Bernoulli's Principle: How Planes Fly | Fast Forward Teachable Moments

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  • เผยแพร่เมื่อ 15 พ.ย. 2024

ความคิดเห็น • 51

  • @adams5381
    @adams5381 ปีที่แล้ว +25

    This is a great quick video! I would like to point out a few common misconceptions that were stated in the video though. Using Bernoulli’s principle to explain lift in airfoils/planes is tough since it’s not 100% accurate since it applies mostly to a single streamline. The fluid particles typically don’t meet up on the other side (trailing edge) of the airfoil since the air on the top surface is traveling faster than the bottom. One last thing is that the pressure difference between the top and bottom doesn’t cause the plane to be sucked up. The upper surface pushes down while the lower surface pushes up. Since the lower surface has a greater pressure force it causes the net force upward and causes lift. Besides those misconceptions, thanks for making educational content!

    • @keerthik9691
      @keerthik9691 ปีที่แล้ว

      I agree.

    • @EAGLEYES112
      @EAGLEYES112 ปีที่แล้ว

      Good.
      It's the initial low pressure caused to the air by the sloping edge that rapidly sucks series of oncoming air to flow faster over the surface in a stream.

    • @plqyqq
      @plqyqq ปีที่แล้ว

      good job

    • @EAGLEYES112
      @EAGLEYES112 ปีที่แล้ว

      I appreciated your willingness to clarify the misconceptions. However you didn't explain what in your opinion causes the lower surface to have a greater pressure force that results in a net upward force/thrust, know as lift.

  • @fredrikkuvaas7894
    @fredrikkuvaas7894 ปีที่แล้ว +24

    He said that the "lower" pressure sucks the plane up in the air, but this is wrong. It is the high pressure under the wing that pushes the aircraft upwards. Other than that, pretty good video

    • @micap1121
      @micap1121 6 หลายเดือนก่อน +1

      I know you're right, but why aren't those two complementary to each other? I never got that

    • @borats8043
      @borats8043 6 หลายเดือนก่อน

      @@micap1121 You could see pressure as tiny balls. Higher pressure, means more tiny balls. When balls hit some surface area it gives force to it. In a example of a plane, since in a lower wing there is higher pressure than in upside (balls in lower wing side hits more often than to wing thats in upside) thus gives force to go up. If you wanted to think in reverse it would not make much sense I think. That is a way, I think about, I dont know how correct it is

    • @h1forexltd953
      @h1forexltd953 2 หลายเดือนก่อน

      Thanks bro, he got me confused

    • @grahamj9101
      @grahamj9101 หลายเดือนก่อน

      The reduction in pressure above the wing is much greater than the increase in pressure below the wing. Fact. There are plenty of diagrams of the pressure distribution around a wing.

    • @grahamj9101
      @grahamj9101 หลายเดือนก่อน

      ​@borats8043 Using your analogy, the number of balls hitting the upper surface of the wing is reduced by more than than the number of balls hitting the lower surface is increased.
      But what really matters is that the wing is continually pushing a mass of air downwards. Isaac Newton rules OK. See my other reply and look for the videos.

  • @tejasripradeep8797
    @tejasripradeep8797 ปีที่แล้ว +5

    Wonderfully quick and simple. Thank you so much

    • @GPBEducation
      @GPBEducation  ปีที่แล้ว +1

      Glad it was helpful! Thank you for watching GPB

  • @ENTJ616
    @ENTJ616 ปีที่แล้ว +10

    This is why I love physics, small events that happen in our day-to-day life are translated in a way in which we can get a great invention.

  • @keerthik9691
    @keerthik9691 ปีที่แล้ว +3

    WOW! This was a good and informative video. I was excited to learn about the factors that contribute to lift. However, in my research of Aerodynamics by Babinsky and McLean, they suggest that the concept of Bernoulli’s Principle being the main contribution to lift is a misconception. They theorized that wing shape and deflection of airflow are more significant contributors. Nevertheless, I found the video to be an amazing breakdown of the complex theories of flight. Keep up the great work.

  • @Usermwaoeuw28181
    @Usermwaoeuw28181 ปีที่แล้ว +62

    bro this is litterly equal transit theory and is wrong

    • @youcrany
      @youcrany 6 หลายเดือนก่อน +6

      They’re not gonna pin or like this comment but it’s top comment lol and you’re right equal transit theory is incorrect

    • @MitchelleBlessingOtieno
      @MitchelleBlessingOtieno 2 หลายเดือนก่อน +2

      No it isn't you're the wrong one go back to your books kiddo

    • @Usermwaoeuw28181
      @Usermwaoeuw28181 2 หลายเดือนก่อน

      @@MitchelleBlessingOtieno www.grc.nasa.gov/WWW/k-12/VirtualAero/BottleRocket/airplane/wrong1.html#:~:text=The%20lift%20predicted%20by%20the%20%22Equal%20Transit%22%20theory,trailing%20edge%20before%20particles%20moving%20under%20the%20airfoil.

    • @jacobwolf1834
      @jacobwolf1834 2 หลายเดือนก่อน

      @@MitchelleBlessingOtieno This is a very wrong theory. Claiming that the air has to move a greater distance and therefore it speeds up is completely wrong and has even been disproven by nasa

    • @michaellee8815
      @michaellee8815 หลายเดือนก่อน +1

      Equal transit time theory maintains air has to meet AT THE SAME TIME. They don’t say that here. ETTT is a simplified and sort of crude version of Bernoulli and Newtons 3rd law. The video is right. We’re all impressed you took a physics class and think you outsmarted them; you didn’t

  • @yaglehoole5662
    @yaglehoole5662 10 หลายเดือนก่อน +5

    People, DO NOT let your kids watch this video.
    The charlatan is basically promoting the Equal Transit Time fallacy.

