Private Pilot Ground School
Private Pilot Ground School
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Viewer Question - Oxygen and Pressurization | PPGS
Thank you for asking questions. Hope this helps some of you in case you were curious.
มุมมอง: 356

วีดีโอ

Should I Get A Degree | PPGS
มุมมอง 196ปีที่แล้ว
Do you need a degree to fly big shiny jets? As a reminder, Private Pilot Written Test questions available here: sites.google.com/view/privatepilotgroundschool/home Hiccup Waltz Music from Uppbeat (free for Creators!): uppbeat.io/t/giulio-fazio/hiccup-waltz License code: JJZIOQT0S0KURYYR
Mock Oral and Written Test Prep | PPGS
มุมมอง 484ปีที่แล้ว
If you can answer all these without having to look too many things up, I think you're ready for either a written test or an oral. Link to Practice Written Tests: sites.google.com/view/privatepilotgroundschool/home
Electronic Flight Displays | PPGS
มุมมอง 5742 ปีที่แล้ว
If you haven't flown with a glass cockpit, this might be a good overview for you. Practice Written Tests: sites.google.com/view/privatepilotgroundschool/home
XC Written Problems | PPGS
มุมมอง 6042 ปีที่แล้ว
Written Test Quizzes: sites.google.com/view/privatepilotgroundschool/home Link to problems and figures shown in this video: drive.google.com/file/d/1NQZRNPtk5PZW1cp7rHUoVZHMUp1Wg_oB/view?usp=sharing If you're interested in using an electronic E6B, here is how those work: th-cam.com/video/Kg-GQw7eoqQ/w-d-xo.html Music used: Manouche in Belleville uppbeat.io/t/giulio-fazio/manouche-in-belleville ...
Updates | PPGS
มุมมอง 462 ปีที่แล้ว
Practice Written Tests: sites.google.com/view/privatepilotgroundschool/home Subscribe:
Weight and Balance - Viewer Qs | PPGS
มุมมอง 9612 ปีที่แล้ว
Someone wanted to know more about weight and balance - here you go. Thanks for the question. Practice Written Test Questions: sites.google.com/view/privatepilotgroundschool/home
I Need Your Questions | PPGS
มุมมอง 292 ปีที่แล้ว
Got any burning questions that need answering?
How Do I Talk on the Radio? | PPGS
มุมมอง 1.5K2 ปีที่แล้ว
Tips and tricks on radio communications. Also a cross-country example (with real ATC). Practice Written Test Questions: sites.google.com/view/privatepilotgroundschool/home Any video topics you'd like to see me cover? Please leave a comment. I'm desperate for new ideas. Thanks
Constant Speed Propellers | PPGS
มุมมอง 18K2 ปีที่แล้ว
As requested by one of you, here's a video on constant speed props. Practice Written Test Questions: sites.google.com/view/privatepilotgroundschool/home Any video topics you'd like to see me cover? Please leave a comment. I'm desperate for new ideas. Thanks
Short Soft Takeoffs and Landings | PPGS
มุมมอง 3702 ปีที่แล้ว
As requested by one of you, here's a video on Short and Soft Field Takeoffs and Landings. Practice Written Test Questions: sites.google.com/view/privatepilotgroundschool/home Any video topics you'd like to see me cover? Please leave a comment. I'm desperate for new ideas. Thanks
