Lateral & Vertical Navigation B747-400
ฝัง
- เผยแพร่เมื่อ 10 เม.ย. 2021
- JHello all, how do you do. I’ve repeatedly been asked to talk about Lateral Navigation (LNAV), and Vertical Navigation procedures and sequence on the Boeing 747-400 air the Boeing 747-8. To put it simply, before departure, part of the preparation by the pilots ( While passengers are checking in etc), is to insert the planned route in the Flight Management system. In doing this, the pilots pre-programme the lateral route and also give instructions as to how high and when the aircraft should climb on the route. The Lateral Navigation engages at 50 feet after lift off while the Vertical Navigation engages at 400 feet. The required altitude is pre-selected on the MCP ( Mode Control Panel) and any other en- route climbs or descents too. Have a watch and I hope you will have some idea what LNAV and VNAV are and how they work. By the way, the landing gear is down so that i could slow the rate of climb giving me time to explain the events at a slower pace as they happened.So in summary, LNAV is left-right while VNAV is Up-Down. Hope you like it. Later!😀✈️✈️✈️✈️
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Of all the Boeing pilots I've seen talking about LNAV/VNAV, none have been this instructive. The way you just show exactly which buttons you push and what they do explained in simple terms is unmatched anywhere else on TH-cam. Thank you, Captain!
My pleasure😊
I like the detailed view of the PFD from the pilots view on the ground and in air. That helps me with troubleshooting.
King of the sky ... Captain Obet. Loved the video 👍👍👍
Beautiful the digit movement on that mechanical altitude selector
I landed at your channel by mere chance, and wo wo wow, you answered tons of questions and queries I had in my mind for years! Thank you so much captain for the enormous effort and patience with which you make these educational videos for the rest of us, aviation "enthusiasts".
After this video I think I'm capable of flying a 747.... in my dreams only!
This is the best explanation about Lnav and Vnav! Thank you Captain !!!
Next time I would definitely prefer to sit at the copilot seat and help to set the gear up 😂
That was deliberate so that it climbs slower to allow me to explain the events as they happened, just like the tcas off.
@@pilot_obet7815 I think he mostly just wants to fly with you - and I don't blame him 😂 looks fun!
@@pilot_obet7815 Oh I see now. Thank you for your good intentions. Right. It takes just a couple mins to climb to clean speed with gear-up. Amazing. I keep watching your videos again and again. My sim in my house locate at Guangzhou. Quite close to HK. Now we are all opened finally. Hope we can meet and would like to invite you, my captain, to visit my sim.
A short video of MySim
th-cam.com/video/368bp749OzQ/w-d-xo.html
Best wishes.
Thanks very much, with educational, informative and entertaining sir.
Crystal clear explanations. Thanks Captain.
It's a mind-blowing explanation of the technical terms in an easiest way.Hats off captain
This is much better instruction than what I have seen in other channels. Thank you sir.
your style is so cool. Short and sweet - learning soooo much from you. Used to fly CX plenty before covid. Hope to return once HKG opens. LATER............
Wonderful video captain Obet! Loved your videos. Learn more pilots about B747 or another Boeing's too. You learn very well. This is very simple and easy to understand. I can only to say thank you. Thank you so much.
Thank you capt, I feel I'm a flying school already watching your videos. Pretty comprehensive
Love 747
Great Instructive video Thanks Captain.
Your videos are awesome!
Thanks for explaining
Great captain and great instructor!
Thank you 😊
Explanation is so clear thank you capt. ❤
Educational, short and spicy! Thanks again for your videos! 👍
Great explanation as always!
Amazing video as always Captain
Amazing knowledge , keep them videos coming
What a guy!!!
Thanks very much for the lessons.
great vids!
It took me almost 1 year to understand what lnav and vnav is... And then, I came across this video and it really did cleared my doubt... 😀 Thank you soooooooooooooo much capt !
My pleasure😀
Thx Capt
Later Capt beautiful video
Just awesome! 👍
Thank you! Cheers!
I appreciate your channel.
Thank you
@@pilot_obet7815 Did you ever get the chance to sneak in a supersonic dive when nobody was looking?
Great video explaining LNAV and VNAV from first person point of view but most impressive is you managing to get the aircraft off the ground (in the sim) and hold your camera at the same time
Most informative video I have seen on the 747 so far, keep up the good work captain!
Thanks
This is super cool
Thanks
Captain, very clear explanation 👍👍, btw what is meant by RNAV?thanks!!
Nice explanations out here!! One question sir. Can the pilots set takeoff thrust by pushing the thrust levers manually to takeoff power setting, without pressing the TO/GA button?
If yes, what would be the indications in the FMA?
What happened to “Positive Rate”🤔
@Pilot_obet: Just watching this video nth time :) and noticed that you didn't up the gears after positive climb and they remained down? Any specific reason ?
Awesome video Sir 👍, just a question, why the pilot usually call out "LNAV" after gear up in Cathay Pacific?
Just standard operating procedures. Companies are different
So just press the button not the v/s vertical speed button. To climb
Hello Captain, just wondering for most of the cases, once the aircraft took off, will the speed need to be built up first or the altitude? Which comes to your priority?? Thanks
Its sort of both. First though just after liftoff, you attain a climb out safety speed. Then you maintain this this until a specified altitude, usually 1000 feet before you start to accelerate to retract the flaps😊
Why sometimes I see when the speed tape indicates say flaps 10, pilots start retract to flaps 5 instead? Is that different plane models have different procedures or depend on their airline companies flight rules?
Was this adapted any NADP?
Hi Captain, Anand here, thanks for posting this video. For how long gears could be down after takeoff, will there be come kind of alarm ?
You can leave the gear for as long as you like. In this video, you will notice that I left the gear down. This was deliberate so that it would slow down the rate of climb for me to give the exploration
@@pilot_obet7815 I see! Thanks for the answer Captain.
Hi captain can I ask to explain what is flight director and how does the flight director work thank you.
Wow , i didn't know i could press altitude selector button on autopilot panel. I thought it's only possible in airbus... Well i guess this is the reason why autopilot didn't listen to me in vnav mod when dispatcher gave me a certain altitude.
THAT easy... I could fly that ...
Gear still down 😀
Captain why was the TCAS OFF?
The subject was LNAV/ VNAV
Good video, you forgot to get the gear up!
I’ve explained why- I didn’t forget. 😊 thanks for your comment.
@@pilot_obet7815 Oh, ok. Well then I will view it again.
Pilot obet your apu is running
Yes-I know
Quite a number of times, we may need to takeoff with the APU providing air conditioning air to the packs. This allows greater thrust from the engines. This avails a higher takeoff weight. So APU is NOT always OFF for takeoff 😄
@@pilot_obet7815 ohh meaning if you have alot of weight then you takeoff with apu, then when do you switch it off??