I just watched a video on human powered ornithopter, and I wish they had seen your video, because their upstroke was so inefficient. I dream to ride in a small engine powered ornithopter, and I really believe that the feather angles you refer to are critical. I want to flap and glide, nice and easy, without the frenetic flapping of rc ornithopters. Be well, love from LA
i know Im asking the wrong place but does any of you know a trick to log back into an instagram account..? I was dumb forgot my login password. I would love any help you can give me!
Thank you for this, I was looking to see if I could make a mechanical bird sculpture and this helps a great deal. I think we can look at things and easily take them for granted, as you say the wing profile is probably perfectly well understood by ornithologists but as a casual observer I would bet that the quill was closer to the body than the wing tip. You did well to observe the feather construction/layout from the photograph. Your analysis makes perfect sense. Kind Regards … Andy
-Speed of gears -Elastic bands on the wing joints -real feathers -32x 180 degree joystick-like mechanisms (feather spread) -2 x180 degree joystick-like mechanisms (individual wing shrug) -triangle-point gears (circular roration) for wing shrug It would help if I knew what the bones were called.
I've seen other videos where people said each feather is like an airfoil. That's silly. I like yours much better that explains how they work in concert, as a system, all the way down to the barbs. Yours is the clearest explanation I have found. Thanks!
That is the question I am asking myself. I saw a Japanese patent application that proposes a wing flapping airplane, unfortunately it use blue feather arrangement which will not fly at all. Actually to implement this concept is extremely simple, but unfortunately I do not have a plane to test my idea. I hope one day someone will try this idea.
Hi, I like that you've broken down the effect of feather configurations on airflow around the wing. This is quite a helpful tool. However, birds travel within the incompressible flight regime, so the animation of particles is misleading. It shows there being variable density beneath the wing, which you refer to as "supercharging." I believe that what would happen in reality is that there would be a region of higher pressure under the positive configured wing on downstrokes rather than higher density. (It may even just be that there is a marginally higher pressure beneath the positive wing than the negative wing). This, in turn, would change the motion of particles as they are displaced to maintain constant density. So while this animation helps visualize the effect of airflow direction, it could use a bit of rework to account for the incompressible assumption (i.e. it is the differential pressures and velocities that increase flapping efficiency not extra air atoms).
You are very good observer. the statement I mentioned there is not wrong, but it would be better, if I said, In real bird tip feather fully visible, but the blue one it is not. What happens, when the red birds closes its wing, tip feather stay inside the wing. For the blue bird it stays outside. Does this explanation makes it clear?
Yes, They act as Flapper. Apparently this is well know fact, but I did not know that up to a month ago. 7 years ago I did a patent application in which I proposed this flap action without knowing birds were doing it. Actually, flap turbine come from that idea. Yes, ornithopters should do it, but apparently they miss this crucial step and why most of them fail or produce inefficient flight.
I found a feather outside today, the small scraggly whispery tufts closest to base looked like they would pull significantly more drag at the base of feather than it would at wingtip. it’s elongated concave shape cups and angles the air down the length of the feather sort of like a channel on top of the feather rotation to reduce drag on upstroke, the 2D rendition of the wings really lacks the mobility and thus the action of bird wing-power. But the animation is still wrong I’m sticking to it.
I noticed birds use their tail feathers as both an elevator, and an additional lifting surface. under the positive feather/red bird model, the wings push air underneath the tail, making it more efficient - the same way an aircraft horizontal stabilizer responds better/generates additional lift if it is in the prop wash. your model also perfectly explains how birds achieve roll stability, as seen in high wing aircraft with anhedral wings. using positive feathers, the wing that rolls down (due to wind, turbulence) will see a greater angle of attack than the wing that rolls up. therefore the down-rolling wing will generate more lift, restoring the bird to roll-stable level flight. the negative feather/red bird will do the opposite - rolling further into the direction it got pushed by the wind, making it waste more energy. now, would you happen to know how birds go about doing vertical stabilizers/rudders using their feathers in positive configuration? are they using their wing tips as split-rudder ailerons/air brakes to slow down one side (as on a B-2 bomber)?
actually - with the negative feather/***blue bird model (typo on previous comment), if wind pushes the bird to roll to one side, the downward wing will get air flow separation and stall, while the upward wing would get more lift. it would be very easy for the bird to go into an unrecoverable roll. evolution would not let such a thing happen :) thank you for this detailed mechanical animation.