Becoming a Pilot FAQs | PPGS
มุมมอง 5153 ปีที่แล้ว
What else would you like to know? Practice Written Test Questions: sites.google.com/view/privatepilotgroundschool/home 00:00 Intro 00:06 How Do I Become A Pilot? 00:38 Do I Need To Go To A Flight School? 01:29 How To Find A Local Airport 01:54 How Much Does It Cost? 03:54 How Do I Pay For It? 04:31 Do I Need A Degree? 04:51 Will I Pass My Medical? 05:22 Will Flight Simulator Make Me A Better Pi...
How Do I Keep It Cheap | PPGS
มุมมอง 2433 ปีที่แล้ว
Flight training is expensive, and it's a good idea to know just how expensive so you can be prepared ahead of time. How do you keep it on the cheap while getting a good education? Online aviation charts: skyvector.com/ Aviation Loans: www.pilotfinance.com/ Google around! There's a lot more out there More tips on saving money during training: bit.ly/3i7jaUc Any video topics you'd like to see me ...
Opportunities In Aviation | PPGS
มุมมอง 1583 ปีที่แล้ว
There are so many things to do in aviation. Some of them are discussed in this video. FAA Inspectors/Investigators: t.ly/XdTa Airplane Mechanics: t.ly/Ov04 Flight Attendants: bit.ly/3fzf45Q ATC: bit.ly/3vHRYj8 Pilots: www.faa.gov/pilots/become/ Ground support staff (gate agents, bag handlers, etc) jobs are usually found on the airline specific websites or on Indeed/Monster, etc. 00:00 Intro 00:...
QuickClips - Aerodynamics
มุมมอง 2403 ปีที่แล้ว
Practice Written Test Questions: sites.google.com/view/privatepilotgroundschool/home More info: th-cam.com/video/rGIua2fZzSw/w-d-xo.html th-cam.com/video/m6d31yMH6_w/w-d-xo.html
QuickClips - Flight Instruments
มุมมอง 2243 ปีที่แล้ว
QuickClips - Flight Instruments
QuickClips - Forces In Flight
มุมมอง 2153 ปีที่แล้ว
QuickClips - Forces In Flight
QuickClips - Airplane Stability
มุมมอง 2343 ปีที่แล้ว
QuickClips - Airplane Stability
QuickClips - More Aerodynamics
มุมมอง 1773 ปีที่แล้ว
QuickClips - More Aerodynamics
QuickClips - Aviation Weather Reports
มุมมอง 2423 ปีที่แล้ว
QuickClips - Aviation Weather Reports
QuickClips - Airplane Parts
มุมมอง 2783 ปีที่แล้ว
QuickClips - Airplane Parts
QuickClips - How Much Does It Cost
มุมมอง 2343 ปีที่แล้ว
QuickClips - How Much Does It Cost
QuickClips - How To Become A Pilot
มุมมอง 5123 ปีที่แล้ว
QuickClips - How To Become A Pilot
Planning A XC | PPGS
มุมมอง 9163 ปีที่แล้ว
Planning A XC | PPGS
Using a VOR | PPGS
มุมมอง 3673 ปีที่แล้ว
Using a VOR | PPGS
Charts and Publications | PPGS
มุมมอง 5193 ปีที่แล้ว
Charts and Publications | PPGS
Aviation Wx Services 2 | PPGS
มุมมอง 1.3K3 ปีที่แล้ว
Aviation Wx Services 2 | PPGS
Wx Services | PPGS
มุมมอง 2.3K3 ปีที่แล้ว
Wx Services | PPGS
Basic Weather Theory pt.2 | PPGS
มุมมอง 9K4 ปีที่แล้ว
Basic Weather Theory pt.2 | PPGS
Basic Weather Theory | PPGS
มุมมอง 28K4 ปีที่แล้ว
Basic Weather Theory | PPGS

