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- เผยแพร่เมื่อ 3 เม.ย. 2020
- This is the first video in a short series covering altimetry. This video looks at the different pressure settings available to pilots - and why we need them - and looks at the relationship between them.
Video two looks at Density Altitude and True Altitude, and shows you the method I use for True Altitude questions. Video three is a deeper look into more true altitude exam questions.
If you have any questions about any of this, or have ideas for future ATPL Tips videos, leave me a comment below!
Video 2: • ATPL Tips - Altimetry ...
Video 3: • ATPL Tips - Altimetry ...
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![QNH, QFE and QNE - [Altitude, Height and Flight Levels explained]](http://i.ytimg.com/vi/7rjL2CSiCvQ/mqdefault.jpg)
I can not understand why there are 6 thumps down. The explanation is brilliant. The are always wierdos in this world ! A million thumps up
Hi Tom. Not sure you will read this as you don't seem to be around here anymore, but wanted to thank you for sharing your knowledge/methods.
Passed my last ATPL exams today (gnav) and you helped a lot. Many Thanks🙏
Hi Cedric! Glad to hear you passed your Gnav exam!! Yeah I took a long break from videos while I was doing other bits of training, but I'm hoping to put some more out soon! Thanks for the support!
@@ATPLTips hoping to have you back soon TOM, ALL THE BEST !
Extraordinary videos, very well explained, very good sketch's only one recommendation. The QNH calculated by QFE and not vice versa (QFE is the actual measurement of pressure in the airport and QNH is the reference of this pressure to the mean sea level - MSL)
awesome video! thank you for taking the time to put this together
Excellent as always Tom
This is not just a thumb up. A well done, great job.
Just excellent. way better than my ground school Instructors. way to go Tom!!
Hi Tom, you are simply wonderful !! thumbs up buddy !
Nicely explained and very clear diagrams. I am going to follow through with your other videos on this subject and I HOPE that I will understand when to usre each or which to expect from atc. Nice one.
Hey Tom . Thanks a lot for this video . I am preparing for CPL and this video just saved my life! keep producing such videos...thankyou!
That’s amazing to hear (I assume you mean it saved your life figuratively....!). Good luck with your CPL!! Thanks for leaving supportive feedback :)
thanks a lot mate... you are doing a good job , keep up
Thank you for this, has helped me out a great deal!
Thanks Harry! Glad to be of use!
Thank you very much, very helpful mate !
Hi Tom, your videos are by far the most helpful I've watched, thank you so much
I wish you had some filmed course I would definitely pay for it. no brainer.
thanks again!
Good explanation. Am beginning to understand the subject matter. Thanks. Very helpful
Awesome explanation Sir. Thank you
Very easy to understand tutorial ...Great job !!!
Thanks for the feedback!! :)
Your videos are so good, seriously. Please make more :)
Thanks Paul! More on their way in the new year!
Thank you so much! Followed.
This was really helpful!! Thanks a lot!
Really glad to help!!!
Thankyou soo much man❤️
thank you very much mate for this Great and clear explanation
Thanks for the feedback!
Hi Tom. Thanks for a great vid and excellent explanation. I'm studying for my CPL(H) but your vid just did it for me, out of ALL the info I could find. Keep'em coming, please.
Ah that's great, so happy to help!! And I really appreciate the feedback!!
These videos are all great! Thank you so much for making these, please keep going!
i know Im asking the wrong place but does anyone know a method to get back into an instagram account..?
I was stupid forgot the login password. I love any tips you can give me!
@Cayden Tripp Instablaster :)
@Elisha King I really appreciate your reply. I got to the site through google and I'm in the hacking process atm.
Looks like it's gonna take a while so I will get back to you later with my results.
@Elisha King It worked and I finally got access to my account again. I'm so happy:D
Thanks so much, you really help me out :D
@Cayden Tripp happy to help =)
THANK YOU A LOTTTTT!!!!
Thanks.. This was really helpful.. Very nicely explained.. 👍🏼
Thanks!
Hi my friend.. excellent work.One extra tip is to do QNH-1013 and not the opposite because when you find negative number it's more easy without drawing to understand that you must subtract.keep going the good work.
Greetings from Greece
Great tip! Thanks!!
I have learn it today i think i wont hesitate while doing my presentation👌😊
Great to hear!!
Heyy there,
Leme get straight to the point
After watchin ur vid, everything literally became so easier to understand and i think no one can explain any better as u do so im hoping u will still continue to make more videos on navigation and meteorology and other aviation courses....I’d really appreciate it....
This is incredible to hear. I really appreciate the feedback and I’m glad to help! I have more videos planned but probably not until January. Do me a favour? If it helps then tell your friends! If I hit 1000 subscribers I can start weaning some pennies from TH-cam 👍
@@ATPLTips ofc imma tell my friends to sub n hopefully u reach ur goal...
Hoping to see more of ur vids buddy theres no chance i fail my exams now😂
thanks a lot
Hey - I'm curious how'd you managed to set your calculator so it shows 2 last calculations stacked one after another. It is quite helpful I guess. Mine shows only 1 calculation with whole lot of space free.