Thank you for your nice comment. The turning mechanism of the bird is combination of tail and the wings motions. I am planning to prepare a video about bird tail motions.
Would it be possible to make an RC ornithopter with this wing structure in mind? It might be a good tool to use to measure the efficiency of the wing. David Lentik used a box with instruments and trained birds to fly in it in order to measure the lift of a bird in flight if we made 2 RC's one with a traditional wing and one with a wing designed like a birds we could probably get some good info on it.
Interesting view, but it's missing a good few phenomena and arrangements in bird flight. For instance, you only consider the feathers, and show the wings as generally static from head to tail, while the real movement is also a complex pushing movement towards the rear, not only a downward stroke, with interesting effects on the drag when the wing tips are ahead. Also, you should consider the body as part of the supporting surfaces, as with the bumblebee (they do fly, whatever calculations state... or, more precisely, they surf on 3D wind vortex they create with their fast wings that act more like propellers than wings). Read NASA's book "sweeping forward" (it's free) and look at the ground effect, there are a lot more clues than simply opening the feathers on the frontward-upward stroke.
Dear Regis, I agree with you that bird flight is very complex phenomenon. For example while Gulls flap their wing much simpler up and down stroke, the Hummingbird flight is more complex, more like insects than birds. Also I now the expression "According to aerodynamics principles, bumble bee should not fly, but bumble bee does not know aerodynamics and that is why it flies." I also know effects of ring vortex on flight, because it was part of my PhD thesis. In my animation I just wanted to emphasize importance of feather in the flight. Opening and closing of feathers are important portion of flight but there are many arrangement in birds body which makes it perfect creature for the flight. However, if there were no feathers birds could not be supreme flier. Nature invented many organs for different creatures in many form and shapes. But it invented the feathers only once.
@@mekanizmalar Totally agree on "many organs", not so much on feathers. I suspect the variety in feathers in shape and size make it a set of principles, not a single "invention". Now, from the efficiency point of view (we're talking dissipated energy here), birds are not the supreme fliers, not evel the owls (the very impressive silence of the flight suggests no energy is lost, but it doesn't make it the most efficient yet), it's well known to be the bat, no question about it. It's a mammal (egg layers are proven to be on the complete other side of evolution) and there are no feathers. Now, I'm amazed with your explanations on the orientation of feathers, and I'm trying to think of a(theoretical) way to implement it in an ornithopter-style thing. How would you make sure to be fully-open on the upward stroke and fully closed on the downward stroke (simplifying a lot, sorry)? Would you rely on gravity alone (that involves more weight, right?), or slats with a concave face down/convex face up, or even weak-enough springs (requires more torque to open the slats)? Did you go further at some stage and made a real-world model of this principle? All ornithopter models I can find on UA-cam use a simple thin plastic layer (likely LDPE) and only rely on the movement of the wings to fly.
I find that the flows bring air over the tail makes a lot of sense. Air flow over the red bird's tail reduces drag of the tail and makes it more effective for its size. Humans design power flight and boats, to have control surfaces in areas of high flow to increase control effectiveness while reducing control size which minimizes drag.
the question is why the hell all the ornithopter i saw non of them used the feather mechanism the just put a solid peace ofter the wings witch doesn't help with the drag on the up mouvment of the wings
I know that birds have extraordinary capabilities to control features. However, I do not know whether they handle flight feathers or not. Since the feater shaft is oof center, enough for opening and closing gabs between feathers.
i think that rc ornithopters doesn't have all of this moving feathears because it will add to much weight for its wings that should be the lightest as possible, do you think it can be a good reason for that
Firstly, I would like to thank you for bringing up the topic You are talking about the flight movement of the (dynamic) bird, but there are many things that are interconnected, not only the bird's feathers - the lung, nerves and many things in the bird's body to reach the amazing flying stage. There is no blind nature that can create a bird with this amazing design. There is a creator of this universe which is God Please see scientific sources from several scientists on UA-cam : (Flight: The Genius of Birds )
hi sir, can you tell me this is which software you have used to perform aerodynamic analysis? I have tried ansys fsi with system coupling of transient structural and fluent but could not succeed
i think the reason that we see only the red kind that the open spots in the feather in the red kind goes in the direction under the body part because the body part is the heaviest that air flow or pressure will work against the gravity which is gonna make the body feels lighter but if u imagine it with the blue one the air flow or pressure will go away to the side which is gonna focus the pressure at the side which is not going to help as the red one does .
