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@williamfriar6295 8 сағат бұрын
A slight vacuum “pulls” the wing in the general direction of the curved side, while the impacting air on the flat side forces the wing away from the flat side. A sheet of plywood can be a wing if its AOA is carefully controlled. This leaves me thinking the greatest “force” is the one acting on the flat side of the wing. The question still remains: how can a conventional airfoil “fly” while upside down? Because this is KZbin, I will automatically disagree with whatever responses I receive. Thanks.
@lewistempleman9752 12 сағат бұрын
Wings dont provide lift, people do
@pauljohnson3336 6 күн бұрын
So how then can we fly upside down?
@borincod 9 күн бұрын
Trying to explain the lift, people tell that pressure difference above and under a wing causes it, or a wing just adds a downward momentum to an air. It's hillarious these two groups disagree with each other and both provide correct explanations at the same time. Commentary: the first explanation is based on analysis of applied forces and the second utilizes momentum concervation law shortcut
@rolandnelson6722 10 күн бұрын
Why would anyone think the air did take the same amount of time? They are friends?
@borstenpinsel 13 күн бұрын
This explanation is so silly. Like "hey bud, gotta go up, you gotta take the bottom part. But we'll meet at the other side at precisely 6:30 see you"
@BennyCFD 13 күн бұрын
LOLOLOLOLOLOL........Well duh, it does travel faster going over the wing, that's how it generates lift. It's called the Bernoulli principle. As velocity increases pressure decreases.
@christopheryellman533 14 күн бұрын
The equal transit times debunked, yes. However, the statement "it's the curvature that creates lift" is still misleading, it seems to me. Take a flat board and move it through the air and it will generate lift if it has a positive angle of attack. It is the pressure differences that directly generate the lift. The curvature of the wing facilitates smooth air flow, which increases the efficiency of the airfoil.
@borincod 9 күн бұрын
The video does not provide an explanaton of the lift force at all. It only points at circulating misconceptions.
@christopheryellman533 9 күн бұрын
@@borincod I know, I was providing my explanation.
@graemejoyce5629 14 күн бұрын
Roofs are lifted in storms due to suction.. low pressure by the wind speed over the top. Not an extra force applied underneath .. a differential. Yes there is pressure from the wind on the underside of the wing, but you can see a vortex effect on the top as the wing gets thinner (sucky, suck, suck). The tilt on take off and lnding .. ground effect (rolling ball of air) .. fast flight- the underside is nearly flat. School 1sf physics: get a sheet of paper, hold front two corners, blow across the top = lift.
@mkk3a 15 күн бұрын
Sooo... the air moving over the top surface is faster, so the pressure is lower, and the lift force is greater. So despite the small error in the common explanation, the overall concept is still true. Faster air movement → lower pressure → pressure difference → lift force Or am I still misunderstanding?
@blusheep2 15 күн бұрын
That is how I took it. The end result of the experiment is that on the most crucial part of the upper surface of the wing, the flow of air appears to be almost twice as fast.
@TheNitramlxl 16 күн бұрын
holy moly.. if Cambridge published this nonsense 10y ago, i wonder whats the state these days 😮
@blusheep2 15 күн бұрын
How do you figure its nonsense. Did our eyes deceive us?
@txkflier 18 күн бұрын
If you don’t think a wing pushes the air down, how do you explain that fact that a propeller moves an airplane through the air? Do you really think it’s creating that much of a vacuum in front of the prop?
@michaelpcoffee 18 күн бұрын
Lift is the air being accelerated downward; which accelerates the plane upwards. Simple newtonian physics.
@christopheryellman533 14 күн бұрын
Agreed MPC. All this talk about wing shape is secondary. A well shaped airfoil smooths the flow, making the wing more efficient but not changing the root cause.
@davejones542 18 күн бұрын
Speeding up means lower pressure. Also the air hitting the bottom surface creates a reaction. So two ways the wing is lifted. It isnt complicated.
@sacr3 19 күн бұрын
I dont know where people get the idea that the air meets up at the end, its silly. I also know that this isnt the only effect that allows planes to fly, its also the angle of the wing, the wind "strikes" and.pushes the bottom of the wing on an upward angle, forgot what the effect is called but its something you can mimick outside a window
@iainmackenzieUK 11 күн бұрын
well I dont think its silly. I understood it to be this way - if they dont meet up, then there would be a vacuum which is not possible. But in fact (according to my understanding now) there is turbulent flow at the end. - not silly - just misunderstood..
