Oh Boy.This is a recipe for confusion. They start off with a Venturi which has nothing to do with lift generation and is one of the big myths! Lift is caused by turning flow.Turning flow is caused by angle of attack not wing shape If their lift explanation was correct supercritical wings wouldn't work, neither would. hang gliders Flat plates generate lift very well. (ever made a paper plane or flown a kite?) A curved plate has equal lift but less drag than a conventional aerofoil.
As a future aerospace engineer, I find the narrator's attitude towards equations around 2:10 hilarious. xD Math is awesome and fun, and it definitely makes stuff make more sense. :D That wasn't even a tough equation... They briefly introduce it in freshman physics for engineers. :P
I've said this before.... Bernoulli was a scientist, not a flyer. His theories are useful but not quite up to date. Check his birth and death dates! It's the difference in pressure gives lift, and there are several ways of achieving this. By the way, the Stealth Fighter only flies because of the alien anti gravity device discovered at Area 51.... a far easier explanation !!!!!
@josemontesp In practical terms an aerofoil generates lift by deflecting the oncoming air downwards, or towards the ground. An inverted aerofoil can do this but to produce a given value of lift a much larger angle of attack is required by an inverted aerofoil compared to a 'right side up' aerofoil. If you fly two identical aircraft level and alongside each other, one of them being inverted, the longitudinal axis of the inverted aircraft will form a larger angle with the horizon.
Can someone explain how is that LOWER pressure in the middle at 5:06 ? If they explained that margins have a larger volume of air then you would expect pressure to be higher when air is more compressed in the middle? What am I missing? Everything ?!
Look up Bernoulli's Law. For air moving on a streamline your dynamic pressure (speed), static pressure, and head (height difference) must add up to the same number. So if your dynamic pressure (speed) increase, your static pressure must decrease!
More recent articles I've read, suggest wings generate most lift by diverting air downwards
i.e Newtons law - equal and opposite forces - so volume of air diverted downwards equals force or lift upwards. The force generated by the reduced pressure above the wing due to increased airflow is apparently very small in comparison - interested to hear others thoughts on this ?
@EFCthebest I agree with your idea. A flat wing with no camber has maybe a lift/drag ratio of maybe 3:1. Put some camber on, and the L/D goes to 6:1.The first conclusion is: increased lift. I believe it is simply decreased induced drag.Obviously there will be slight reduction in pressure on the top of the wing because the inertia of the airflow NOT following the shape of the wing. It is well proven the massive reduction in drag caused by airfoil shapes to struts etc. This is ignored completely .
@EFCthebest the downward diversion of the airflow is the result of lift, not the cause. the cause is the difference in pressure between the upper and lower surfaces, generated by the difference in airspeed.
The explanation of wing lift is completely wrong and based on old myths. Wngs are not venturis, a symmetrical aerofoil or a supercritical one (curved on the bottom, flatter on top) which most modern aircraft have make the air go further on the bottom of the wing than on the top! It's a good thing we have movedon from this!
@nakedleader Okay class, now we will learn about inverted flight in a Tiger Moth...... and how does a fully symmetrical section work? It is rubbish to ignore the fact that wings can work upside down despite the theory! Just add power and incidence, to get more pressure under than over......
@SuperAviatar Absolutely! If you really want to mess with them, make a paper plane and show how flat plates are perfectly good at developing lift below about 13 degrees AOA.
Spend time listening to an instructor telling you about the air flow going the long way round the curved bit and the short way under the straight bit..... then ask how it works upside down...... drives 'em mad!
The movie emphasis the way the force is relayed to the wing too much, over where the force originates. in the end the lift originates in the displacement of air/mass, the resulting speeds/pressures are secondary effects.
the way lift is produced is not that particals pass over the wing and it's pressure's that is merely a little part of the equation. it is the direction of the after flow of the air leaving the wing, generally the air is force in a downwards motion off the wing and but newton 3rd law "for every action there is an equal and opposite reaction" therefore the downwards moving air pushes the wing up thus creating lift.
the way lift is produced is not that particals pass over the wing and pressure's, that is only a little part of the equation. It is the direction of the after flow of the air leaving the wing, generally the air is force in a downwards motion off the wing and but newton 3rd law "for every action there is an equal and opposite reaction" therefore the downwards moving air pushes the wing up thus creating lift.