ความคิดเห็น

  • @jspardine
    @jspardine 4 วันที่ผ่านมา

    Both the animations and the explanations were very well done. This filled in a few gaps for me going into the multi add on.

  • @RossLeavitt
    @RossLeavitt 8 วันที่ผ่านมา

    The music makes it unwatchable.

  • @user-jh5fm7ci6o
    @user-jh5fm7ci6o 9 วันที่ผ่านมา

    Weather is the hardest thing in learning to fly. I can put the plane right on the number and center line in a soft manner yet, understanding all this weather and knowing every weather symbol in AWS is not easy.

    • @PrivatePilotGroundSchool
      @PrivatePilotGroundSchool 9 วันที่ผ่านมา

      I hear you. There's still times I have to pull out the decoding guide myself. Maybe have a screenshot handy? The more you see it, the more it'll make sense. Thanks for the comment.

    • @user-jh5fm7ci6o
      @user-jh5fm7ci6o 8 วันที่ผ่านมา

      @@PrivatePilotGroundSchool I just failed my checkride because I was not allowed the decoding guide and missed a weather question. This DPE fails students if they miss even one weather question. While the FAA states that the oral is an open book exam, this DPE would not allow me to use my FAR-AIM or ACS for any questions. I answered all my other questions with out having to reference the FAR-AIM but when he got to the weather section. It became very difficult. I read the Metar and TAF's correctly, fronts, basic weather stuff. Than he went to the observation page on the AWS and wanted me to know most of all the symbols. He would not let me use the legend. Well I did not do well on that. I am toast and struggled. Then he goes on to Thunderstorms. After asking me the questions about how a thunderstorm develops and what the three stages are, He asked me what causes lightening in the mature stage. I stated clouds hitting each with the drafts up and down and turbulence. He took that "no" for an answer, I then stated electricity and was grasping for straws. The DPE wanted me to state "Severe up and down drafts is charging the particles along with some other verbiage that I do not understand. Then he asked about the different types of Airmets. I was answering what Airmet Sierra was, I stated - Mountain obscuration - clouds covering and over a mountain. The DPE did not accept that answer and gave me a disapproval. Weather is just so hard. The weather theory in this video is not detailed enough to pass a check-ride. There is more deep down theory you must know in order to pass a Private Pilot check-ride according to my terrible check-ride experience.

  • @boardpalmtrees1946
    @boardpalmtrees1946 9 วันที่ผ่านมา

    Looks like a good video unfortunately I can not focus with music in the background, I tried

  • @razorgg
    @razorgg 11 วันที่ผ่านมา

    Wonderful, stellar, incredible , marvelous!

  • @shamelessp
    @shamelessp หลายเดือนก่อน

    Lovely! Best one out there for metars

  • @Skylion73
    @Skylion73 2 หลายเดือนก่อน

    These are by FAR the BEST airspace explanation/educational videos in the web. Outstanding job. Thank you!

    • @PrivatePilotGroundSchool
      @PrivatePilotGroundSchool 2 หลายเดือนก่อน

      Thanks! Glad you liked them. Hopefully they help you remember all the nuances.

  • @miepic3291
    @miepic3291 2 หลายเดือนก่อน

    Thanks a ton, great video, I liked the music :)

  • @sohaibchetioui6453
    @sohaibchetioui6453 2 หลายเดือนก่อน

    Amazing video ! Thanks you

  • @caribbaviator7058
    @caribbaviator7058 2 หลายเดือนก่อน

    Definitely looking this over before the checkride!

  • @moisesgonzalez421
    @moisesgonzalez421 2 หลายเดือนก่อน

    On minute 8:26 I believe the CTAF frequency for San Jose is not 122.95 it is actually 124.0 as stated by the C next to the star. The frequency 122.95 is actually the Unicom Frequency for SJC.

    • @sergeyus2006
      @sergeyus2006 2 หลายเดือนก่อน

      Thanks for pointing that out! You'd be surprised how easy it is to mis-speak something when there's a lot of info in a few sentences. Good catch.

    • @PrivatePilotGroundSchool
      @PrivatePilotGroundSchool 2 หลายเดือนก่อน

      Good catch. Thanks

  • @natalivieira7748
    @natalivieira7748 3 หลายเดือนก่อน

    Upload a version without this song in the background. As autistic, I can't keep watching this one, because it is too disturbing. But I love your content.

    • @PrivatePilotGroundSchool
      @PrivatePilotGroundSchool 3 หลายเดือนก่อน

      I certainly will. It might take me a while, but I appreciate the feedback. Thank you.

  • @kingston5469
    @kingston5469 3 หลายเดือนก่อน

    I'm using your video for my CFI lesson plans, I hope you don't mind. The visuals are just too good

    • @PrivatePilotGroundSchool
      @PrivatePilotGroundSchool 3 หลายเดือนก่อน

      Hey, if it helps somebody, that's a win in my book. Glad to see it's useful. Thanks for the kind words.

  • @ujinxedit
    @ujinxedit 3 หลายเดือนก่อน

    About to do the training for the CSU and RG design features in a 172RG. This was incredibly helpful. Do you have any ground school for the RG component? Couldn't find any in your videos.

    • @PrivatePilotGroundSchool
      @PrivatePilotGroundSchool 3 หลายเดือนก่อน

      Congrats! Hope it works well for you. If you're doing a flight school program or even a complex endorsement, the gear and prop are required to be taught. I'm fairly certain you'll look like a genius knowing what you know about the prop and can also learn about the gear in the process. I don't have any videos on the hydraulics of the gear, because you usually don't see that until your commercial flight training (fixed gear planes are cheaper)... Sorry

  • @danieljones2016
    @danieljones2016 4 หลายเดือนก่อน

    thanks this is awsome

  • @lindsaywootten9127
    @lindsaywootten9127 4 หลายเดือนก่อน

    You should make differences between Southern and Northern Hemispheres clear…

  • @kelvinhechangze3016
    @kelvinhechangze3016 4 หลายเดือนก่อน

    Exactly what FAA PHAK Ch12 tells us🎉Nice video!