Bird flight is a very complex task. I guess birds use their tails to accomplish right or left rotation by just arranging their tail angle accordingly. However, I see birds change direction without a tail. I think they use their wings to do that. However, the tail gives the bird more control to make a turn.
@@seyhanersoy8989 Thanks for reply. Yes, majority of birds might use tail for left or right or use a small portion of their wings to create just enough drag to turn. I find it interesting how a bird doesn’t have the need for the use of a tail like a plane uses to fly straight. Planes do use a elevator section if it’s tail to move up or downward but a bird doesn’t technically have a vertical back tail. Maybe it’s a Birds tail is dual usage like a bonanzas V-Tail combines both elevator & rudder in one area.
Dear Amit, Bigger the bird, slower it is wing flapping and visa versa. Therefore the small birds flap their wing faster. This means that wing feather opening, closing will be much faster. In short air will pass true in between feathers during upstroke. As long as shaft of feather wing are off center, this event will be true.
Thank you for your visit and comment. Both blue and red bird can fly.. However, takeoff from ground would be very hard for the blue bird. Cruising flight for blue bird would be very inefficient. in short, the chances of the blue bird competing with the red bird would be slim.
I disagree with you conclusion and think the explanation is much simpler: The feathers at the tips need the keel to be on the front in order to be stable in the oncoming air. They need to be a miniature version of a wing. This is only really possible with the load bearing element towards to leading edge.
Can the red birds generate the same amount of lift between when their wings go upward and downward? The animation tells me almost the same. i'm a little confused.
In one complete cycle, up and down, red bird generate more lift during take of than the blue bird, since it fills underside of its body with fresh air, while the blue bird does not. During the cruising flight generate same amount of lift, however blue bird experience more drag. This is because the red bird directs the air particles to fill the vacuum behind it, while the blue bird does repels the air particles outward, which causes more drag. In short, the red bird creates more lift during take of and less drag during cruising flight, while the blue bird creates less lift and more drag respectively.
Nice attempt to explain the bird's flight. The only problem - it has no connection to reality. Birds' wing mechanics is principally different, it never fights to the air, always laying down to the air, even in the upper part of the flapping cycle.
Dear Eugene, thank you your visit my channel and your comment. I do not believe that the bird winds, especially, large birds wing not just act as an airfoil. In the air plains jet engine or propeller crates a thrust, so that air plain can fly. Air plain wings always laying down, but they will never fly without thrust. Bird wings and feather are very elegant solutions to the flight. No flaying animal whether its a bat or insects can escape being a pray to the birds. Because their flight mechanism is much superior. I suggest you should read the book Otto Lilienthal father of gliders write about birds. Bird-flight as the Basis of Aviation.
Trevor thank you for your visit and comment. I guess this is more difficult to build than regular ornithopter. I am not good designer, I tried it once and failed to build it. I am looking forward someone more experienced in the design and do it.
You're welcome. Thank you for the presentation and the knowledge shared. Generally yes, I suppose it would be more difficult than a regular design, but I think the potential exists. I've no experience in the matter myself though.
I think that the bird flight is more complicated than an airplane flight. For example I spent five years of my life to do computational simulation of aircraft wing tip vortices during my PhD thesis. Same phenomenon explains why birds fly in V formation. I do not know which part of bird flight you are going to concentrate? Gliding, taking-off, landing, hovering and wing flapping? All of them are important and most people think that birds fly just like airplanes. But, the bird flight much complicated than that. Bird can land and take off from one spot by not consuming a lot of energy. Harrier, jets do that, but amount of energy is a lot.
What you are describing is very complex analysis. I really don't know where to start. I am not following new developments in CFD field almost 24 years.
