why is the height of the airfield above sea level (calculated using (1013-998)*27), assuming standard temperature lapse rate, but from 998 to altitude, corrected by temperature correction?
We have to make some assumptions about our starting point if we don't know the information such as temperature at sea level, pressure, if the lapse rate is constant over height or if it changes and fluctuates depending on the daily conditions.
Hi Grant. In the example with FL200, shouldn't you have said "the Sea level pressure is at 998ha" instead of "QNH at a nearby airfield is 998ha"? Because you're applying the temperature correction all the way down to sea level, therefore the QFF (corrected Sea level pressure) is given. In a previous example in the Temperature video in Meteorology, you were applying the temperature correction not all the way down to sea level, but down to the airfield elevation, based on the known QFE value, and then adding that to True Altitude
One thing is not clear for me: if a plane is flying at FL200, that's mean that its altimeter is set to the 1013 hPa, so its altitude is 20000 ft. The indicated altitude is 20000 ft and not 19545 ft?
Altitude is always based off QNH. When we switch to 1013 or standard it is a flight level. By changing to 1013 we are now using flight levels not altitude. If the QNH was 1013 then the flight levels and altitude would be equal.
No idea haha. On the aircraft there is a selector for using InHg or hPa so normally you just select whatever has been said on the ATIS for the QNH setting then adjust the value accordingly.
I don't know what is in or out of the new syllabus. Most of the stuff will be relevant as aviation didn't suddenly change overnight one day. However, there will be a few things that I may miss out or provide that are no longer in the exam.
![MISSING: SLIM SHADY [Expanded Mourner’s Edition Trailer]](http://i.ytimg.com/vi/xh8qgHrOO1g/mqdefault.jpg)
People like you deserve a special place in heaven. Thank you
I bloody hate meterology
Amen 🥲
This really helpful god bless you 😊
You are a legend ! Thank you
is this helpful for ppl in south africa?
@@somiyasubedi9327 meteorology doesn’t change in each country lol
why is the height of the airfield above sea level (calculated using (1013-998)*27), assuming standard temperature lapse rate, but from 998 to altitude, corrected by temperature correction?
We have to make some assumptions about our starting point if we don't know the information such as temperature at sea level, pressure, if the lapse rate is constant over height or if it changes and fluctuates depending on the daily conditions.
Thank you!
Thanks so much
Fantastic videos! Thanks so much!
Glad you like them!
Thx Grant!😉
Hi Grant. In the example with FL200, shouldn't you have said "the Sea level pressure is at 998ha" instead of "QNH at a nearby airfield is 998ha"? Because you're applying the temperature correction all the way down to sea level, therefore the QFF (corrected Sea level pressure) is given.
In a previous example in the Temperature video in Meteorology, you were applying the temperature correction not all the way down to sea level, but down to the airfield elevation, based on the known QFE value, and then adding that to True Altitude
best
😀😀😀
One thing is not clear for me: if a plane is flying at FL200, that's mean that its altimeter is set to the 1013 hPa, so its altitude is 20000 ft. The indicated altitude is 20000 ft and not 19545 ft?
Altitude is always based off QNH. When we switch to 1013 or standard it is a flight level. By changing to 1013 we are now using flight levels not altitude. If the QNH was 1013 then the flight levels and altitude would be equal.
DRAW THE EFFING PICTURE 😂😂👏
Always!
How to convert hPa to inches of mercury?
No idea haha. On the aircraft there is a selector for using InHg or hPa so normally you just select whatever has been said on the ATIS for the QNH setting then adjust the value accordingly.
Is this the new ukcaa and easa 2022
I don't know what is in or out of the new syllabus.
Most of the stuff will be relevant as aviation didn't suddenly change overnight one day. However, there will be a few things that I may miss out or provide that are no longer in the exam.
Yes but they now expect you to use 30ft per hPa unless told otherwise
@@atplclass i am so pleased of your talent to suit almost 99 percent of the information from books in such a short video, thank you for all
p͓̽r͓̽o͓̽m͓̽o͓̽s͓̽m͓̽ 💃