d be so much more interested in physics if I had a teacher like him back in school Lol

[@mithrandir6283]

Please make a detailed video on how to make the planes!!🥺

[@ThePaperAirplaneGuy]

That's coming.

[@mireazma]

Thank you! Very informative. BTW "Coanda" is read as in "wonder" with a q in front (2 syllables).

[@chaktinyu7169]

the best explanation of air flow dynamics so far.

[@sidskywalker8423]

Feel like a true aeromodeller!

[@maxchilla732]

Isnt his lift explanation wrong? Isnt the pressure difference what causes lift?

[@s3cr3tpassword]

As he said, people taught it was the Bournelli effect, but through more research it's likely the Coanda effect. Might have to find the research paper on the effect, but it's possible that the two effects could be the overall contribution to lift, so Bournelli AND Coanda.

[@MatthijsvanDuin]

en.wikipedia.org/wiki/Lift_(force)#Controversy_regarding_the_Coand%C4%83_effect

[@johannespeter1666]

@@s3cr3tpassword As an aerospace engineer currently working on his PhD in computational fluid dynamics I can tell you that no fluid-dynamics scientist EVER thought of of the "bernoulli effect" as the CAUSE for lift. Also the "coanda effect" is not really an "effect" in the sense that it causes anything. It's just a sort of description of something that happens when a fluid flows around an object, and that flow is perfectly described by the Navier-Stokes Equations. Saying "This happens due to the Coanda effect" is simply wrong. "This" happens because that's how fluids behave (again, perfectly describes by the Navier-Stokes Equations), and we call this behaviour "Coanda effect (which is a term fluid dynamicists usually don't even use).

[@briansepolen4917]

When I took Finite Math and all the shortcuts they told me not use in 3rd grade were finally taught. Thanks for the explanation, because thanks to this video, I noticed that I no longer knew how airplanes could fly.

[@ThePaperAirplaneGuy]

@@johannespeter1666 That's how fluids behave-- the Coanda effect. Most viewers of the video aren't fluid dynamicists and won't need to quantify the concept using Navier-Stokes, Bernoulli, and Reynold's numbers. I suppose we could have spent an hour or two at the white board sketching out those details to your satisfaction so that we could leave it all on the hard drive, never to be seen by most humans, who struggled with algebra.

[@nightwing4065]

6:26 Wing loading LOL 😂

[@dilversingh8766]

The way he makes thing clear is awesome.🙏🙏🙏

[@pedro_mg]

excellent visuals, host, explanation. Really good 🙌

[@corridourthoughts]

God I really underestimated .wow! It explained a lot

[@LSPLASHbutfake2023secondchanne]

1:49 was failing so laugh 🤣🤣 john coillions is so best (sorry for lazy of cpatial letter)

[@panzer9942]

I think you can solve drag with winglets like on the 737 max 8 or or the boeing 787 or any aircraft with winglets as it reduces drag

[@anuragd948_2]

I wish he would have taught me in school. I might not have hated Physics that much 😁

[@FingeringThings]

This is how they make Boeings

[@nknerfdart1317]

its you again

[@cybersentient4758]

Man's everywhere lol

[@NoCl_Battleson]

Ha Itz real guy LOL

[@gregcollins3404]

Thank you, I always thought the Bernoulli effect left much to be desired in explaining lift.... (BTW, awesome video)

[@XimCines]

Agreed, I thought the same since the shape of a paperplane glider doesn't match and flies.

[@onebylandtwoifbysearunifby5475]

Your first guess was not wrong. Lift is both Bernoulli (part of 2nd law) and Newtonian 3rd. Although more 2nd Law than 3rd. It's actually pretty complicated.

[@cougarten]

I don't get why the tube works. If it spins lengthwise, why would any force have a preference for up or down? I can only see how would spin-stabilize.

[@ThePaperAirplaneGuy]

Google Kutta-Joukowski for a more detailed explanation. It's like a special case of the Magnus effect for cylinders.

[@kevinnathanael8940]

I didn't understand anything but I'm happy cus he's happy

[@MinipgMini]

പൊളി അണ്ണാ

[@sajreenayasmin7750]

My little boy tried making this paper airplane and we were amazed at how well it went . He loved it !!!

[@gvnady8380]

I wish I got a science teacher this cool back then

[@phaa84]

If my teacher of fluid dynamics explain like him, I would have better grades for sure.

[@yangzifeng7652]

Bernoulli equation can definitely explain the lift with no doubt for low Reynolds number airfoil. In the ping pong case, the ambient pressure is definitely higher than the pressure between balls, so the pressure push the ball to move to the middle. Bernoulli equation can explain this as well. Coanda effect is just a phenomena, it is not a theory, the underlying theory is N-S equation, in a simple way, it is Bernoulli equation. Your experiment cannot prove Bernoulli equation is wrong, although there are four restrictions for using Bernoulli equation: 1. Steady, 2. Incompressible, 3. Inviscid, 4. Flow along a streamline.

[@banjoarefood898]

The UFO/warp drive joke was actually pretty good and delivered well

[@bmn]

I really needed this!

[@mattofthestonevillage7773]

Im on a lvl of god now

[@clover9185]

Directions unclear made a death star out of paper

[@dangkhoinguyen5023]

Wow! Not only it helps me understand more about paper airplanes but also in a hilarious way that have have nothing in common except wings 😛

[@Bollywoodwater]

I am shocked after Watching this video.......😮 can't imagine how one can put such a huge energy in task ❤🎉