How an Airplane Creates Lift | Complete PPL Ground Course (Lesson 2)

[@ahmedgouda1094]

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

[@FreePilotTraining]

You’re welcome! That’s awesome! He’ll be stoked

[@carmeSUS]

Thank you so much for the free lessons! Gonna be a huge help going into zero to hero training in about a month. Cheers!

[@FreePilotTraining]

You’re welcome

[@JavierBonilla-xn3gl]

I really appreciate what your doing , im completely new to everything and its awesome that you take the time to do this

[@FreePilotTraining]

You’re welcome!

[@deanarndell4609]

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! 😎🤙🛩️🌅

[@FreePilotTraining]

Thanks! I’m stoked for you! You’re gonna love it!

[@gamerschuck4391]

I love this cz you are giving the practical knowledging in the end ,thanks

[@FreePilotTraining]

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

[@isaackirk2825]

Thank you so much for your content! I started my flight training again this week after a 10 year break from when I was 12. Looking forward to going through these more!!

[@FreePilotTraining]

You’re welcome!

[@chrisa.41]

Great job, if you had a PIP of the 6-pack zoomed in, perhaps witha dedicated camera, that would be the cherry on top.

[@FreePilotTraining]

Great feedback! Thanks! I’ll consider that for future videos

[@indiasmith7373]

This is awesome, I want to become a pilot but it's expensive. I was trying to figure out how to cut cost. I can study these videos along with the ACS PPL book and hopefully be ready to test!

[@FreePilotTraining]

That will work!

[@tsikinite]

This series is going to be very helpful for me!

[@FreePilotTraining]

Awesome!

[@jacmwo9865]

Great lessons josh, keep going you're great instructor.i love it .lesson 2 through.

[@FreePilotTraining]

Thanks!

[@oleksp7095]

Super helpful video, I appreciate you, definitely touched on the most important info in straight forward manner, Thank you!

[@FreePilotTraining]

You’re welcome! Thanks for watching!

[@camilacalanza4435]

Thank you so much for your content sir! It's really helpful. Keep posting po. God bless you.

[@FreePilotTraining]

You’re welcome!

[@LtKrunchy]

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…

[@FreePilotTraining]

Mostly new visuals, but I wanted to include some information that actually ties this information in with flying

[@FreePilotTraining]

Awesome! Love seeing my shirts around! Thank you so much!

[@LtKrunchy]

I do like how you added actual flight to the videos…

[@canobird4875]

Bro, i just want to study before flight school. 😭

[@hunterfulton9866]

Same here!

[@mikecoffee100]

Uplifting video

[@FreePilotTraining]

😂

[@sethm7761]

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 !

[@FreePilotTraining]

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

[@rotor-head]

Are taking about, L=V^2 da/2 S Cl ?

[@adroitcozy]

How does a plane with symmetrical wings generate lift, it is all to do with AOA.

[@10_pointer322]

My training place doesnt have ground schol so this will be very helpful.

[@FreePilotTraining]

Awesome!

[@FrankSlater]

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: kzbin.info/www/bejne/ppmUeaSontR_htU

[@FreePilotTraining]

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

[@FrankSlater]

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.

[@KevinSmithAviation]

As always, Josh, another great quality video. Keep up the excellent work. Safe skies my friend 🇺🇸🛩️

[@FreePilotTraining]

Thanks Kevin!

[@nghiepthanhnguyen1038]

Super great and helpful videos bro! Appreciate! Anyway, is it late to begin this journey for becoming an airline pilot at age of 34?

[@FreePilotTraining]

You’re welcome! No way! It’s definitely not too late

[@corythomas3925]

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

[@FreePilotTraining]

Thanks! Yes, induced drag decreases with airspeed, but you can also increase induced drag by increasing lift

[@christophergagliano2051]

@@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.