What about the concept of downwash? This video only explains the general perception of how an aircraft flies. Quite understandable as this is a 1968 video when the understanding of aerodynamics wasn't advanced.
FAA now changed all these old concepts.. there is not such push up force... Please check the new aerodynamic books and disregard this video. It is WRONG on some concepts good luck.
This is GREAT. I'm sending this to friends as an example of FILM of that time; the narrator's dated accent and the MUSIC... the way people composed then for films such as this. / Kinda noteworthy how in 1968 very much during the the civil rights movement and the then-called "women's movement" they stocked the classroom with a variety of people. Commendable, IMHO.
To put all this simply, a plane flys using the venturi effect. As air speeds up, it's pressure drops. Lower pressure on the top (higher pressure on the bottom) of a wing will cause it to lift.
you can experience stall by playing gta san andreas using the same plane shown here by pressing w+down arrow quickly from the keyboard during takeoff. Its a 0 airspeed 0 altitude scenario.
hey at 03:48 seems wrong, why is the wing on top upright? is that what really biplane airfoil is? note that it cancels lift from below by the top airfoil
@jemhson no, that is not wrong. What the wind tunnel is showing is that air gets compressed when you have two airfoil shapes and that, even if you take one away, the same kind of effect happens. It is done to make more sense of how lift works because it shows how an airfoil acts like a funnel almost. Concerning biplanes, their wings are not like that. The airfoils are "upright" so to speak
This theory is outdated, the major causee of lift is the reaction of the bottom of the wing surface forcing air downward. The low pressure on the top helps a bit, but the most lift is because of the theory "every action has an equal and opposite reaction"
I'm no engineer, but I think you're right on the money. I don't think airplanes are sucked into the sky. Look at how much downwash a helicopter makes. It couldn't fly w/ neutral blade pitch.
I don't think they explain stall right either. The condition called "stall" is the loss of laminar flow w/ a significant increase in drag. That doesn't mean it stops producing lift tho. It's just the drag increases way beyond the thrust of most airplanes' engines ability to keep it up.
Thanks for the reply. I have read about this but I don't claim to be an expert. I've read enough to know there are many opinions among aeronautical engineers about what creates lift and exactly what stall is. Perhaps you can reccomend a resource.
newton's 3rd predicts good result only at hypersonic speeds(say @ mach 5 and above & higher altitude where the gas density is less) and the law is incorrect for lower speeds around 500mph and at lower altitude)
newton's 3rd predicts good result only at hypersonic speeds(say @ mach 5 and above & higher altitude where the gas density is less) and the law is incorrect for lower speeds around 500mph and at lower altitude)
@J1mmyWA Or is it. As one of my ground school teacher's put it, "If it is the law of equal and opposite reaction generating the lift, than put a pressure gauge or scale on the ground. Have an airplane or jet fly over it and see if it reads, at least near the same weight of the plane itself."
@111im222 hey man, that's great that your interested in flight! the major risks involved in flying are usually from " HUMANS " the plane itself has multiple systems in case one fails.( I am an aircraft mechanic so I know) feel free to ask anything you want about aircraft or engines in the future. P.S. do good in school if you want to make it in the aviation industry! L8R!!!
@shietalkr lol thanks and lol im a girl believe it or not! i am soo lucky because my grandpa is taking me to this plane place where i get to go in a mini plane so thats gonna be awesome! also, what subjects do u need to pass 2 be a pilot?
@homies2531 If you cut off the pointed ends its actually like the bricks were layed on which the swastikas were mounted. 20 years ago there were plenty such structures but all I knew of disappeared. I am searching for pictures of such brick formations. The reason is: Some buildings in the BND area in Pullach south of Munich are oriented in this way. The BND is the renamed 3rd Reich GESTAPO.
Search for Pullach Germany in Google Earth and look at the the north east part of Pullach.
