Difference Between QNH, QFE and QFF

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This video explains concepts of QNH, QFE and QFF and their importance in altimetry and the study of pressure systems that affect weather. It also shows the methods by which their values are calculated with graphic examples.
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Опубликовано:

12 ноя 2022

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Комментарии : 30

@HamedNarimani 5 дней назад

perfect video so useful, i just realised the reason for cold temp correction during approach

@weasel07 10 месяцев назад

Great video ! Outstandingly well done, close to perfectly explained

@lihaotao4912 Год назад

Good video which is more detail than FAA website document.

@RAFMuffler Год назад

Thanks for this video! Pretty simple and nice explanation of complex things.

@glennrodney7471 Год назад

Outstanding video!! Well done

@metaloper Год назад

Perfect explanation! Thanks!

@hayrlsylabigideydik6191 4 месяца назад

Great video! Thanks!

@aviatube4419 5 часов назад

Great video, but there is a question. In last example, how you get QNH 1010 hpa, what pressure lapse rate did you use to get it?

@kairetzu Год назад

Very useful !!

@farhanhaider5992 8 месяцев назад

Great explanation

@aviationworld1142 Год назад

thanks for sharing

@leonardoaraujo5520 7 месяцев назад

Thank you very much 🙏🏽🙏🏽

@renatoserzanink629 Месяц назад

Excellent explanation and video!! Congrats for the great work!! .. Just as a suggestion, the automatic "sniff" sound that comes up regularly should be less frequent.

@rachel03 4 месяца назад

this has been very helpful. do you have any more videos for meteorology ?

@chalitha22 Год назад

Thanks for the video!

@kevindetolli 25 дней назад

where can I check QFF for weather stations?

@Uluc994 4 дня назад

How did we find 105 hPa pressure difference at 5:41? Shouldn't 3000 ft result in 100 hPa difference?

@raccoonair Год назад

Very well done, related to meteorology, but for aviation purposes QFF is never used, QFE hardly, but provides height, relative to the airports elevation and will read 0 feet when landed, QNH the LOCAL pressure relative to sea level, providing altitude and the QNE relative to the standard plane of 29.92 inches/ 1013 hPa for Flight levels. Thanks for sharing though.

@raccoonair Год назад

@@Hans_Magnusson Yep, sorry. typo. I was already changing it 😀. Good stuff, nice animations... keep it up!

@AviationTheory Год назад

Hi Raccoon, you are right! This video is more focused on how these concepts are used in general meteorology rather than in practical altimetry procedures. You can find more detailed information on how they are actually used in aviation in our video “Altimeter Setting Procedures and Altimetry”: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-9VEVUVS7fbg.html

@raccoonair Год назад

@@AviationTheory Thanks; Aviation meteo is by far the most involved topic within aviation training. Good to see it now from a meteorological viewpoint, other than its view from aviation perspective.

@shanelodge391 Год назад

If you fly internationally you will encounter QFE, eg Russia.

@raccoonair Год назад

@@shanelodge391 Yes, I also know that the QFE is provided in clearances in the UK.

@farxadalizade599 Год назад

hi, thanks for video. but i cant find qff=1005hpa in last calculation. if T=28, 273+28= 301, 301*96/2000= 14ft. 2000/14= 143 hpa?? what in my calculation is wrong?

@s920356 Год назад

check 11:14 for 301*96/2000 you mean your QFE is 2000 hPa?

@ragzpar 6 месяцев назад

It should be 301*96 divided by 940 and not divided by 2000. Divide by Qfe and not the field elevation.

@pilottadeus3748 Год назад

"Now calculating the QNH is not so simple since the correct vertical pressure gradient to be applied must be determined as a function of the standard temperature as we descend." What exactly is meant with that sentence?