Hi there, I have a question. I mean once we have estimated when we should descend based on 3:1 rule, adding wind component distance as well, then how do we deal with the fact that our descent rate will no more be the same as we get lower and closer to FAF for instance. I mean let's say we initiated initial selected descent at 2300 ft/min ( GS 460knots), how can we srill assume we'll descend at this rate when we 're lower and that GS will probably be around 350 knots ( 1750 feet/min'). Can the plane still descend at the initiate we did set in the mcdu?Or doed that rule alteady account for the fact that we'll have a lower GS anyway?
If you calculate a 3:1 descent, it means that you are calculating a 3 degrees descent (more or less) so the slower you fly the shallower will be your rate of descent. Yo are maintaining the descent angle constant not the rate.
Hey, many thanks for watching!! I'm glad you liked the video!! Don't hesitate to check the rest of the videos on my channel and ask me any question you may have!! I wish you a great day Gabriele Pilotclimb
Captain I have a doubt What should be the Indicated Air Speed, When I'm descending? And when I'm descending, Ground speed will reduce, so how can I get a fixed ground speed?
The IAS during Descent depends on your planning... If you descend faster you can start the descent later... Descent at constant GS is not a practice that we do
@@PILOTCLIMB so we change ROD when GS change Eg:- At FL 18000ft, IAS 280knots, GS 400knots ROD is 400*5 = 2000ft/min When FL 10000ft, IAS 250knots, GS 320knots Now ROD is 320*5 = 1600ft/min Is this correct?
Hello Captain Gabriel, Thanks for your video. I have again some questions. 1) in the approach chart for Dublin: What are the grey areas below the Glideslope? And what do the numbers mean like 1100ft, 820ft? Why do some charts have these grey areas and many dont? You showed us how to easily calculate a proper decend rate, but for 3.0 Degrees angle. But how do i calculate that for example: 3.4 Degrees? Also please can you describe mathematically how you have a vertical speed of 753ft/min when the groundspeed is 140knots. I want to comprehend that mathematically. Suggestions for new videos: How dou you calculate the runway slope? UP/DN. How do you calculate the runway slope for runways which dont have a linear slope? Like in Lanzarote, Düsseldorf. Thanks
Hello, I'm glad you want to learn and expand your knowledge. 1. The grey areas are called Sector Minimum Altitudes (SMA) they represent the minimum altitude at which you MUST NOT descend no matter what. However keep in mind that you should always follow the correct path during the approach. 2. I showed a very practical example of how you can quickly calculate the 3 degrees descent while flying the plane also, this is what you need to know to make sure you don't go below or above the path throughout your approach. This quick method works only with 3 degrees descent. If you want to calculate another descent angle you can use the formula used to calculate the angles on a triangle. In the end, the aircraft has a height a speed and a descent angle, thus, creating a triangle. The runway slope is indicated in the airport chart if you have one threshold elevation that is lower than the other you have a slope. I will most probably make a video about that soon. I hope I helped you!! I wish you a great day Gabriele Pilotclimb
@@PILOTCLIMB Thank you captain. Yes i want to learn more and you are a good teacher. Luckily i started to learn many years ago. But i still want more input. Thanks for the SMA. So never decend into the grey area. Concerning runway slope, it would be also interesting about what you need to consider for non linear slope. Lanzarote airport is a famous example if i am not wrong. Concerning angle of 3.4 degrees i will try to calculate as you suggested.
@@ahmedsmart1120 Good Morning, I will make more videos about runway characteristics!! So Stay tunes!! Yes, you don't want to descent into the grey area, but also take always into consideration the altitude restrictions of the approach. I wish you a great day, Gabriele Pilotclimb
Hey, thanks for watching! I hope the video helped you!! The calculation is only applicable to the 3 degress descend, the vast majority of the approaches have a desced angle of 3 deg. If the descend angle is different than the 3 degrees, you can check what rate of descend is requried in the apporach chart. Let me know if you still have any question. have a great day!
In case of change in angle, we can apply the formula i.e. angle of descent* GS (npm)*100=rate of descent for the angle used in the formula. Please correct me pilotclimb captain if I am incorrect? Consider, the wind factor and atmospheric pressure below the descent point.
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So simple. Thank you for the great explanation. Now on to ToD and I will be set 😊
Great! Thanks for watching!
We love you Gabriel and waiting for you to come back and amaze us as always ❤️
Many thanks for your great support!! I'll be back!! I wish you a great day!
Excellent video. Thanks.
You are very welcome!!
Hi there,
I have a question. I mean once we have estimated when we should descend based on 3:1 rule, adding wind component distance as well, then how do we deal with the fact that our descent rate will no more be the same as we get lower and closer to FAF for instance. I mean let's say we initiated initial selected descent at 2300 ft/min ( GS 460knots), how can we srill assume we'll descend at this rate when we 're lower and that GS will probably be around 350 knots ( 1750 feet/min'). Can the plane still descend at the initiate we did set in the mcdu?Or doed that rule alteady account for the fact that we'll have a lower GS anyway?