Oh Boy.This is a recipe for confusion. They start off with a Venturi which has nothing to do with lift generation and is one of the big myths! Lift is caused by turning flow.Turning flow is caused by angle of attack not wing shape If their lift explanation was correct supercritical wings wouldn't work, neither would. hang gliders Flat plates generate lift very well. (ever made a paper plane or flown a kite?) A curved plate has equal lift but less drag than a conventional aerofoil.
completeaerogeek 7 hours ago
I Love The Video It Can Increase My Knowledge all » basic aerodynamics. Forces of lift, weight, thrust and drag are shown in relation to flight.
indiage 1 week ago
Good, I like that you share this video, I wish success always Department of Transportation Federal Aviation Administration
kelekokerupuk 1 week ago
ok now i don't feel like a total loser for not hitting the centerline.
epicwinface 1 week ago
This has been flagged as spam show
ive rode a plane twice and it feels so good to see the world freely...=)
iLOVENATURE2011 1 month ago
Sounds like a good traffic generater
adsvancer 1 month ago
Damn awesome!!!
Ruplustorie 2 months ago
thank u sir, i know little bit now :)
corksharif 2 months ago
As a future aerospace engineer, I find the narrator's attitude towards equations around 2:10 hilarious. xD Math is awesome and fun, and it definitely makes stuff make more sense. :D That wasn't even a tough equation... They briefly introduce it in freshman physics for engineers. :P
LaCeiba1924 2 months ago
Dewuxe, the word is 'inertia'
g1geo1g 2 months ago
that was awesome!!
REDmotionMike 4 months ago
The mechanics, and epicness of the fighter-jet....THAT'S the reason im going into the air-force! c ya in the skies!
SuperEzekial99 4 months ago 2
This has been flagged as spam show
at 11:05 he says something about air ressistance and air "inusure" *
what is this second word that he pronounces I can't understand it.
* = second word
Thanks in advance.
Dewuxe 4 months ago
Comment removed
Dewuxe 4 months ago
thank you for this!
whitedemai 4 months ago
I've said this before.... Bernoulli was a scientist, not a flyer. His theories are useful but not quite up to date. Check his birth and death dates! It's the difference in pressure gives lift, and there are several ways of achieving this. By the way, the Stealth Fighter only flies because of the alien anti gravity device discovered at Area 51.... a far easier explanation !!!!!
SuperAviatar 4 months ago
So, how does it generates lift an acrobatic plane during invert flying? According to Bernoulli's Law it is suppose to lift it down or not?
josemontesp 5 months ago
@josemontesp In practical terms an aerofoil generates lift by deflecting the oncoming air downwards, or towards the ground. An inverted aerofoil can do this but to produce a given value of lift a much larger angle of attack is required by an inverted aerofoil compared to a 'right side up' aerofoil. If you fly two identical aircraft level and alongside each other, one of them being inverted, the longitudinal axis of the inverted aircraft will form a larger angle with the horizon.
bravobravo74 4 months ago
why cant things be this easy nowadays! lol
therabbit0 6 months ago
the best video instruction I've ever seen
Zbychoslaw 8 months ago 3
women flying a plane.. HAH
killedbyassassin 9 months ago 9
@killedbyassassin it is safer that women fly because they are better than robots flying
meterdatamanagement 8 months ago
Good video, refreshed my mind about airplanes.
hijolhardy 9 months ago
When you see the ending music and font, don't you want you watch some Tom & Jerry ? :)
adrianTNT 9 months ago 4
Can someone explain how is that LOWER pressure in the middle at 5:06 ? If they explained that margins have a larger volume of air then you would expect pressure to be higher when air is more compressed in the middle? What am I missing? Everything ?!
adrianTNT 9 months ago
@adrianTNT
Look up Bernoulli's Law. For air moving on a streamline your dynamic pressure (speed), static pressure, and head (height difference) must add up to the same number. So if your dynamic pressure (speed) increase, your static pressure must decrease!
notzaarsa 9 months ago
@adrianTNT static pressure is lower while dinamyc pressure is higher. We need lower static pressure!
MrFlyerx 5 months ago
Think this is out of date
More recent articles I've read, suggest wings generate most lift by diverting air downwards
i.e Newtons law - equal and opposite forces - so volume of air diverted downwards equals force or lift upwards. The force generated by the reduced pressure above the wing due to increased airflow is apparently very small in comparison - interested to hear others thoughts on this ?