I have one question?when i studied Atpl the definition of qne was absolutely different.QNE was not pressure setting,it was an altitude.It was used for mountains areas where you can set on your sub scale QNH due to limitations (950-1050 hps if i am not mistaken).So Definition of QNE was ,it is an altitude not Flight level, when you set 1013 hps you see on your altimeter current elevation of aredrome where located in mountains areas where elevation is very high
What
is the
QNH and the density altitude?
how we can account QNH ?
I need a help to make sure that i understood the concept correctly, please help.
Example:-
Airport elevation- 5600 feet.
QNH- 1023 hPA
QNE- 1013.25 hPA
PA-?
[Reference used -1hPA=30 feet]
My Answer:-
PA=
5600 + ((1013.25 - 1023)*30)
5600 + ((-9.75)*30)
5600 - 292.5
=5307.5
Since PA is the height from QNE (1013.25hPA) we substract or if follow the math, then plus minus = minus.
However, if QNH would be less than QNE, then we would have added the calculated feet into the elevation rather substracting.
Am i right?
Memerlukan lebih ramai orang jadi sebarkan video ini lebih banyak
I have one question. I read in some books, QNE was not standard pressure (1013) but it was the altitude indicated by altimeter with 1013 setting when aircraft is on runway surface.
This is true, I don't know why, but there seems to be a widespread misunderstanding of QNE, especially from pilots. To quote the UK Manual of Air Traffic Services...
"During conditions of exceptionally low atmospheric pressure it is not possible to set QFE or QNH on some aircraft altimeters. In these circumstances an aerodrome or runway QNE can be requested. The QNE is the reading in feet on an altimeter with the sub-scale set to 1013.2 hPa when the aircraft is at aerodrome or touchdown elevation."
Folks seem to use QNE as the same thing as STD/SPS. It is not. It is used very rarely.
This is more than prefect can you please send me the pdf that you told us about the Skitch of qnh and qne
I’m studying for my théorical drone pilot exam out here in France and so far , I have read in my books that it’s 1hpa=28 feet 😂, I watch videos of different explanations about this and most of them state 1 hpa= 30 feet ...
Hi Joel, thanks for your comment! The reason there is some variation is because there is actually no perfect answer. My advice is: if your books say 28', then use that figure. Different exam boards use different figures; I'll try to summarise why:
Remember, atmospheric pressure measures the mass of the air above the place where the reading is taken. In standard atmosphere conditions (1013hPa & 15°C @ sea level), 1hPa = 27' at sea level - however, as altitude increases there's less atmosphere above the station taking the recording, meaning the number of feet per hectopascal increases. Even if you stay in ISA conditions, at 10,000' 1hPa = 37', at 20,000' 1hPa = 50', and at 38,000 1hPa = 100'. *Also* changes in air mass temperature will affect what's going on in the air parcel too: Colder air is more dense, warmer air is less dense.
Ok. Long answer, I hope that helps. Good luck with your drone exam!
Thank you very much for taking the time to explain this 🙏🏾🙏🏾
Here is Q.. qnh is equal to 1013 and ELEV is 0 then we have a rare case of 0 PA.. what does that mean from pilot point of view?
thanks and lovely video
Hi Andrei, thanks for the question. I guess in that scenario the temperature would also be 15*C, so you’ve got an ISA day (I’ve only actually flown on a day like this once).
From a pilot perspective it wouldn’t affect much, other than meaning there would be effectively no altimeter change when flying through the transition layer, and it would mean standard performance out of your aircraft (density altitude would equal pressure altitude and elevation too).
hello Tom, how can I contact you?
Hi! You can email me at: tom[at]atpltips.com :)
This is a good and carefully structured aviation teaching video. However, language is powerful and I believe that you forgot one crucial detail that is pedagogically not trivial in my opinion: It is vitally important to remind your listeners bluntly that both QNH and QFE are "altimeter settings" (specifically, pressure numbers we put into the Kolsman window). However, and I think this issue causes much confusion for any beginner, QNE is *NOT* a pressure number we input to the Kolsman window. QNE is an ALTITUDE. It is the altitude indicated on the instrument whenever the Kolsman window has been loaded with a very important but arbitrary value. Thus. . . . .QNE is the **Pressure Altitude** (as you mentioned in passing). If we set 29.92 (inches Hg) in the Kolsman window, the altitude shown by our altimeter is Pressure Altitude no matter where we are flying over Earth and no matter the local weather below on Earth or around us locally. Every pilot here in 'Murika must set 29.92 inches Hg in the Kolsman window before climbing above 17,999 feet MSL.
The way you said altimetery and spontaneously put your hand at the head it showed how much it might have bugged you as its bugging me right now
New syllabus LO state 1hpa = 30ft.
Thanks for the update!
you left out inches. North America doesn't use hpa
Yeah why does America have to be awkward 🤣
Matha, physics
atplquestions No 614308
Thank You :)
Hi Victoria! Can you email me that question to tom@atpltips.com please? :)