If you calculate a 3:1 descent, it means that you are calculating a 3 degrees descent (more or less) so the slower you fly the shallower will be your rate of descent. Yo are maintaining the descent angle constant not the rate.
Salve capitano.....ha un accento italiano....grazie per i suoi video
Ciao, mi hai scoperto subito!! 👍 Grazie a te per guardare i video!! Dammi del tu!!
A presto
Gabriele
Mabuhay Capt what is the significance of 35ft in take off and 50ft height in landing thanks a lot
Hey, many thanks for watching!! Those are minimum crossing Threshold height that you should respect during your take-off and landing..
Excellent, thank you.
Many thanks for the kind comment..
good job
Hey, many thanks for watching!! I'm glad you liked the video!!
Don't hesitate to check the rest of the videos on my channel and ask me any question you may have!!
I wish you a great day
Gabriele
Pilotclimb
Captain
I have a doubt
What should be the Indicated Air Speed, When I'm descending?
And when I'm descending, Ground speed will reduce, so how can I get a fixed ground speed?
The IAS during Descent depends on your planning... If you descend faster you can start the descent later... Descent at constant GS is not a practice that we do
@@PILOTCLIMB so we change ROD when GS change
Eg:- At FL 18000ft, IAS 280knots, GS 400knots
ROD is 400*5 = 2000ft/min
When FL 10000ft, IAS 250knots, GS 320knots
Now ROD is 320*5 = 1600ft/min
Is this correct?
Hello Captain Gabriel,
Thanks for your video.
I have again some questions.
1) in the approach chart for Dublin:
What are the grey areas below the Glideslope?
And what do the numbers mean like 1100ft, 820ft?
Why do some charts have these grey areas and many dont?
You showed us how to easily calculate a proper decend rate, but for 3.0 Degrees angle.
But how do i calculate that for example:
3.4 Degrees?
Also please can you describe mathematically how you have a vertical speed of
753ft/min when the groundspeed is 140knots.
I want to comprehend that mathematically.
Suggestions for new videos:
How dou you calculate the runway slope?
UP/DN.
How do you calculate the runway slope for runways which dont have a linear slope?
Like in Lanzarote, Düsseldorf.
Thanks
Hello, I'm glad you want to learn and expand your knowledge.
1. The grey areas are called Sector Minimum Altitudes (SMA) they represent the minimum altitude at which you MUST NOT descend no matter what. However keep in mind that you should always follow the correct path during the approach.
2. I showed a very practical example of how you can quickly calculate the 3 degrees descent while flying the plane also, this is what you need to know to make sure you don't go below or above the path throughout your approach.
This quick method works only with 3 degrees descent.
If you want to calculate another descent angle you can use the formula used to calculate the angles on a triangle.
In the end, the aircraft has a height a speed and a descent angle, thus, creating a triangle.
The runway slope is indicated in the airport chart if you have one threshold elevation that is lower than the other you have a slope.
I will most probably make a video about that soon.
I hope I helped you!!
I wish you a great day
Gabriele
Pilotclimb
@@PILOTCLIMB
Thank you captain.
Yes i want to learn more and you are a good teacher.
Luckily i started to learn many years ago.
But i still want more input.
Thanks for the SMA.
So never decend into the grey area.
Concerning runway slope, it would be also interesting about what you need to consider for non linear slope.
Lanzarote airport is a famous example if i am not wrong.
Concerning angle of 3.4 degrees i will try to calculate as you suggested.
@@ahmedsmart1120 Good Morning, I will make more videos about runway characteristics!! So Stay tunes!!
Yes, you don't want to descent into the grey area, but also take always into consideration the altitude restrictions of the approach.
I wish you a great day,
Gabriele
Pilotclimb
What about if the angle of descent on approach is 3.5 ‘ , 4 or 5 degrees, how do you divide your ground speed ? 🤔
Hey, thanks for watching! I hope the video helped you!!
The calculation is only applicable to the 3 degress descend, the vast majority of the approaches have a desced angle of 3 deg.
If the descend angle is different than the 3 degrees, you can check what rate of descend is requried in the apporach chart.
Let me know if you still have any question.
have a great day!
In case of change in angle, we can apply the formula i.e. angle of descent* GS (npm)*100=rate of descent for the angle used in the formula. Please correct me pilotclimb captain if I am incorrect? Consider, the wind factor and atmospheric pressure below the descent point.
@@Rafian1924 lol you think you can do all those calculations as you approach the runway and communicate with ATC?
Don't hesitate to comment on the video with your questions !!! Happy Landing!!
You are a jets captain and can't afford a good microphone for your recording? it was hard to understand your accent at some point in the video.