EFCthebest 10 months ago
@EFCthebest You are correct.
raycod84 9 months ago
@EFCthebest I agree with your idea. A flat wing with no camber has maybe a lift/drag ratio of maybe 3:1. Put some camber on, and the L/D goes to 6:1.The first conclusion is: increased lift. I believe it is simply decreased induced drag.Obviously there will be slight reduction in pressure on the top of the wing because the inertia of the airflow NOT following the shape of the wing. It is well proven the massive reduction in drag caused by airfoil shapes to struts etc. This is ignored completely .
winterka100 5 months ago
@EFCthebest the downward diversion of the airflow is the result of lift, not the cause. the cause is the difference in pressure between the upper and lower surfaces, generated by the difference in airspeed.
eugeniobb 4 months ago
learning to fly was one of humans most noble and pure dreams throughout history. somehow we then decided to make this noble dream into weapons.... :(
Riggro 10 months ago
@homies2531
>.<
justme141996 11 months ago
The explanation of wing lift is completely wrong and based on old myths. Wngs are not venturis, a symmetrical aerofoil or a supercritical one (curved on the bottom, flatter on top) which most modern aircraft have make the air go further on the bottom of the wing than on the top! It's a good thing we have movedon from this!
nakedleader 1 year ago
@nakedleader Okay class, now we will learn about inverted flight in a Tiger Moth......
SuperAviatar 11 months ago
@nakedleader Okay class, now we will learn about inverted flight in a Tiger Moth...... and how does a fully symmetrical section work? It is rubbish to ignore the fact that wings can work upside down despite the theory! Just add power and incidence, to get more pressure under than over......
SuperAviatar 11 months ago
@SuperAviatar Absolutely! If you really want to mess with them, make a paper plane and show how flat plates are perfectly good at developing lift below about 13 degrees AOA.
nakedleader 11 months ago
THANKS
shivukuderu 1 year ago
This helped me with my science fair And i got picked for rank 12 and got a B! thanks Uusually i get c- and c+ thanks
rox852456 1 year ago
Spend time listening to an instructor telling you about the air flow going the long way round the curved bit and the short way under the straight bit..... then ask how it works upside down...... drives 'em mad!
SuperAviatar 1 year ago
i love it and better still can understand it...welldone for finding this :)
heavisidelayer 1 year ago
The movie emphasis the way the force is relayed to the wing too much, over where the force originates. in the end the lift originates in the displacement of air/mass, the resulting speeds/pressures are secondary effects.
0MoTheG 1 year ago
This has been flagged as spam show
There is Trying to be naughty brides "benaughtyman.info"
bertynayomi 1 year ago
Well now a days a kid can learn how to properly fly a small plane & learn this.
Now anyone can fly & learn the physics of flying......
But the truth is that they probably don't know how to successfully navigate to a destination manually using old school technics...
pab4994 1 year ago
@pab4994 yeah dude, for sure they don't know how to navigate like, that's why it's called old...
That kind of info is for aeronautical engineers, not for cessna pilots lol.
elmunxa 1 year ago
Great video thanx
LTF85199 1 year ago
the way lift is produced is not that particals pass over the wing and it's pressure's that is merely a little part of the equation. it is the direction of the after flow of the air leaving the wing, generally the air is force in a downwards motion off the wing and but newton 3rd law "for every action there is an equal and opposite reaction" therefore the downwards moving air pushes the wing up thus creating lift.
TheC17A 1 year ago
the way lift is produced is not that particals pass over the wing and pressure's, that is only a little part of the equation. It is the direction of the after flow of the air leaving the wing, generally the air is force in a downwards motion off the wing and but newton 3rd law "for every action there is an equal and opposite reaction" therefore the downwards moving air pushes the wing up thus creating lift.
TheC17A 1 year ago
Joey, have you ever been in a... in a Turkish prison?
sikorsky26 1 year ago
What about the concept of downwash? This video only explains the general perception of how an aircraft flies. Quite understandable as this is a 1968 video when the understanding of aerodynamics wasn't advanced.
mohitgangrade85 1 year ago
FAA now changed all these old concepts.. there is not such push up force... Please check the new aerodynamic books and disregard this video. It is WRONG on some concepts good luck.
