What Causes an Airplane to STALL? | Complete PPL Ground Course (Lesson 3)

This video is lesson 3 in our Private Pilot Ground Course, which will prepare you for your FAA written exam. This is a very easy to follow lesson about Stalls and what causes an airplane to stall. This video is easy to follow with very simple explanations of the basic aviation principles pertaining to stalls. We discuss How relative wind and the chord line of an aircraft create the angle of attack and how this angle of attack increases lift, but can also lead to a stall. This training is intended to follow the aeronautical knowledge areas in Part 61.105 section b for single engine aircraft.

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[Malik.R]

0:54 stall:rapid loss of lift

1:08 airfoil leading edge and trailing edge

1:22 chord line

1:37 prop wash, wind from the propeller going over the plane and wings

1:58 angle of attack: the angle between the relative wind and the wings chord line. It changes with direction of the plan

2:21 when we increase angle of attack or relative wind, we increase the lift as long as its smooth air flow

2:37 laminar flow, wind flows over and under the wing in smooth thin layers

2:40 low angles of attack the wind flows smoothly and the layers stay separated

2:57 high angles of attack increase the lift because the air has more distance to travel but it wants to flow straight back it would become separated from the top flow causing a disruption in the other flows. Boundary layer separation 3:22

4:11 stall when lift is less than weigh

4:25 altitude and weight affect stall speed but angle of attack is always the same

4:31 right before airplane stalls, it reaches the highest point of angle of attack and if it increase any more it will stall. This is called the critical angle of attack 4:43

5:18 wings are still producing some lift during a stall. To break a stall, reduce AoA and reduce back pressure on yolk

[johnopalko]

"This is the stick. To go up, pull back. To go down, pull back harder."

I forget where I read that but I've always liked it.

[victorcovarrubias]

Im a Ppl student. Your videos have thought me a lot. I want to say thank you dude.

[dalzmar]

Josh, I've watched your channel for awhile now and always seem to either learn something I didn't know already or often get a different perspective on the subject than I had before watching. Love the fact that your willing to put your time and energy to make these educational videos, to help student pilots and aviation enthusiasts that may be interested in pursuing flying in the future. May your hard work bless you and your family, and maybe one day we can share a cock pit and some air time together. Appreciate your influence as an Aviation Youtuber Thanks a lot!

[CJ-jwxv]

cannot thank you enough for explaining everything the way you do. I am a visual learner, and your channel has been a GOD SEND

[mishael]

Hi josh im only 11 and my uncle is in training to become a pilot and i want to become like him so he shows me your chanel and i understand soo much thank you for making such good vids im so interested to learn more and become a pilot someday just like my uncle thanks keep up the good work ❤

[Kaung]

These videos are incredible, I'm currently 16 and still in high school but I desperately wanna become a pilot as soon as I could and these amazing videos are easy to understand, helping me a Lot to learn the basics.Thanks for uploading and making a whole playlist.I hope you guys are doing well.❤❤❤

[JamesNgao-pkch]

Very interesting! Im a Kenyan and I must admit its generous of you to offer all these curious tutorials... I damn wanted to get to aviation class but couldn't due to normal constraints but u here to resurrect my hopes😊

[keyroseair]

Just ran into your channel and must say, Great Work! Your method of simple, easy to understand and in small digestible increments (episodes) is genius. As a new flight GA enthusiast, I wanted to thank you for taking the time and effort for putting these videos together.

[brettisjew]

Thanks so much Josh! I have been using the Sporty’s online ground school and owe it to your videos the much needed clarification. These are much more informative and have really helped me to understand. I appreciate it very much.

[pratyushambani]

i am studying for easa 66 modules and this is literally 1 whole chapter of my portion tnx a lot

[nicksantos]

you're the best! love how you're re-making this series!!

[Tiipori]

i can`t believe how well this series timed with my interest with aviation. I can`t begin training in flight school since i`m from Ukraine and our skies are closed, so i will learn the theory online for now, thank you so much for this!

[keeziajensen]

Thank you again for the real life visual example. Super helpful.

[jacmwo]

Great ground course for ppl training. Am learning something.josh classes are easy to understand. Great work josh.

[bernerdani]

Wow Very nice! Thank you so much! It's very useful for someone ho wants to become a Pilot.

[sean]

Why are you reposting your videos? also they really helped me on my written. Took it last week got a 93%

[wheninrome]

thanks so much Josh, just starting out with studying for my PPL and your stuff is the best on the internet! Do you have any plans to write up some pop quizes or tests that we can study after x amount of lessons? that would help me!

[mishael]

i will go on a flight when im 12 with my uncle
thanks so much hes so proud of me beacause of your videos im so good at all this thank you soo much 👍

[phillp]

do u only fly Cessna? piper or low wing ever?
you should need do sep vid on yur bio etc backgrd location etc.
is this yur plane or rental fbo ?
How u got started, goals etc..hope so