[@FreePilotTraining]

@@christophergagliano2051there are many reasons to care about it. Here’s one: kzbin.info/www/bejne/b4PTiop3lLeqgqcsi=lU5IEBhMTJCDDxwa

[@Light_Of_Elohim]

​​@@christophergagliano2051These are important concepts we need to understand to control a plane.

[@christophergagliano2051]

@@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?

[@bf-696]

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.

[@FreePilotTraining]

The wind on top must travel a farther distance than the wind on the bottom. This makes it move faster.

[@ttfyppgaming7160]

@@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?

[@Haniel93]

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.

[@MrAlwaysBlue]

​@@Haniel93This video needs to be removed.

[@christophergagliano2051]

​@@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

[@andrewchorley4002]

This channel goes ham.

[@FreePilotTraining]

I had to look it up to see what that meant 😂

[@vestitivolati]

Love everyone of your videos Josh ❤

[@FreePilotTraining]

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 🤞

[@vestitivolati]

@@FreePilotTrainingcan’t wait to watch it!

[@coderexe30]

Holy crap dude, you took an already good video and made it great! This is amazing. Well done sir, and thank you.

[@FreePilotTraining]

Thank you so much!

[@stephanemetellus4261]

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

[@ColinMakesAllTheThings]

I love this series and the lessons. Do you have quiz questions somewhere for each of these episodes?

[@FreePilotTraining]

I don’t. I hope to build an app at some point

[@kaikitree]

that would be rad

[@vrj8446]

Really great videos. Thank you so much for such great effort! Can you write here how you are increasing the angle of attack. I understand how you increased thrust and how flaps directed downwards to create lift. But what did you do to change the nose angle ? Did you change angle of elevator for that?

[@FreePilotTraining]

Changing the angle of attack is TYPICALLY done by using the elevators to pitch up or down, but other things can affect it as well. Increasing airspeed can also push your nose up as well and any wind can change this angle too.

[@vrj8446]

​@@FreePilotTraining Understood. Thank you!

[@motomarmot6544]

I cant thank you enough. 🤝

[@FreePilotTraining]

You’re welcome!

[@AnnaRashid-e5e]

hi Sir. this is very helpful for me. I appreciate it. but I was thinking that can you please make a quiz for us that will be very helpful. please and thank you.

[@AnnaRashid-e5e]

what we have went through we want a quiz . Sir i am looking forward for your reply.

[@FreePilotTraining]

I’m currently working on a way to give quizzes. I’ll announce through a video when that’s done

[@hawkofthecovenant]

Great lesson🤓🤓🤓🤓🤓🤓🤓🤓🇯🇲

[@gringoquenocomecuy]

Thanks!

[@FreePilotTraining]

No problem

[@Ludwing730]

The GOAT! JoSH

[@FreePilotTraining]

😆

[@harryjoe860]

I just applied for my student license. I want to get the written exam out of the way before I go to fly

[@FreePilotTraining]

Awesome

[@ЕгорГрисюк-ч1ф]

I can’t understand how does everyone explain the lift creation only this way, and forget about Coanda effect

[@FreePilotTraining]

It’s because this is the way you’re tested on the FAAs exam. When they change it, I will change my video

[@ЕгорГрисюк-ч1ф]

I've got it, thanks

[@ЕгорГрисюк-ч1ф]

@@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

[@XPLAlN]

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).

[@gregai8456]

@@FreePilotTrainingyou should also just state that this explanation is wrong, but the FAA wants you to know the sky is brown.

[@alexwarren355]

I have a huge question so I have been looking around at online ground courses and I know you have to get an endorsement to take your written exam but I don’t know which online course is the best and will actually give me that endorsement?

[@FreePilotTraining]

Honestly, most any of them will give you an endorsement. I’m working to build a course to go along with this material that will give an endorsement after completion. It’s going to be a few months before I can finish it up

[@alexwarren355]

@@FreePilotTraining can’t wait till you finish it up, may I ask did you use an online course? Or were you in a pilots school? I have another question so I’ve been looking around for one but how do I find a AME or a aviation medical examiner because either know you need a FAA medical examination to get you ppl

[@alexwarren355]

@@FreePilotTraining sorry that’s a lot of questions

[@JSmith777]

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?