As far as I know Otto Lilienthal who is considered as the father of gliders done extensive research on the bird flight. My animation based on an image from his book. However feather arrangements in that image was wrong. I am sure an artist rendered image wrong and Lilienthal did not pay attention to that small detail. In short I may say that it was Lilienthal who first studied the subject scientifically. However I do not know who noticed feather arrangement first. Even some old roman eagle figures show correct feather arrangements.
well, im in the business of hybrid batsuits ... type in "ornithopter with feather arrangement" and see what i mean about how i guess were a ways off from civilian development.. lol, your video does come up tho
maybe this scientist isn't a religious person.. but how birds just a coincidence or selection from nature, fish, all animals .. even a mosquito or a fly... this video we see .. we see it because someone did press upload.. Fod or Allah is the creator.. it's sufficient that we are here each our amazed by his creation.. of you don't agree with me try to creat a frog or even a plant ... the say nature .. but god / allah created it .. with all respect and thank you for you effort
Have they never noticed the birds how they are held under control in the middle of the sky, where none holds them (from falling) except Allah? Surely there are signs in this for those who believe. Quraan Surah al nahl 79
Best of UA-cam. Thank you. Bob Ross loves you.
Thank you, I really appreciate your nice comment.
I just watched a video on human powered ornithopter, and I wish they had seen your video, because their upstroke was so inefficient. I dream to ride in a small engine powered ornithopter, and I really believe that the feather angles you refer to are critical. I want to flap and glide, nice and easy, without the frenetic flapping of rc ornithopters. Be well, love from LA
kustomweb .
i know Im asking the wrong place but does any of you know a trick to log back into an instagram account..?
I was dumb forgot my login password. I would love any help you can give me!
@Callum Emery instablaster :)
Absolutely amazing. You just answered all of my questions and more. Thank you so much for posting this.
Thank you for this, I was looking to see if I could make a mechanical bird sculpture and this helps a great deal. I think we can look at things and easily take them for granted, as you say the wing profile is probably perfectly well understood by ornithologists but as a casual observer I would bet that the quill was closer to the body than the wing tip. You did well to observe the feather construction/layout from the photograph. Your analysis makes perfect sense.
Kind Regards … Andy
-Speed of gears
-Elastic bands on the wing joints
-real feathers
-32x 180 degree joystick-like mechanisms (feather spread)
-2 x180 degree joystick-like mechanisms (individual wing shrug)
-triangle-point gears (circular roration) for wing shrug
It would help if I knew what the bones were called.
Thank you for your visit and your nice comment. I use Adobe Flash for my animations.
I've seen other videos where people said each feather is like an airfoil. That's silly. I like yours much better that explains how they work in concert, as a system, all the way down to the barbs. Yours is the clearest explanation I have found. Thanks!
Thank you for your nice comment and visiting my channel.
this is an amazing video. taught me how birds and planes fly using the same concept. i cant believe i found this video so late in life. thank you.
This is everything I wanted to know about bird flight in one video....great insight !!!
Thank you for your visit to my channel and nice comment.
That is the question I am asking myself. I saw a Japanese patent application that proposes a wing flapping airplane, unfortunately it use blue feather arrangement which will not fly at all. Actually to implement this concept is extremely simple, but unfortunately I do not have a plane to test my idea. I hope one day someone will try this idea.
Did you got it 7 years later? 😂
@@josepmavila2890 No, I did not.
@@mekanizmalar Damnit!
Found this invaluable for 3d animation, to use as a reference etc. thank you!
Thank you, I appreciate it.
Andy, Thank you for your nice comment, I appreciate it.
This video is of incredibly high quality, amongst those I found in search for 'bird flight mechanics'.
Finnaly! detailed nice explanation in the ocean of oversimplyfied kid video. thank you!
I would love to design a 3D print with all of yours and Otto Lilienthal findings. Great stuff and extremely good and clear explained, thanks.
Thank you for your support and encouraging comment. I would like to see your 3D print pictures of this if you do it.
This is SOOOOO helpful for my next project . Thank you !
Wow that was fast! Thanks a lot, your videos are great!
Hi,
I like that you've broken down the effect of feather configurations on airflow around the wing. This is quite a helpful tool. However, birds travel within the incompressible flight regime, so the animation of particles is misleading. It shows there being variable density beneath the wing, which you refer to as "supercharging." I believe that what would happen in reality is that there would be a region of higher pressure under the positive configured wing on downstrokes rather than higher density. (It may even just be that there is a marginally higher pressure beneath the positive wing than the negative wing). This, in turn, would change the motion of particles as they are displaced to maintain constant density. So while this animation helps visualize the effect of airflow direction, it could use a bit of rework to account for the incompressible assumption (i.e. it is the differential pressures and velocities that increase flapping efficiency not extra air atoms).
extra air means extra charge (all matter recycles charge, ie real physical photons), i would say it does help lift.