@mcdavebob1775 18 сағат бұрын
Newton's Third Law of motion?
@Cheva-Pate 29 күн бұрын
In a wind-tunnel the air flow both side of the wing, in flight only the wing moves the air doesn’t do shit it just still!
@domonkosludvig3314 Ай бұрын
The upper stream doesnt speed up, rather the lower slows down.
@thespacemanfil 19 күн бұрын
Or it's both
@domonkosludvig3314 19 күн бұрын
No
@domonkosludvig3314 19 күн бұрын
Im sorry, that wasnt a very nice answer. Pause at 0:57. Look at the lines. The upper stream is vertical and the bottom is diagonal. If the upper stream had any speed change it would be diagonal aswell. An airspeed speed-up at the top would mean the sand lines would rotate counter clockwise (or paralell to the bottom line), but they dont.
@krzysztofmaurer850 Ай бұрын
The cyclometer was invented by Marian Rejewski, and constructed according to his exact instructions probably in 1935.
@connorkokora3014 Ай бұрын
I was really anticipating another paragraph of narration.
@TheTruthKiwi Ай бұрын
So does this mean that the moving air is pushing the wing up afterall?
@domonkosludvig3314 19 күн бұрын
Only if the wing is at an angle like here... Otherwise lift on a wing shape is generated by the absence of pressure at the top, while pressure at the bottom stays relatively the same. So if the wing is not at an angle lift is because of the vacuum pulling from above, not the air pushing from below. Do note zhat when i say not at an angle, i say that the bottom side of the wing is paralell to the airstream, and the top is not. That angle on the top makes the vacuum and the lift. Sorry for the essay. Have fun imagining it! :)
@TheTruthKiwi 18 күн бұрын
@@domonkosludvig3314 Do not apologise my friend, thank you very much for the explanation. I'm a bit dumb and am trying to get my head around it! 😂 So I'm guessing this method is much more efficient than air pushing the wing up from below? Also, can a stall occur when the lift is changing from pushing the wing up from below to vacuuming the wing up from above?
@domonkosludvig3314 18 күн бұрын
Yes! Efficiency is what makes this shape powerful, you got it! Do you mean when the plane stops lifting its nose up? I would say it does not stall. I think when the angle of a wing changes, the flow of air stays the same above the wing, it does not stick to the surface, so if the wings are returned to a paralel state they do not experience a sudden and brief pressure from above, if thats what you were thinking, if not, please elaborate.
@seeexy Ай бұрын
this is super cool !! 😮😮😮😮😮
@rolandtamaccio3285 2 ай бұрын
The end of the upper surface of the wing , or the end of the effective area , as seen by the flow separation ,,, ?
@spvmentors7258 2 ай бұрын
Excellent. kzbin.info/www/bejne/bKakoWlroruFe8U&lc=UgznQYWvM0GoBUk6M2Z4AaABAg
@reyanshshetty6889 2 ай бұрын
I had a question, why does it matter if the molecules reach the end of the airfoil at the same time, if the molecules at the top surface reach earlier, it would mean that they are faster and there by the lift force would be generated via bernoulli's principle.
@franksizzllemann5628 2 ай бұрын
Look how the smoke lines are compressed together underneath 0:55 , the wing is riding on the compressed air underneath, not simply being sucked upward by low pressure. The top surface is what allows control. When the airflow over the top becomes disrupted by AOA for example the wing stalls, it loses control. The upper surface may provide a little "lift" but the lower surface provides "heft," so to speak.
@TheTruthKiwi Ай бұрын
@@franksizzllemann5628So, we have been mislead when they say it's all the air above the wing "pulling" it up? It is pushing from below which seems more intuitive.
@XxGameBusterxX 2 ай бұрын
Technically you can 3d print the fish since it would be under $50 lol. Also instead of having a servo motor swing back and fourth have it go in a rotary motion to linear or something along those lines.
@BCarli1395 2 ай бұрын
Good work, guys. Thank you for sharing.
@johnbolton292 3 ай бұрын
That is cool! I can think of several applications for it.
@hannahg.1388 4 ай бұрын
Thank you for this video! I have been doing some family history and Gordon is my distant cousin, what a treasure to be able to hear what someone sounded like!