  • @gee-force
    @gee-force 4 หลายเดือนก่อน

    Video could have been good but for the annoying unnecessary distracting music in the background. Couldn't watch beyond 15 seconds!

    • @PrivatePilotGroundSchool
      @PrivatePilotGroundSchool 4 หลายเดือนก่อน

      Sorry to hear that.

    • @gee-force
      @gee-force 4 หลายเดือนก่อน

      @PrivatePilotGroundSchool You have several viewers make the same comment. There's no need for the library stock music loop in the background that actually overpowers the commentary, is distracted, and is not needed. It's not adding any value. Can you remove the music. It's easy!

    • @PrivatePilotGroundSchool
      @PrivatePilotGroundSchool 4 หลายเดือนก่อน

      That's the plan at some point. Thanks for the comment

  • @kingston5469
    @kingston5469 4 หลายเดือนก่อน

    Whatchu mean "bad animation?" That was incredible!!!

    • @PrivatePilotGroundSchool
      @PrivatePilotGroundSchool 4 หลายเดือนก่อน

      Thanks for the vote of confidence! As long as it explained what it was trying to, that's a winner in my book. Glad you liked it.

  • @josephcline370
    @josephcline370 4 หลายเดือนก่อน

    This would be reall good info if it weren't for the distracting monototous added noise!! just saying...

    • @PrivatePilotGroundSchool
      @PrivatePilotGroundSchool 4 หลายเดือนก่อน

      Sorry! I should really tell the elves next door to quit playing their jigs when I'm recording. 😒

  • @straump
    @straump 5 หลายเดือนก่อน

    Hi, I am impressed with your explanations and videos. Is there a suggested sequence in viewing these? I find myself overwhelmed with the amount information and would like to focus on that information that will help me successfully complete my ground school training.

    • @PrivatePilotGroundSchool
      @PrivatePilotGroundSchool 5 หลายเดือนก่อน

      Thanks for the kind words. You can use this playlist th-cam.com/play/PLcJ53UyRbk17W5BUrnjCsoxibkJXXc727.html&si=6NyDoE6x0IdjbtPB. It should lay down some building blocks to get going. Unfortunately, a lot of the things interconnect and it's hard to separate them into individual subjects. I would recommend watching the video, then doing the practice test associated with it (link in description), and seeing how well you understand the material. As good as the videos may seem they're not all-encompassing or they would be hours long. You should read the Airplane Flying Handbook and Pilot Handbook of Aeronautical Knowledge as well. Hope that helps.

  • @juanbetancur1046
    @juanbetancur1046 5 หลายเดือนก่อน

    Thanks for the video very informative

  • @julianhahn01
    @julianhahn01 5 หลายเดือนก่อน

    that video was packed with information! I had to take a lot of notes to feel like I would get anything out of it, so I guess your 14min video took me roughly 40min. to get through, but I feel much smarter! Have nothing to do with flying planes, just want to understand a weather report better, when I go hiking next time. Thank you!

  • @generaldvw
    @generaldvw 5 หลายเดือนก่อน

    Very good job!

  • @EmelyMarquez-wm6sx
    @EmelyMarquez-wm6sx 5 หลายเดือนก่อน

    Love the video its helpful and everything but the background music is a bit distracting.

    • @PrivatePilotGroundSchool
      @PrivatePilotGroundSchool 5 หลายเดือนก่อน

      Thanks for the compliment. I wish I could change it, but it's kinda set in stone....