Why Dont I get teachers like this ??? You Tube should have existed during my School Days!! Just WoW
Thanks. I learned a lot from UA-cam too.
You are very good observer. the statement I mentioned there is not wrong, but it would be better, if I said, In real bird tip feather fully visible, but the blue one it is not. What happens, when the red birds closes its wing, tip feather stay inside the wing. For the blue bird it stays outside. Does this explanation makes it clear?
This video was fascinating. Thank you.
amazing you gave me the exact informations i need thanks
This is genuinely awesome
Yes, They act as Flapper. Apparently this is well know fact, but I did not know that up to a month ago. 7 years ago I did a patent application in which I proposed this flap action without knowing birds were doing it. Actually, flap turbine come from that idea. Yes, ornithopters should do it, but apparently they miss this crucial step and why most of them fail or produce inefficient flight.
Excellent video! I completely understand it now! But you’re actually saying the ‘maximum angle’ of the feathers also matters in the flight efficiency?
Thank you so much for this video, very educational!
+stop4stuff Thank you for your visit and nice comment.
Very informative! Thanks for sharing.
This was so cool to watch and very informative
I found a feather outside today, the small scraggly whispery tufts closest to base looked like they would pull significantly more drag at the base of feather than it would at wingtip. it’s elongated concave shape cups and angles the air down the length of the feather sort of like a channel on top of the feather rotation to reduce drag on upstroke, the 2D rendition of the wings really lacks the mobility and thus the action of bird wing-power. But the animation is still wrong I’m sticking to it.
I noticed birds use their tail feathers as both an elevator, and an additional lifting surface. under the positive feather/red bird model, the wings push air underneath the tail, making it more efficient - the same way an aircraft horizontal stabilizer responds better/generates additional lift if it is in the prop wash.
your model also perfectly explains how birds achieve roll stability, as seen in high wing aircraft with anhedral wings. using positive feathers, the wing that rolls down (due to wind, turbulence) will see a greater angle of attack than the wing that rolls up. therefore the down-rolling wing will generate more lift, restoring the bird to roll-stable level flight.
the negative feather/red bird will do the opposite - rolling further into the direction it got pushed by the wind, making it waste more energy.
now, would you happen to know how birds go about doing vertical stabilizers/rudders using their feathers in positive configuration?
are they using their wing tips as split-rudder ailerons/air brakes to slow down one side (as on a B-2 bomber)?
actually - with the negative feather/***blue bird model (typo on previous comment), if wind pushes the bird to roll to one side, the downward wing will get air flow separation and stall, while the upward wing would get more lift.
it would be very easy for the bird to go into an unrecoverable roll. evolution would not let such a thing happen :)
thank you for this detailed mechanical animation.
Thank you for your very informative video. Working on animated birds it is crucial that we understand the movement down to the smallest detail.
Best explanation ever
Wow explanation.
I got my answer more than I expected.
Thank you for your visit and encouraging comment.
That was super informative, thanks!
this is really helpful.. thanks a lot for uploading this video.... can you explain the body mechanics of how a bird takes a turn?
Thank you for your nice comment. The turning mechanism of the bird is combination of tail and the wings motions. I am planning to prepare a video about bird tail motions.
+mekanizmalar that's great.... it will be really helpful
새가 나는 물리적 매커니즘에 대해 책을 쓰려고 아이디어를 정리하는 중인데, 이 영상이 몇 가지 영감을 주었습니다. 고맙습니다.^^
Thank you for your nice comment.
Would it be possible to make an RC ornithopter with this wing structure in mind? It might be a good tool to use to measure the efficiency of the wing. David Lentik used a box with instruments and trained birds to fly in it in order to measure the lift of a bird in flight if we made 2 RC's one with a traditional wing and one with a wing designed like a birds we could probably get some good info on it.
I try to build one and I failed. Even Festo's bird does not fly like a bird.
Thank you a lot for this video. It was great, I was having trouble with a modell of bird flight and I couldn´t see my mistake
I am glad that it helped.