@bagnon 5 ай бұрын
This demo doesn't create vacuum like a plane would.
@alitheia4946 5 ай бұрын
Make solar cheap put raising massively carbon tax of fossil fuel. By honestly cheating this is a way out of fossil fuel.
@unlimitedorb9786 5 ай бұрын
horror game...
@itsrupamm 8 ай бұрын
from edupoint
@RationalDiscourse 8 ай бұрын
0:42 I don't see that it "speeds up as it approaches the airfoil". If anything, it appears to lag behind the smoke in the undisturbed airflow at the top of the screen. If the air doesn't accelerate over the top of the wing, how can it generate the well established low pressure which generates the lift from the top surface?
@米空軍パイロット 3 ай бұрын
If wings could actually create a net acceleration of air, they'd create thrust.
@RationalDiscourse 3 ай бұрын
@@米空軍パイロット a) Babinsky says they do and b) I don't think the video shows that, so how does your reply relate to my comment?
@米空軍パイロット 3 ай бұрын
@@RationalDiscourse Let me tell you straight. You don't understand what you're looking at, and you forgot what you wrote 5 months ago. You shouldn't be surprised that the freestream airflow is outpacing the upper surface flow. If it were the other way around, the upper surface would be creating thrust.
@domonkosludvig3314 16 күн бұрын
This comment is making me angry. You are throwing away a logical idea, because it sounds wrong. The upper surface does create thrust, its just expereinced as less drag. Think about it, if the wing is not moving, the upper surface is not gerenrating thrust, so no rules of the universe are broken. This is what makes a shape more aerodynamic. That thrust is real. Man i really need to publish a paper on aerodynamics, humans (except for me for some reason) are garbage at aerodynamics.
@RationalDiscourse 11 күн бұрын
@@domonkosludvig3314 The upper surface does not generate thrust - it creates lift and drag. The thrust comes from the engine on a plane, gravity, or updraft on a glider, shaft torque in a propeller.
@ricardocortes454 8 ай бұрын
This program looks great. I am very interested in Fusion Energy in particular. How focused is this program to prepare grads for the Fusion industry? My very end objective is to reach the Fusion energy industry Thanks a lot!
@Lonesinging 9 ай бұрын
Was thinking of this cuz many paper waste in office can be managed just thinking if it is cost efficient also. But welldone this can be very helpful
@saeedbarari2207 9 ай бұрын
has it been widespread yet? under what name? because i can't find it anywhere, and it seems like a very helpful tech so its weird if its not sold yet
@thomasholt3697 10 ай бұрын
Wow, this is pretty cool. It’s kind of insightful about lighting actually
@hilaryoborgahyujie8059 10 ай бұрын
Great submissions
@farhanshahidan7713 10 ай бұрын
Banga tngok org melayu boleh berjaya❤❤
@fatherstevecanby 10 ай бұрын
Really God has blessed you Amanda. Your parents are very proud of you! You're a credit to us all. 🥰🤩😁
@SHAINON117 10 ай бұрын
Eoic ❤❤❤
@chancejewell8625 10 ай бұрын
Is this BFS? I just made my own maze generator in python, and I want to try some pathfinding algorithms with it. I figured bfs or dfs would be easiest to implement
@chinthasamarakoon111 10 ай бұрын
You are a valuable student in Sri Lanka and you exhibit new challenges. God bless you ❤❤❤❤❤
@bradleyseng9563 11 ай бұрын
Came from TikTok. Great and condensed presentation
@DSadwel256 Жыл бұрын
Looking forward to join you October 2024
@mnblkjh6757 Жыл бұрын
🤣😂
@PoPo-xp7yk Жыл бұрын
fascinating - but didnt explain anything.
@EngineeringCambridge Жыл бұрын
You might find this an interesting read: www.eng.cam.ac.uk/news/enigma-code-breaking-machine-rebuilt-cambridge
@laxeystu8096 Жыл бұрын
Nice video. Very clear
@JasminDiebolder Жыл бұрын
Hilfe
@hmsthunderchild128 Жыл бұрын
Nein
@kamalkhan-l6c Жыл бұрын
Price? in pakistan
@asaal7399 Жыл бұрын
very very cool. whats the current state of real time world modelling ?