Dithel 1 year ago
@Dithel yet i,ve seen the other ideas and videos and they seem to contradict each other. i,m sure if you know, it,s easy to understand.
userwl2850 1 year ago
why not say pushed up, it makes more sence then lift.?
userwl2850 1 year ago
Great film!!
microdon2 1 year ago
Awesome.
shivrajvishnu 1 year ago
Runway 31/13... you don't see that too often... Great post!!!! MUSIC IS CLASSIC IN THESE OLD VIDEOS!
ClearedToLand7 1 year ago
This is GREAT. I'm sending this to friends as an example of FILM of that time; the narrator's dated accent and the MUSIC... the way people composed then for films such as this. / Kinda noteworthy how in 1968 very much during the the civil rights movement and the then-called "women's movement" they stocked the classroom with a variety of people. Commendable, IMHO.
negativewashout 1 year ago
See my comment in a related video titled "How Airplanes Work" for a thorough explanation for how an airfoil works to create lift.
celticwiz10 1 year ago
To put all this simply, a plane flys using the venturi effect. As air speeds up, it's pressure drops. Lower pressure on the top (higher pressure on the bottom) of a wing will cause it to lift.
salemcripple 1 year ago
Bernoulli's principle.
sexcation 1 year ago
Qantas, $300 charge to cancel a booking and 12 weeks to process. Thanx, Fly Emirates
Ryzler13 1 year ago
Awesome. Thank you for posting so many AWESOME videos!
hmbpnz 1 year ago
Nice video. Thanks for posting.
shivrajvishnu 1 year ago
how i wish i am pilot too.. ^_^
lunamoth12 1 year ago 14
@lunamoth12 then be a pilot, cost about $30'000, a school in Houston, Hitech aviation will complete you in 8 months.
rolandjude 1 year ago
@rolandjude that is the problem. ^_^
lunamoth12 1 year ago
@lunamoth12 You should get Microsoft Flight Simulator X
FsimulatorX 11 months ago
@lunamoth12 stop wishing a go be one!
rambocivilairpatrol 2 months ago
watch her sex tape at b00btube . C(0)M
Nauss18 1 year ago
sağol ciğerim
güzel video
canseren 1 year ago
hey there's a black guy!!! awesome (aka I'm not the only one)
RBG02005 1 year ago
hello the corect ans to ? is, air plane fly bq have wings
pavelavietor1 2 years ago
This is so retro! Thanks.
Ipfree549 2 years ago
you can experience stall by playing gta san andreas using the same plane shown here by pressing w+down arrow quickly from the keyboard during takeoff. Its a 0 airspeed 0 altitude scenario.
jemhson 2 years ago
hey at 03:48 seems wrong, why is the wing on top upright? is that what really biplane airfoil is? note that it cancels lift from below by the top airfoil
jemhson 2 years ago
@jemhson no, that is not wrong. What the wind tunnel is showing is that air gets compressed when you have two airfoil shapes and that, even if you take one away, the same kind of effect happens. It is done to make more sense of how lift works because it shows how an airfoil acts like a funnel almost. Concerning biplanes, their wings are not like that. The airfoils are "upright" so to speak
TheSoarer151 2 years ago
This theory is outdated, the major causee of lift is the reaction of the bottom of the wing surface forcing air downward. The low pressure on the top helps a bit, but the most lift is because of the theory "every action has an equal and opposite reaction"
J1mmyWA 2 years ago
@J1mmyWA
I'm no engineer, but I think you're right on the money. I don't think airplanes are sucked into the sky. Look at how much downwash a helicopter makes. It couldn't fly w/ neutral blade pitch.
I don't think they explain stall right either. The condition called "stall" is the loss of laminar flow w/ a significant increase in drag. That doesn't mean it stops producing lift tho. It's just the drag increases way beyond the thrust of most airplanes' engines ability to keep it up.
deezynar 2 years ago
Just changed my password because I didn't leave the original comment!