  • @keshavnarayan974
    @keshavnarayan974 11 หลายเดือนก่อน +2

    Bro finished my whole carrier

  • @Yourgray716
    @Yourgray716 ปีที่แล้ว

    Awesome video

  • @deepaliraval210
    @deepaliraval210 ปีที่แล้ว +1

    nice

  • @grahamj9101
    @grahamj9101 หลายเดือนก่อน

    Forget Newton's Third Law at your peril. A wing has continuously to deflect a mass of air downwards to produce lift. For a graphic illustration, take a look at the numerous clips of airliners flying through and over cloud. You can then discuss the aerodynamics and fluid mechanics, which produce this air movement. And don't forget, in the real world, it's the aircraft that's moving, not air flowing over a stationary wing, as in a wind tunnel.

  • @coledavidson5630
    @coledavidson5630 ปีที่แล้ว +9

    This is a misconception

  • @hmabboud
    @hmabboud 7 หลายเดือนก่อน

    @0:35 Lower total pressure or dynamic pressure?

  • @babyzette06
    @babyzette06 ปีที่แล้ว +1

    It is a mix of Bernoulli and Cuanda effect

  • @alexoman177
    @alexoman177 10 หลายเดือนก่อน +5

    This is an incorrect and an uninformative video. So, at least the incorrect information is barely spoken, without details.

  • @aaroncoulter3462
    @aaroncoulter3462 3 หลายเดือนก่อน +1

    @GPB Education. You all need to fix this video. You’re explaining it incorrectly.

  • @mitchgingras3899
    @mitchgingras3899 ปีที่แล้ว +4

    You've godda be kidding! Bernoulli's principal on aerodynamic lift, was debunked decades ago

  • @ririshow
    @ririshow 10 หลายเดือนก่อน

    Not so fast! Bernoulli's principle has long been considered as the only possible explanation for lift. Now some say this is wrong and suggest that Newton's principle is the right one. It is a divided topic.

  • @HankHarjes
    @HankHarjes วันที่ผ่านมา

    INCORECT! Bernoulli's Principal does not apply. Only works in a closed volume., Lift is generated by the wing deflecting the airflow downward, as in Newtons 3rd law of motion..

  • @k.chriscaldwell4141
    @k.chriscaldwell4141 ปีที่แล้ว +8

    Wrong! Bernoulli's principles/formulas have NOTHING to do with lift generation by an airfoil/wing. Nothing.
    Here is THE explanation of airfoil/wing generated lift.
    As an airfoil/wing moves through air, a perfect (very strong) vacuum is generated just at its top back surface. This vacuum diverts and accelerates the air downward along the airfoil/wing’s angled backside. This diverted air creates a low pressure area above the airfoil/wing that pulls down, “scoops,” and accelerates more of the air from above down and along the airfoil/wing’s backside.
    All of the scooped up and accelerated air is then shot off and DOWN the airfoil/wing’s trailing edge. The opposite and counter action to this is lift: Opposite and equal reaction. In some videos of large planes landing, this action can be observed in condensation formed in the low pressure area above and to the rear of a plane's wings.
    Therefore, lift is NEWTONIAN, not Bernoullian*. However, the low pressure formed as described does permit the use of mathematical approximations with Bernoulli formulas when designing airfoils/wings.
    The more interesting aspect of airfoil/wing generated lift is that the vast majority of the energy expended comes from gravity itself.
    *Remember as well, that Bernoulli deals with constricted flows of fluids.

    • @michaellee8815
      @michaellee8815 หลายเดือนก่อน +1

      It’s a combo of Bernoulli and Newton’s third law. Saying it has “NOTHING.” To do with it is absurd

  • @AhmadHassan-zr2mc
    @AhmadHassan-zr2mc 11 หลายเดือนก่อน

    Perfect 👍

  • @FlurpsIxoye
    @FlurpsIxoye 6 หลายเดือนก่อน

    Are we just completely ignoring the coanda effect?

  • @DonnieTheDino
    @DonnieTheDino 9 วันที่ผ่านมา

    Sigma

  • @mikhailyaremkiv
    @mikhailyaremkiv 5 หลายเดือนก่อน +1

    Incorrect

  • @johnh2410
    @johnh2410 7 หลายเดือนก่อน

    Oh really?! How, then, do airplanes fly upside down without get sucked into to ground???

  • @sankareverything6634
    @sankareverything6634 2 หลายเดือนก่อน

    Hi 0:35 0:35 0:35 0:35 0:35 0:35 0:35 0:35

  • @YumnaArrumy
    @YumnaArrumy 25 วันที่ผ่านมา

    9okm

  • @ReddhotOfficial
    @ReddhotOfficial 7 หลายเดือนก่อน +1

    Absolutely incorrect

  • @aram5642
    @aram5642 3 หลายเดือนก่อน

    THIS IS NOT TRUE.

  • @Saaurier
    @Saaurier 3 หลายเดือนก่อน

    loud and wrong! smh

  • @BlindSquirrel666
    @BlindSquirrel666 7 หลายเดือนก่อน

    Mostly and embarrassingly wrong.