How an Airplane Creates Lift | Complete PPL Ground Course (Lesson 2)
HTML-код
- Опубликовано: 6 июн 2024
- This video is lesson 2 in our Private Pilot Ground Course, which will prepare you for your FAA written exam. This is a very easy to follow lesson about Aerodynamics and how an airplane created lift. This video is easy to follow with very simple explanations of the basic aviation principles. We discuss Bernoulli’s Principle and Newton’s Third Law and how airplanes use these to create lift with relative wind. This training is intended to follow the aeronautical knowledge areas in Part 61.105 section b for single engine aircraft.
Buy OUR Cool Pilot Merchandise HERE: shop.spreadshirt.com/free-pil...
WATCH THE WHOLE SERIES HERE!
• Private Pilot Ground C...
Snatch up your Flying Eyes sunglasses here:
flyingeyesoptics.com/?ref=vk_...
10% discount with this coupon code:
FREEPILOTTRAINING
#privatepilotgroundcourse
#freepilottraining
my son is working as CFI already and I want to surprise him with my PPL soon, I guess I found how , THANK YOU A MILLION
You’re welcome! That’s awesome! He’ll be stoked
Great lessons josh, keep going you're great instructor.i love it .lesson 2 through.
Thanks!
Love your work mate, just flight siming it and targetting a discovery flight very soon @ 55yrs... Always been keen on flying, shoulda coulda woulda years ago but hey the passion is there, thanks again! 😎🤙🛩️🌅
Thanks! I’m stoked for you! You’re gonna love it!
Super helpful video, I appreciate you, definitely touched on the most important info in straight forward manner, Thank you!
You’re welcome! Thanks for watching!
I love this cz you are giving the practical knowledging in the end ,thanks
My biggest peeve with all ground schools is that you learn a bunch of information but they never tell you why you need to know it
This series is going to be very helpful for me!
Awesome!
I really appreciate what your doing , im completely new to everything and its awesome that you take the time to do this
You’re welcome!
Great lesson🤓🤓🤓🤓🤓🤓🤓🤓🇯🇲
Uplifting video
😂
I love this series and the lessons. Do you have quiz questions somewhere for each of these episodes?
I don’t. I hope to build an app at some point
that would be rad
Love everyone of your videos Josh ❤
Thank you! I appreciate that! I’m working on a really fun one right now 🤫 it’s called “5 Insane Landing Tips You’ve Never Heard”. Hopefully it does well 🤞
@@FreePilotTrainingcan’t wait to watch it!
Have you just updated the visuals on Lesson 1 & 2 or is there new information? Either way I liked both new lessons… I’ve almost washed out the last FPT shirt from wearing it so much & I’m about to purchase a new one…
I do like how you’ve added actual flight to the new videos…
Mostly new visuals, but I wanted to include some information that actually ties this information in with flying
Awesome! Love seeing my shirts around! Thank you so much!
I do like how you added actual flight to the videos…
Great job, if you had a PIP of the 6-pack zoomed in, perhaps witha dedicated camera, that would be the cherry on top.
Great feedback! Thanks! I’ll consider that for future videos
As always, Josh, another great quality video. Keep up the excellent work. Safe skies my friend 🇺🇸🛩️
Thanks Kevin!
Im glad to see youre doing these videos.
Question, i thought induced drag is reduced as speed increases, parasitic drag increases when speed increases?
Thank you
Thanks! Yes, induced drag decreases with airspeed, but you can also increase induced drag by increasing lift
@@FreePilotTraining except for the FAA in passing some type of test who cares about induced drag or parasitic drag, nobody absolutely nobody cares about that cuz that's not what you're thinking about when you're flying an airplane or even when you're planning to fly an airplane and Lord almighty you better not be thinking about that whatsoever especially when you're in a tight spot and you're just trying to figure out the best way to get the airplane on the ground in one piece.
@@christophergagliano2051there are many reasons to care about it. Here’s one: ruclips.net/video/9RpYWA_RwLE/видео.htmlsi=lU5IEBhMTJCDDxwa
@@christophergagliano2051These are important concepts we need to understand to control a plane.
@@Light_Of_Elohim first off, are you a pilot. And if so please explain how any knowledge of parasitic or induced drag enters into the mind of a pilot in any phase of flight that you can think of?
Super great and helpful videos bro! Appreciate! Anyway, is it late to begin this journey for becoming an airline pilot at age of 34?
You’re welcome! No way! It’s definitely not too late
How does a plane with symmetrical wings generate lift, it is all to do with AOA.
Decent videos. Engineer here. Newtons 3rd has literally nothing (like such an infinitesimal amount that it isn’t even used in equations) amount of effect that it isn’t worth putting on here. Someday when you do updates to videos, I recommend you strike that part entirely. Love the content you’ve put together overall !
Thanks Seth! I actually like reading comments like this. I’m not an engineer so it helps me find the best way to teach these things
Great video the only thing that was wrong it’s the not the high pressure that create lift it’s the low pressure on top of the wing it creates a suction effect like a vacuum
My training place doesnt have ground schol so this will be very helpful.
Awesome!