Wow! I need this video! God hears me !!!
Thanks for your nice comment.
Thank you for your visit. Forgive me for late reply. I am glad that you find what you are looking for.
Interesting view, but it's missing a good few phenomena and arrangements in bird flight. For instance, you only consider the feathers, and show the wings as generally static from head to tail, while the real movement is also a complex pushing movement towards the rear, not only a downward stroke, with interesting effects on the drag when the wing tips are ahead. Also, you should consider the body as part of the supporting surfaces, as with the bumblebee (they do fly, whatever calculations state... or, more precisely, they surf on 3D wind vortex they create with their fast wings that act more like propellers than wings). Read NASA's book "sweeping forward" (it's free) and look at the ground effect, there are a lot more clues than simply opening the feathers on the frontward-upward stroke.
Dear Regis, I agree with you that bird flight is very complex phenomenon. For example while Gulls flap their wing much simpler up and down stroke, the Hummingbird flight is more complex, more like insects than birds. Also I now the expression "According to aerodynamics principles, bumble bee should not fly, but bumble bee does not know aerodynamics and that is why it flies." I also know effects of ring vortex on flight, because it was part of my PhD thesis. In my animation I just wanted to emphasize importance of feather in the flight. Opening and closing of feathers are important portion of flight but there are many arrangement in birds body which makes it perfect creature for the flight. However, if there were no feathers birds could not be supreme flier. Nature invented many organs for different creatures in many form and shapes. But it invented the feathers only once.
@@mekanizmalar Totally agree on "many organs", not so much on feathers. I suspect the variety in feathers in shape and size make it a set of principles, not a single "invention".
Now, from the efficiency point of view (we're talking dissipated energy here), birds are not the supreme fliers, not evel the owls (the very impressive silence of the flight suggests no energy is lost, but it doesn't make it the most efficient yet), it's well known to be the bat, no question about it. It's a mammal (egg layers are proven to be on the complete other side of evolution) and there are no feathers.
Now, I'm amazed with your explanations on the orientation of feathers, and I'm trying to think of a(theoretical) way to implement it in an ornithopter-style thing. How would you make sure to be fully-open on the upward stroke and fully closed on the downward stroke (simplifying a lot, sorry)? Would you rely on gravity alone (that involves more weight, right?), or slats with a concave face down/convex face up, or even weak-enough springs (requires more torque to open the slats)? Did you go further at some stage and made a real-world model of this principle? All ornithopter models I can find on UA-cam use a simple thin plastic layer (likely LDPE) and only rely on the movement of the wings to fly.
I find that the flows bring air over the tail makes a lot of sense. Air flow over the red bird's tail reduces drag of the tail and makes it more effective for its size. Humans design power flight and boats, to have control surfaces in areas of high flow to increase control effectiveness while reducing control size which minimizes drag.
Amazing ! thank's . Great job. ❤
the question is why the hell all the ornithopter i saw non of them used the feather mechanism the just put a solid peace ofter the wings witch doesn't help with the drag on the up mouvment of the wings
Thank you so much , but I want to know can I get those animations on any website ?
Wow. So informative. Are the feather openings controlled by pair of muscles?
I know that birds have extraordinary capabilities to control features. However, I do not know whether they handle flight feathers or not. Since the feater shaft is oof center, enough for opening and closing gabs between feathers.
Great explanation thanks
i think that rc ornithopters doesn't have all of this moving feathears because it will add to much weight for its wings that should be the lightest as possible, do you think it can be a good reason for that
Firstly, I would like to thank you for bringing up the topic
You are talking about the flight movement of the (dynamic) bird, but there are many things that are interconnected, not only the bird's feathers - the lung, nerves and many things in the bird's body to reach the amazing flying stage. There is no blind nature that can create a bird with this amazing design. There is a creator of this universe which is God
Please see scientific sources from several scientists
on UA-cam : (Flight: The Genius of Birds )
Interesting. Saving to watch again later
I think I can pass my test now, THANK GOODNESS. ~ THANKS!
Thank you for your visit and nice comment.
Great video, thanks for sharing. whats the animation software you use, like the one in this and the video on turboprops? thanks
Yes. This is the key. I’m also curious to know.