J1mmyWA 2 years ago
@J1mmyWA
That's interesting, the other Jimmy must have quit YT & left his screen name for someone else (you). Sorry for bothering you. Take care.
deezynar 2 years ago
@deezynar not even, read up on your lift properties a little more.
shietalkr 1 year ago
@shietalkr
Thanks for the reply. I have read about this but I don't claim to be an expert. I've read enough to know there are many opinions among aeronautical engineers about what creates lift and exactly what stall is. Perhaps you can reccomend a resource.
deezynar 1 year ago
Comment removed
sivachand666 1 year ago
@J1mmyWA
newton's 3rd predicts good result only at hypersonic speeds(say @ mach 5 and above & higher altitude where the gas density is less) and the law is incorrect for lower speeds around 500mph and at lower altitude)
sivachand666 1 year ago
@J1mmyWA
newton's 3rd predicts good result only at hypersonic speeds(say @ mach 5 and above & higher altitude where the gas density is less) and the law is incorrect for lower speeds around 500mph and at lower altitude)
sivachand666 1 year ago
@J1mmyWA Or is it. As one of my ground school teacher's put it, "If it is the law of equal and opposite reaction generating the lift, than put a pressure gauge or scale on the ground. Have an airplane or jet fly over it and see if it reads, at least near the same weight of the plane itself."
boldtymecountry 1 year ago
where could get this vid???
DjMaC1234 2 years ago
hey where could i dowload this video????
DjMaC1234 2 years ago
This video was very helpful, Im taking ground school right now and I had a hard time understanding what angle of attack was
THANKS
ARandomCanadian 2 years ago
uhhh sorry but this vid makes me sleep...
gustavo87467357 2 years ago
Thanks for uploading! Very interesting and educational. Has really helped increase my understanding lift and the other aerodynamics.
skinyboi2 2 years ago
This video was the first video i ever watched at my local aeroclub where i started my Pilot License!
stewy1100 2 years ago 22
@stewy1100 well i am 10 and i have always wanted to be a pilot tell me the risks and about flying plz
111im222 1 year ago
@111im222 hey man, that's great that your interested in flight! the major risks involved in flying are usually from " HUMANS " the plane itself has multiple systems in case one fails.( I am an aircraft mechanic so I know) feel free to ask anything you want about aircraft or engines in the future. P.S. do good in school if you want to make it in the aviation industry! L8R!!!
shietalkr 1 year ago
@shietalkr lol thanks and lol im a girl believe it or not! i am soo lucky because my grandpa is taking me to this plane place where i get to go in a mini plane so thats gonna be awesome! also, what subjects do u need to pass 2 be a pilot?
111im222 1 year ago
@111im222 well common sense 101, contradictory to its name its not that commom
hellkid94 1 year ago
@stewy1100 i watched this video at my Local aeroclub too in Brazil :D
Ragnarok03est 1 year ago
@stewy1100 same here at first i thought it was gonna be hard
homies2531 11 months ago
12:58 looks like a Nazi sign D:
homies2531 11 months ago
@homies2531 If you cut off the pointed ends its actually like the bricks were layed on which the swastikas were mounted. 20 years ago there were plenty such structures but all I knew of disappeared. I am searching for pictures of such brick formations. The reason is: Some buildings in the BND area in Pullach south of Munich are oriented in this way. The BND is the renamed 3rd Reich GESTAPO.
Search for Pullach Germany in Google Earth and look at the the north east part of Pullach.
wwwtotalitaerde 11 months ago
i'm loving these old flicks, keep 'em coming!
DaBrute 2 years ago
Thanks for uploading! certainly a really education one though it is in 20th century!
Btw, the video says. All forces must be imbalance ? or does it means, in- balance? can someone enlighten me please?
slionboy 2 years ago
I would say in blance.
jasleil 2 years ago
I would say, make your move by imbalancing forces, then you have to make them in-balance)
KoT6opuC 2 years ago
is this video meant for pilots are just anyone?
Minidrags 2 years ago
Anyone :)
TheCosmicFrog 2 years ago
this is great!
aviator147 2 years ago
Thanks so much for uploading. Do you have anymore? xD
aviationforever 2 years ago
"Lets bone up".....
den85nis 2 years ago