WOW! Why would nobody else explaining this convergency topic almost so perfectly like you!? The only think missing is you did not explain when do we add and when do we subtract the result from the rhum line when calculating the initial and the final great circle. Thank you!
I just passed Gnav, Met, MB and PoF, And I seriously dont think i would have if it wasnt for these videos. Things that were complex and hard for anyone new to understand was made so simple, yet so well explained by @PilotEd. Thank you so much!
That’s a great explanatory video.. I had quite some difficulties understanding the concept until I watched your video! Thanks a lot and keep up your great work :)
Agree with Farhan...I finally understand this! My brain has reconstituted and turned from goo to grey matter again! So grateful for your explanation with diagrams though :)
Wow, I love the way it's explained! I'm starting my integrated ATPL in 2 weeks so I can see this being very handy! Any tips? I haven't studied in over 5 years and now have to study and sit exams on the 14 subjects in 6 months!
6 months! wow good luck, you dont kneed to be as anal as i was studying to pass, but all i would recommend is that studying the question banks doesn't really bring you the knowledge it will pass the exam im sure, but you wont know much after. try and get a general grasp at least of things, like in my videos ;) thanks fr watching and good luck!
Good explanations. I'm a Spanish speaker and I really understand your English. Are you Spanish isn't it? How can you speak very good English? Share some tips!!! I want to fly 737 aswell 😀
vete a vivir a UK una temporada, es la unica forma de aprender un idioma. Y no vivas con españoles cuando estes fuera del pais tampoco jaja Thanks for watching
Hi guys. Great idea to summarise knowledge in videos. Doing ATPL course online. Course exam has a question: "On a polar stereographic chart where the Earth convergence between 2 points located on the parallel 60°N is 20°, the great circle maximum cross-track difference with the straight line joining the 2 points is: 9.2NM? 30NM? 40NM? 4.0NM?" where are some thread that people trying to solve same on www.pprune.org/archive/index.php/t-152293.html I figured out that: delta long = convergence / sin (60) = 23.1 Now if we draw parallel circle at 60N we will have its radius = earth radius X cos (60) = 3440 / 2 = 1720NM so now we have triangle: point at earth axis there small circle of parallel slice it, start point and mid point of the straight line. it has an angle 1/2 of the delta long = 1/2 23.1 = 11.55 now we can calculate a distance between point at earth axis and mid point of the straight line: R x cos (11.55) =1720 x cos(11.55) = 1685.17NM It gives us a distance between rhumb line and "straight" line: 1720-1685.17 = 34.83NM Now assuming that lengths are ordered in order: straight line, great circle, rhumb line. we can assume that "great circle maximum cross-track difference with the straight line" should be less then rhumb and straight and brings us to choice of 30NM. After I calc it I realized that it is not a straight underground tunnel. but straight line on a polar stereographic chart. Still can't find a good answer.
WOW! Why would nobody else explaining this convergency topic almost so perfectly like you!? The only think missing is you did not explain when do we add and when do we subtract the result from the rhum line when calculating the initial and the final great circle. Thank you!
The Witcher explaining witchcraft! haha, great, clear and concise explanation, thank you very much!
I just passed Gnav, Met, MB and PoF, And I seriously dont think i would have if it wasnt for these videos. Things that were complex and hard for anyone new to understand was made so simple, yet so well explained by @PilotEd. Thank you so much!
Thanks so much mate, had a bit of a break but theres more on the way :)
You need more recognition.
thanks for the kind words! share it wrround :) and thanks for watching
PilotEd you're welcome. I will gladly share it around. Keep up the good work :)
thanks for watching :)
Great video!! I am preparing gnaw exam and your videos are helping me a lot!
Shame you stopped making & posting contents. You make ATPL student life easier
That’s a great explanatory video.. I had quite some difficulties understanding the concept until I watched your video! Thanks a lot and keep up your great work :)
glad to help! thanks for watching, more on the way
Great video!
Great explanation thank for the time that u spare for us newbies 🙂
Agree with Farhan...I finally understand this! My brain has reconstituted and turned from goo to grey matter again! So grateful for your explanation with diagrams though :)
thanks so much! more on the way :)
Wow, I love the way it's explained! I'm starting my integrated ATPL in 2 weeks so I can see this being very handy!
Any tips? I haven't studied in over 5 years and now have to study and sit exams on the 14 subjects in 6 months!
6 months! wow good luck, you dont kneed to be as anal as i was studying to pass, but all i would recommend is that studying the question banks doesn't really bring you the knowledge it will pass the exam im sure, but you wont know much after. try and get a general grasp at least of things, like in my videos ;) thanks fr watching and good luck!
Amazing explanation,, I just found your channel and I subscribed after watching my first video here. Great work 👍🏼👍🏼
superb
ur amazing .. personally love the work ur doing .. its really hard to find explination .. u make it easy
thank you :)
You are much better explaning than my GNav teacher
Haha thanks :)
THANK YOU SO MUCH
why do we use cos for departure and sine for convergency formula ?
Love you mate
Thank you so much. Keep up the great work!
thanks for watching! more on the way
welcome :)
Good explanations. I'm a Spanish speaker and I really understand your English. Are you Spanish isn't it? How can you speak very good English? Share some tips!!! I want to fly 737 aswell 😀
vete a vivir a UK una temporada, es la unica forma de aprender un idioma. Y no vivas con españoles cuando estes fuera del pais tampoco jaja Thanks for watching
@@PilotEd gracias por la respuesta. 👍👍👍👍
Good video sir.
cheers
Hi guys. Great idea to summarise knowledge in videos.
Doing ATPL course online.
Course exam has a question:
"On a polar stereographic chart where the Earth convergence between 2 points located on the parallel 60°N is 20°, the great circle maximum cross-track difference with the straight line joining the 2 points is: 9.2NM? 30NM? 40NM? 4.0NM?"
where are some thread that people trying to solve same on www.pprune.org/archive/index.php/t-152293.html
I figured out that:
delta long = convergence / sin (60) = 23.1
Now if we draw parallel circle at 60N we will have its radius
= earth radius X cos (60) = 3440 / 2 = 1720NM
so now we have triangle: point at earth axis there small circle of parallel slice it, start point and mid point of the straight line.
it has an angle 1/2 of the delta long = 1/2 23.1 = 11.55
now we can calculate a distance between point at earth axis and mid point of the straight line:
R x cos (11.55) =1720 x cos(11.55) = 1685.17NM
It gives us a distance between rhumb line and "straight" line: 1720-1685.17 = 34.83NM
Now assuming that lengths are ordered in order: straight line, great circle, rhumb line. we can assume that "great circle maximum cross-track difference with the straight line" should be less then rhumb and straight and brings us to choice of 30NM.
After I calc it I realized that it is not a straight underground tunnel. but straight line on a polar stereographic chart.
Still can't find a good answer.
MOYAAAAAAA, how are you my friend? :) hope all is well, ill have a look at your question when I get a chance :)
PilotEd yeah. Long time. Your mobile changed
So u draw a globe and make great circle lines on it as it was on a marcador map? Ok...