Why does the air on the top surface have to travel faster? What physically requires the air flowing over the top travel faster so that it can meet the air flowing along the bottom? The wing is not a venturi.
The wind on top must travel a farther distance than the wind on the bottom. This makes it move faster.
@@FreePilotTraining It seems like the wing creates more drag for the wind on top, wouldn't the air move farther, but just in a longer amount of time?
Nothing. And it does not even meet the air on the bottom, because the upper is even faster. The myth, that a longer distance somehow relates to the speed, however somehow sticks. The pressure distribution and connected with that the speed distribution is caused by the airfoil curving the airflow. If you take the picture about Newtons principles, the wind on the upper side is not depicted. If it was, you would notice that if the lines would continue straight, there would be no air at all everywhere behind the wing. So there is a low pressure area which makes the air follow the airfoil (unless the curvature is too much causing stall). The same is true on the lower surface. Air is not like bullets ricocheing from the surface. The curvature of the flow results in that higher pressure area. And yes, that pressure difference is the lift (all of it), yed, Bernoulli's principles makes the airflow on the upper side faster. But it is has nothing to do with some longer distance.
@@Haniel93This video needs to be removed.
@@MrAlwaysBlueI totally agree either remove it or correct it because it's a bunch of BS NASA's already chimed in on this, It might take the FAA a decade or two to figure it out lol
Holy crap dude, you took an already good video and made it great! This is amazing. Well done sir, and thank you.
Thank you so much!
isn't it "excess thrust" that causes the airplane to gain altitude?
from textbooks, lift is actually lower than weight when you are in a steady climb, no?
That’s part of it. But relative wind is the real culprit. That’s why wind shear is so dangerous. You can go from a headwind with tons of excess lift to a tailwind and then stall if you’re not flying fast enough
@@FreePilotTraining hmm.. not sure if I completely understand this
Also, I always thought the reason the nose goes up (and gaining altitude) when power is applied is because of something called "couple" where the thrust line is below the drag line, no?
My instructor told me that there is an airplane out there that is designed oppositely (thrust is above drag), so the nose actually goes down when power is applied! Is that true?
I just applied for my student license. I want to get the written exam out of the way before I go to fly
Awesome
technically doesn't the elevators create lift too, just downward?
Yes it does. The weight and balance video explains that more
Great series Josh!
The equal transit time hypothesis nonsense has already got too accepted, so if not too much work, I'd leave that out of this one. I know we all need this to be kept simple, short, and sweet, so would probably instead say something like the air has to travel faster due to the narrower diameter (of the flow,; easiest to consider above and below the wing separately and can paint flow lines) and the applicable principle to that + Bernoulli's principle. You can also point to a more complete, but harder to remember explanation, like for example this one: ruclips.net/video/ph1HqrioLPs/видео.html
Thank you! And I really appreciate the way you went about correcting me. I would love to replace the video right away, but I really need to knock out some other videos first. I’ll take a look at that video you sent and see if I can understand it enough to simplify it for a video
It's a little tough to simplify to be fair, because the exam expects you to involve speed & pressure of air with Bernoullis principle. As a friend of mine recalls even at MIT they don't deeply go into why the air moves faster, then just touch Bernoulli's principle from there. They teach that for lift you need to increase downward momentum of the air and airfoils can increase that downward momentum efficiently. They also add that equal transit theory is baloney.
So maybe the best is to say something like "we're not going into why the air travels faster above the foil to keep this short, but feel free to look into it" and just do like like they do.
Wow, nothing about the center of gravity being ahead of the center of lift. Requiring the stabilizer to hold the aft end down.
That explanation will be in the weight and balance video.
I can’t understand how does everyone explain the lift creation only this way, and forget about Coanda effect
It’s because this is the way you’re tested on the FAAs exam. When they change it, I will change my video
I've got it, thanks
@@FreePilotTraining you see, here in Ukraine we have the same principle for teaching pilots, but sometimes I can allow myself to speak about different variants, I know it doesn't help during the exams but can help during life.
By the way, thank you for everything you give on your channel, it is very good
The FAA will never use Coanda effect in a basic explanation of lift because it has absolutely nothing to do with how a plain airfoil generates lift in a freestream. You only get Coanda effect in special cases, for instance blown flaps, because it is an effect that happens when you blow a jet over the aerodynamic surface. At a push you might say the Coanda effect is present in the flow over a slotted flap because you have a jet exiting the slot (notwithstanding that the idea of the slot is to energise the boundary layer which is not quite the same as the Coanada effect).
@@FreePilotTrainingyou should also just state that this explanation is wrong, but the FAA wants you to know the sky is brown.
Wish I had this in my private training 😂this will be big I can tell
Thanks! I hope so!
same!
I hate to bust your bubble dude but there is no Venturi on top of the wing because there's no opposite side to create the acceleration you talk about
The video doesn’t say that, it’s says, “just like in a venutri” the upper surface of the wing speeds up the air…
@@FreePilotTraining Well you can't say it's just like in a venturi, because it's not just like in a venturi.
Can we at least agree that the air on top of the wing will follow the air on the underside of the wing?