  • @EmelyMarquez-wm6sx
    @EmelyMarquez-wm6sx 6 หลายเดือนก่อน

    Im a 8th grade teacher snd this video is perfect for my 8th graders they will love this video and the best part is that it's inappropriate and good for them because when they see something innappropriate they start laughing and I have to send them out of my classroom and if they watch a video without laughing I bring donuts the next day for thanking them for not laughing and for my beuty queens I get makeup from Ulta or Sephora and I am happy that's my way of thanking them. THANK YOU!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

  • @GaryWardatCoastalBliss
    @GaryWardatCoastalBliss 6 หลายเดือนก่อน

    Explanation of the Coriolis Effect is not quite right. The physics is not really correct here, although there seems to be a bit if an attempt to try to explain the real physics behind it, but stops short. It is not about the different relative speeds at different latitudes, but the fact that the reference frame is moving. National Geographic gives a much better explanation of the Coriolis Effect. th-cam.com/video/mPsLanVS1Q8/w-d-xo.html

  • @The_Content_Pirate
    @The_Content_Pirate 6 หลายเดือนก่อน

    Very good video! Helps me studying a lot! For anyone wondering if the information is accurate, I checked it against the Gleim private pilot test prep and it’s good!

    • @PrivatePilotGroundSchool
      @PrivatePilotGroundSchool 6 หลายเดือนก่อน

      Thanks for the kind words! Glad to hear it's helping you learn.

  • @Nickmh07
    @Nickmh07 7 หลายเดือนก่อน

    Good video

  • @imachavel
    @imachavel 7 หลายเดือนก่อน

    I don't care who you are. You could spend the rest of your life looking up different weather fronts and altitudes, understanding temperature and dew point spread, air pressure vs air density (which are not the same even if seemingly so), things like temperature inversions, how uneven heating of the earth basically causes and creates all weather changes for all practical purposes, and just be scratching the surface as far as understanding how complex the worlds weather operates. The weather is so subtle and yet so powerful and changes so quickly and on no two days is it ever predictable enough to ever say the weather is exactly the same any two times ever unless your perception of it is simply sunny vs cloudy vs stormy. To really pay attention to the weather is to notice subtleties in the air that change the difference between a calm breeze which won't even move the hair on your arms to a wall of wind that could practically knock down a mountain and will literally smooth out jagged rocks over thousands of years to being saturated with water until it pours down to being able to relatively suspend water at a temperature even enough to reduce almost all visibility to zero. Its a neverending orchestra of observations as far as I am concerned.

    • @PrivatePilotGroundSchool
      @PrivatePilotGroundSchool 7 หลายเดือนก่อน

      It sounds like you would enjoy The Secret World of Weather by Tristan Gooley. Thanks for so eloquently describing this massive swirl of air and water we call weather.

  • @chuckmartin5773
    @chuckmartin5773 8 หลายเดือนก่อน

    Great video!!! Thank you

  • @zz3709
    @zz3709 8 หลายเดือนก่อน

    Great content & good pace, but would really prefer if you nixed the background music.

  • @kentuvman
    @kentuvman 8 หลายเดือนก่อน

    Thank You Learned something!

  • @Pdev0110
    @Pdev0110 8 หลายเดือนก่อน

    Helpful but the music in the background was too distracting to finish. 😢

    • @PrivatePilotGroundSchool
      @PrivatePilotGroundSchool 8 หลายเดือนก่อน

      Thanks for the comment. Wish I knew at the time that was the case. Too late to turn the volume down now....

  • @dannialkhakdoust4518
    @dannialkhakdoust4518 9 หลายเดือนก่อน

    Dude thank you. Quick engaging and understandable. So many videos are slow and hard to focus on.

    • @PrivatePilotGroundSchool
      @PrivatePilotGroundSchool 9 หลายเดือนก่อน

      I wish you gave me that advice back when I started 🤣. Thanks for the kind words. Glad you enjoyed it.

  • @babiella
    @babiella 9 หลายเดือนก่อน

    thank you

  • @gregsmagic
    @gregsmagic 10 หลายเดือนก่อน

    Great refresher

  • @dlatricej7
    @dlatricej7 10 หลายเดือนก่อน

    Hi, thank you for this video. Could you explain how you got the 13%? I'm confused 😢... trying to understand the part about the above standard part. Pleeeease 🙏🏾 thank you!

    • @PrivatePilotGroundSchool
      @PrivatePilotGroundSchool 10 หลายเดือนก่อน

      That took a while to find...a timestamp would be appreciated next time 😉. You're cruising at 5,500ft in the example. Based on a standard temperature lapse rate (2°C per 1,000ft), the temp is supposed to be +4°C [sea level at 15°]. The winds aloft show +17°C. It is 13°C warmer than standard at our altitude. The performance note (#3) says to "Increase time, fuel and distance by 10% for each 10°C above standard temperature". Our 13°C is 10% + 3%, or 13% above standard. Hope that helped.