[@FreePilotTraining]

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

[@JSmith777]

@@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?

[@dannythevito3205]

Wish I had this in my private training 😂this will be big I can tell

[@FreePilotTraining]

Thanks! I hope so!

[@kevw172]

same!

[@bobo-l5v]

AF447 1st officer was sleep for this lesson!

[@FreePilotTraining]

Lol

[@michaelpersico1740]

Wow, nothing about the center of gravity being ahead of the center of lift. Requiring the stabilizer to hold the aft end down.

[@FreePilotTraining]

That explanation will be in the weight and balance video.

[@robertd57i989]

Not sure if anyone caught this but the outro music in the background is the same as NEEBS Gaming for their Among Us videos

[@FreePilotTraining]

Lol. It’s just the free KZbin music

[@KevinS819]

technically doesn't the elevators create lift too, just downward?

[@FreePilotTraining]

Yes it does. The weight and balance video explains that more

[@christophergagliano2051]

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

[@FreePilotTraining]

The video doesn’t say that, it’s says, “just like in a venutri” the upper surface of the wing speeds up the air…

[@christophergagliano2051]

@@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?

[@FreePilotTraining]

@@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.

[@christophergagliano2051]

@@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.

[@M0ToR]

​@@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

[@GS-wn2dw]

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?

[@FreePilotTraining]

Initially yes, the aircraft will balloon. Technically the CG doesn’t move, it’s the center of pressure. You might like this video kzbin.info/www/bejne/qnyxnXmAbZ6qrKMsi=DaiklA4HyfL624ug

[@tomcruzeee]

Hello! I've always thought that the air going over the top of the wing goes faster and creates a partial vacuum, and it is this suction that creates lift! Is this still true, or is lift generated solely because of the higher pressure on the bottom of the wing?

[@FreePilotTraining]

There are different theories out there. Yours is one school of thought

[@johnsteichen5239]

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

[@FreePilotTraining]

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

[@martinwatson5438]

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.

[@StaticJA]

⁠@@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.

[@nathanbourquin6554]

If a headwind doesn’t increase lift then how do kites fly?

[@gregai8456]

@@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.

[@Amos-fn7ie]

actually we could refer to the ground course made by MIT and the links are kzbin.info/www/bejne/m5Wvn42de56gi8k

[@FreePilotTraining]

Someone else just showed me that too. Good to know. Who’s better?

[@Amos-fn7ie]

@@FreePilotTraining I like both but I will use your course sir, after that switch to MIT's course. I prefer your inflight scene BTW

[@MrAlwaysBlue]

Did really just regurgitate the equal transit time theory?? The air has no idea how it has to travel.

[@FreePilotTraining]

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/

[@MrAlwaysBlue]

@@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.

[@XPLAlN]

@@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.

[@MrAlwaysBlue]

@@XPLAlN Air is incompressible? Good luck with that assumption giving met lessons to your students.

[@XPLAlN]

@@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.

[@XPLAlN]

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.

[@FreePilotTraining]

Unfortunately, if you’re studying for your PPL, this is the way you need to learn it, even though it may be wrong

[@XPLAlN]

@@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?

[@bige6560]

​@@XPLAlNequal transit theory is wrong

[@redravenradios5036]

It's literally in all of em, tf you're talking about? 😂🤣

[@XPLAlN]

@@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…..

[@whoanelly737-8]

Oh boy. Almost completely wrong.

[@FreePilotTraining]

Almost?

[@hawkofthecovenant]

Great lesson🤓🤓🤓🤓🤓🤓🤓🤓🇯🇲

[@FreePilotTraining]

Thanks!

[@hawkofthecovenant]

Great lesson🤓🤓🤓🤓🤓🤓🤓🤓🇯🇲