@@christophergagliano2051 the point I’m trying to make is that “just like in a Venturi,” the air on top travels faster. It has to travel faster in order to meet the wind on the bottom side. This faster air causes lower air pressure. This is not my description, this is the FAAs description. That’s why I use it.
@@FreePilotTraining okay I got you, a word of advice, don't believe everything the FAA tells you is true. I've taken numerous required training classes put on by the FAA and they even tell you that not everything the FAA puts out is true.
@@christophergagliano2051 he just deleted my comment on "longer path, faster air speed, lower pressure" misinformation from another video, he is not interested in spreading facts, he is fine with "teaching" bs
One notch of flaps, nose pitched up and ended up climbing. Okay....but for some reason we were waiting to hear 2 things: center-of-gravity shift and also ballooning, no?
Initially yes, the aircraft will balloon. Technically the CG doesn’t move, it’s the center of pressure. You might like this video ruclips.net/video/tKNlFJ89wvA/видео.htmlsi=DaiklA4HyfL624ug
actually we could refer to the ground course made by MIT and the links are ruclips.net/video/edLnZgF9mUg/видео.html
Someone else just showed me that too. Good to know. Who’s better?
@@FreePilotTraining I like both but I will use your course sir, after that switch to MIT's course. I prefer your inflight scene BTW
Some of this is just plane wrong. A head wind does not increase lift. As soon as the wheels leave the ground a head wind only affects GROUND SPEED. A head wind shortens take off roll because the aircraft does not have to accelerate to the wind speed. It’s a free bee
Lol, if you don’t think a headwind increases lift, you probably shouldn’t be flying. That’s one of the biggest reasons why we takeoff and land into the wind
The original comment is correct.
There's a lot of other misunderstandings in this video as well.
I guess it is called freepilottraining, so the advice and explanation here are worth what you pay for them.
I won't be pointing my students in this direction. Sorry.
@@martinwatson5438 doubt you are a CFI anyways. If you disagree. Just because something is free doesn’t mean it isn’t quality. And just because we aren’t paying directly doesn’t mean it isn’t being paid for. So bring your negativity somewhere else.
If a headwind doesn’t increase lift then how do kites fly?
@@FreePilotTrainingyou’re misunderstanding what headwind is. Effects on ground on a wing not already producing lift is different than aircraft already airborne. Think of the treadmill problem.
Stay humble.
Did really just regurgitate the equal transit time theory??
The air has no idea how it has to travel.
Lol, the truth is that no one actually knows what causes lift…not even NASA. These are just an oversimplification from the FAA for the written test. This is a pretty decent article on the subject: www.scientificamerican.com/article/no-one-can-explain-why-planes-stay-in-the-air/
@@FreePilotTraining There are better explanations. I have a degree in Physics and have researched it.
Viscosity and the coanda effect ensure the airflow follows the curvature of the wing. Curved motion is a result of acceleration and hence a force towards the centre of rotation. This is centripetal force. Balancing it is centrifugal force ( think of the tension in the string when you rotate a suspended stone over your head). If the string were elastic it would stretch. Since air is compressible, it’s also “stretchable”. The centrifugal force acting opposite to the centripetal force therefore “stretches” or expands the air flowing over the wing. This lowers its density, hence pressure. According to Bernoulli the air must then speed up, which is what is observed.
In summary low pressure speeds up the air, rather than increased speed causing low pressure.
@@MrAlwaysBlue….in subsonic aerodynamics the air is treated as incompressible below around Mach 0.3. Density changes do not explain lift. Also, liquids being virtually incompressible, any explanation of lift that requires density change to explain the pressure change would fail completely for hydrofoils.
@@XPLAlN Air is incompressible? Good luck with that assumption giving met lessons to your students.
@@MrAlwaysBlue …what you just did there is called being obtuse. Where did I say the assumption of constant density is used in meteorology? And yet this assumption of incompressibility is widespread in low speed aerodynamic theory. We are dealing with virtually adiabatic, virtually constant head problems here, so very different to meteorology. The pressure distribution around the wing does not require density changes to explain it. If that were the case you would need a totally different explanation of lift for hydrofoil vs airfoil. Strange that you claim a degree in physics and yet do not know this. Very strange.
There is much wrong with this video. This myth about the air passing over the top having to go faster to meet the air on the other side will not be found in any aerodynamic textbook because it has no basis in physics.
Unfortunately, if you’re studying for your PPL, this is the way you need to learn it, even though it may be wrong
@@FreePilotTraining No it isn’t. Show me the textbook recommended by the FAA which uses this ‘equal transit time theory’. It is not in Aerodynamics for Naval Aviators, it is not in the PHAK. So upon which reference are you basing this idea that the FAA require you to teach this nonsense?
@@XPLAlNequal transit theory is wrong
It's literally in all of em, tf you're talking about? 😂🤣
@@redravenradios5036 …go ahead and name one. And make it one from the reference list found on the FAA website for the written test seeing as that is the claim here…..
Oh boy. Almost completely wrong.
Almost?
Great lesson🤓🤓🤓🤓🤓🤓🤓🤓🇯🇲
Great lesson🤓🤓🤓🤓🤓🤓🤓🤓🇯🇲
Thanks!