    • @dlatricej7
      @dlatricej7 10 หลายเดือนก่อน

      Thank you much and yeah, I should've given you a timestamp 😅. Sorry about that, but yes, it did help, a lot! Really appreciate this video.

  • @peterrabbit2719
    @peterrabbit2719 10 หลายเดือนก่อน

    You’re giving information that could save someone’s life. Get rid of the repetitive background music.

    • @PrivatePilotGroundSchool
      @PrivatePilotGroundSchool 10 หลายเดือนก่อน

      I wish it was that easy. I'd have to re-upload the whole video. Glad you enjoyed the content

  • @mleobviously
    @mleobviously 10 หลายเดือนก่อน

    could've walked there in the time it would take me to figure out this navlog 🙃 Thanks for the video, very helpful!

  • @cjsi2448
    @cjsi2448 10 หลายเดือนก่อน

    Bro these videos are excellent. You’re quick and straight to the point. Much appreciated, can’t believe you aren’t a 100k+ subs account

  • @twobrokepilots
    @twobrokepilots 10 หลายเดือนก่อน

    Is it possible to get this presentation on PowerPoint format ?

    • @PrivatePilotGroundSchool
      @PrivatePilotGroundSchool 10 หลายเดือนก่อน

      I mean, theoretically yes. I'd have to go in and type up everything in PowerPoint from the video. If you're trying to become a CFI (or just learn the material) , this is something you should do yourself. Trust me, you'll remember more and actually have neural connections that last decades rather than clicking through someone else's presentation. Not saying I can't do it, but the process is the same for me as for you. If you'd like to learn this, do it yourself. Otherwise, give me a reason to put in hours of free time into making a PowerPoint. Not trying to be mean, just realistic. Hope that answers the question?

    • @twobrokepilots
      @twobrokepilots 10 หลายเดือนก่อน

      I was just wondering if you already have it as a PowerPoint. I wanted to pass it around my training center and for students to be able to make notes on each slide as they follow your video

    • @PrivatePilotGroundSchool
      @PrivatePilotGroundSchool 10 หลายเดือนก่อน

      Gotcha. If I type one up, I'll send you a link

  • @justinmay5009
    @justinmay5009 11 หลายเดือนก่อน

    Best explained XC planning ive watched so far!

  • @TherealAsanD
    @TherealAsanD ปีที่แล้ว

    Hey, thanks for this!

  • @staralliance185
    @staralliance185 ปีที่แล้ว

    Outstanding video, thanks

  • @AnkitPatel-di3md
    @AnkitPatel-di3md ปีที่แล้ว

    Thank you very much 🙏 ❤❤❤

  • @Westsideaviation23
    @Westsideaviation23 ปีที่แล้ว

    And I'm the 1st like

  • @Westsideaviation23
    @Westsideaviation23 ปีที่แล้ว

    The legend is back

  • @taproom113
    @taproom113 ปีที่แล้ว

    How does the oil get from a 'non-rotating' engine into a rotating prop hub? Through the back of the crankshaft?

    • @PrivatePilotGroundSchool
      @PrivatePilotGroundSchool ปีที่แล้ว

      Constant-speed props work on engines with hollow crankshafts. That's how you get the oil in there. Really good question. Fun fact: if your engine has a solid crank, trying to switch from fixed-pitch to a constant-speed prop won't work.

    • @taproom113
      @taproom113 ปีที่แล้ว

      @@PrivatePilotGroundSchool Check! Thanx for the quick reply. Keep up the good work ... ^v^

  • @AnkitPatel-di3md
    @AnkitPatel-di3md ปีที่แล้ว

    I know your channel is about Private Pilot but can you please explain Oxygen and Pressurization systems. I am very confused on them.

    • @PrivatePilotGroundSchool
      @PrivatePilotGroundSchool ปีที่แล้ว

      I can sure give it a shot. Thank you for the request. A short explanation is like a balloon with a hole in it. You pump more air in but control how much leaks out through the hole. That's how you maintain a certain pressure. But I will make a video on this in the future. Thank you.

    • @PrivatePilotGroundSchool
      @PrivatePilotGroundSchool ปีที่แล้ว

      th-cam.com/video/nlB7637JlpQ/w-d-xo.html