Really fascinating, thanks for creating and narrating this! 😀
Thank you for your visit and your nice comment.
Excellent explanation.
yeah im hoping more 3d artist make more. i love messing around with this stuff lol :B
muhteşem açıklama. teşekkürler!
BEgendiginiz icin cok memnun oldum. Tesekurler.
Highly informative
Drar Joshua, thank you for your visit to my channel and nice comment.
wow!!! incredible!!! amazing!!!
thanks by this excellent post!!! thanks!!!
+Cesar Marinho Thank you for visiting my channel and your very supportive comment.
hi sir,
can you tell me this is which software you have used to perform aerodynamic analysis?
I have tried ansys fsi with system coupling of transient structural and fluent but could not succeed
Thanks for your visit and comment. I use Adobe Flash for my animations.
I have a presentation coming up in my ornithology class. Would it be ok with you if I use some of the information and animation in this video.
could you send me the name of the book from which you got this information?
I'm animating a griffin, this helps me to learn how to animate wings
Thanks for the video you just gave me a ideal
This is amazing.
i think the reason that we see only the red kind that the open spots in the feather in the red kind goes in the direction under the body part because the body part is the heaviest that air flow or pressure will work against the gravity which is gonna make the body feels lighter but if u imagine it with the blue one the air flow or pressure will go away to the side which is gonna focus the pressure at the side which is not going to help as the red one does .
+O Okba Didn't I mention similar stuff in my video?
nope
Do birds use some type of “drag” on the wing to turn left or right the way planes use ailerons?
Bird flight is a very complex task. I guess birds use their tails to accomplish right or left rotation by just arranging their tail angle accordingly. However, I see birds change direction without a tail. I think they use their wings to do that. However, the tail gives the bird more control to make a turn.
@@seyhanersoy8989
Thanks for reply.
Yes, majority of birds might use tail for left or right or use a small portion of their wings to create just enough drag to turn.
I find it interesting how a bird doesn’t have the need for the use of a tail like a plane uses to fly straight. Planes do use a elevator section if it’s tail to move up or downward but a bird doesn’t technically have a vertical back tail.
Maybe it’s a Birds tail is dual usage like a bonanzas V-Tail combines both elevator & rudder in one area.
does size of birds matter with there speed of feathers
Dear Amit, Bigger the bird, slower it is wing flapping and visa versa. Therefore the small birds flap their wing faster. This means that wing feather opening, closing will be much faster. In short air will pass true in between feathers during upstroke. As long as shaft of feather wing are off center, this event will be true.
Thanks
Well done 👍👍👍
Thank you for this nice explanation.
Thank you for your visit to my channel and your comment.
so basically the blue bird swims I the air while the red bird creates it own energy and force to propel itself forward
Thank you for your visit and comment. Both blue and red bird can fly.. However, takeoff from ground would be very hard for the blue bird. Cruising flight for blue bird would be very inefficient. in short, the chances of the blue bird competing with the red bird would be slim.
don't know why the feck i'm watching this but it's interesting as hell.
I disagree with you conclusion and think the explanation is much simpler:
The feathers at the tips need the keel to be on the front in order to be stable in the oncoming air. They need to be a miniature version of a wing. This is only really possible with the load bearing element towards to leading edge.
Thanku so much for this techniq
Can the red birds generate the same amount of lift between when their wings go upward and downward?
The animation tells me almost the same. i'm a little confused.
In one complete cycle, up and down, red bird generate more lift during take of than the blue bird, since it fills underside of its body with fresh air, while the blue bird does not. During the cruising flight generate same amount of lift, however blue bird experience more drag. This is because the red bird directs the air particles to fill the vacuum behind it, while the blue bird does repels the air particles outward, which causes more drag. In short, the red bird creates more lift during take of and less drag during cruising flight, while the blue bird creates less lift and more drag respectively.
coolest linking mechanism i ever saw
clear explanation
Nice explanation
PERFECTO ..FELICIDADES GRACIAS
Thank you for visiting my channel and your encouraging comment.
ALLAH is great GOD the great creator with with great wisdom سبحان الخلاق العظيم
Teşekkürler
Benim icin bunu yapmak bir zevkti. Begendiginiz icin tesekur ederim.
Seyhan Ersoy Hocam Nerdesiniz? :)
Ben Amerikada yasiyorum.
ben niye burdayım bilmiyorum ama hello
10/10 thank you!!!!
Thank you for your encouraging comment.
during molt some feathers create gabs..but the bird is still able to fly.
I want to build the wings to fly
Nice attempt to explain the bird's flight. The only problem - it has no connection to reality. Birds' wing mechanics is principally different, it never fights to the air, always laying down to the air, even in the upper part of the flapping cycle.
Dear Eugene, thank you your visit my channel and your comment. I do not believe that the bird winds, especially, large birds wing not just act as an airfoil. In the air plains jet engine or propeller crates a thrust, so that air plain can fly. Air plain wings always laying down, but they will never fly without thrust. Bird wings and feather are very elegant solutions to the flight. No flaying animal whether its a bat or insects can escape being a pray to the birds. Because their flight mechanism is much superior. I suggest you should read the book Otto Lilienthal father of gliders write about birds. Bird-flight as the Basis of Aviation.
This is the key to an efficient ornithopter design.
Trevor thank you for your visit and comment. I guess this is more difficult to build than regular ornithopter. I am not good designer, I tried it once and failed to build it. I am looking forward someone more experienced in the design and do it.
You're welcome. Thank you for the presentation and the knowledge shared.
Generally yes, I suppose it would be more difficult than a regular design, but I think the potential exists. I've no experience in the matter myself though.
I want to do theoretical analysis on bird's aerodynamics
any suggestion
I think that the bird flight is more complicated than an airplane flight. For example I spent five years of my life to do computational simulation of aircraft wing tip vortices during my PhD thesis. Same phenomenon explains why birds fly in V formation. I do not know which part of bird flight you are going to concentrate? Gliding, taking-off, landing, hovering and wing flapping? All of them are important and most people think that birds fly just like airplanes. But, the bird flight much complicated than that. Bird can land and take off from one spot by not consuming a lot of energy. Harrier, jets do that, but amount of energy is a lot.
I want to perform the aerodynamic analysis of the wing flapping. so its a condition of moving boundary mesh.
I want to perform the aerodynamic analysis during take off and flapping. so can you please suggest me how to do so?
What you are describing is very complex analysis. I really don't know where to start. I am not following new developments in CFD field almost 24 years.
sir can you send me soft copy of your phd thesis?
It would be very helpful.
My mail id is biswajit346@gmail.com
when was this true feather arrangement discovered?
As far as I know Otto Lilienthal who is considered as the father of gliders done extensive research on the bird flight. My animation based on an image from his book. However feather arrangements in that image was wrong. I am sure an artist rendered image wrong and Lilienthal did not pay attention to that small detail. In short I may say that it was Lilienthal who first studied the subject scientifically. However I do not know who noticed feather arrangement first. Even some old roman eagle figures show correct feather arrangements.
well, im in the business of hybrid batsuits ... type in "ornithopter with feather arrangement" and see what i mean about how i guess were a ways off from civilian development.. lol, your video does come up tho
Very interesting.
which application is this?!
Adobe Flash
@@mekanizmalar thanks sir
HI , I want to ask a technical question but I need an email to send images
+Robo LOUtchinco my email is mekanizmalar at gmail dot com
Thank you.
super help full
Thank you.
How does it change directions?
Birds use their tails to change direction, however it is not whole story, it is also may use their wings for maneuver.
+mekanizmalar Thanks.
Incredible video which can be interpreted as evidence of Intelligent Design.
Intelligent design or evolution it is incredible design. Look all around and what you see is all incredible not just birds.
Thanks!
Nice
Clutch working
maybe this scientist isn't a religious person.. but how birds just a coincidence or selection from nature, fish, all animals .. even a mosquito or a fly...
this video we see .. we see it because someone did press upload..
Fod or Allah is the creator.. it's sufficient that we are here each our amazed by his creation.. of you don't agree with me try to creat a frog or even a plant ... the say nature .. but god / allah created it .. with all respect
and thank you for you effort
amazing
Thank you.
Nice Voice
+Charan Jaan Thank you for your visit and encouraging comment.
Have they never noticed the birds how they are held under control in the middle of the sky, where none holds them (from falling) except Allah? Surely there are signs in this for those who believe.
Quraan
Surah al nahl 79
What's about pinguins? Or African emus? 🤔