Thank you so much for the excellent video! It's very clear for me to understand the working principle of barometric altimeter. Only one question: does it take real-time air temperature into account when converting the air pressure to altitude? If not, what's the constant temperature to use?
Thank you so much for all these videos! It helped so much! I am a student pilot and had some issues with understanding certain parts of theory but now it is perfectly clear👌
Hi i have a doubt if we look at the graph for barometeric pressure and altitude it is not linear, but the dial scale in an altimeter is linear how and where is the linearity compensated in a mechanical altimeter
you absoluty right to make the reading linear the altemeter has correcting pins to increase or decrease the movement of the capsule accroding to altitude.
Hi, good job, I love this video. However I think the part about the expansion and contraction of the aneroid capsule is inaccurate. The pressure inside the capsule cannot stay the same, otherwise it wouldn't move an inch. The inner pressure of the capsule always adjusts to the static pressure around the aircraft and the capsule changes its volume as a reaction to this (Boyle's law). Or is there something that I'm not seeing?
Your comment really made me think, and I have to agree, if the capsule is able to increase its volume by expanding, the pressure inside must decrease. Assuming the capsule has 1 bar in it at sea level, then at lower pressure the capsule would expand until those pressures matched again, or until the expansion of the capsule reached its maximum or minimum movement values.
Hi Daniel, you are right, normally the aneroid capsule is sealed with a pressure lower than the standard, but for the purpose of the explanation I decided to use 1013 hPa as a reference to make it easier to understand how it works.
Hi sir I'm instrument technician,sir when we start testing of altimeter after assembling the 100feet needle can jumping like 0 to 06 or 06 to 09 like that,what is the problem please help me.
I use information from different sources to make the videos, mainly from ATPL, CPL & PPL Theory books from Oxford (CAE) and Jeppesen as well as some FAA Handbooks.
ruclips.net/video/L1ml_vIibJc/видео.html ... or, looking out the window! :)) 2000 vs 12000 feet will for sure look a little different (in VMC, of course :))
@ivansemanco6976 Russia and China are smart enough to use metres. Also GA in European countries often use metres also, just as many people here in Australia use metres. The international society of aviation actually recommends the use of metres globally, just that the US refuses to abide. Look it up. Soon aviation will go all metric.
@@chippyjohn1 its funny, years ago countries in Central Europe switch to feets… altimeters, all aviation maps and procedures are described in feets… we still have old metric atlimeters and VSI in the older planes. But officialy we are using feets, everywhere. So I lost hope for transition back to metric. But maybe you are right.
@@ivansemanco6976 The International Civil Aviation Organization (ICAO) is the governing body that makes official aviation recommendations. It might surprise a lot of pilots that for years, ICAO has recommended that the aviation world move completely to metric units (SI Units): Meters Kilometers Kilometers per hour Meters per second Liters Hectopascals Yep! No more knots. No more feet. The future of aviation is supposed to be 100% metric. Maybe. Someday. Don’t hold your breath.
@@ivansemanco6976 So if you look at the ICAO, Altitude and all other measurements a primarily supposed to be metric, stating that feet etc are an alternative.
QNH - Query Nautical Height (above Mean sea level, thus Altitude), QFE - Query Field Elevation (above ground, thus Height) :) Easy to remember this way
or nil height
For years I have tried to wrap my head around this and your video did the trick. Thank you.
Really the best channel on RUclips to explain the instruments!
Excellent presentation and very well explained with animation, easy for common person to understand, Well done.
Thank you so much for the excellent video! It's very clear for me to understand the working principle of barometric altimeter. Only one question: does it take real-time air temperature into account when converting the air pressure to altitude? If not, what's the constant temperature to use?
I've just learnt how to read altimeter. Thank you.
Well explained and this answered my questions. Thank you.
Very useful and clear video. Thanks for the work!
I got the whole thing right after your video.....thank you sooooo much😉
Honestly helped me so much! Earned my subscription!
Very well understood. Better than Byjus. Really loved it. Punnnteeyyyyy learn this one ra. It's enough for our exam. 😍😍
Thank you so much for all these videos! It helped so much! I am a student pilot and had some issues with understanding certain parts of theory but now it is perfectly clear👌
Brilliant explanation! Thank you
very good videos, might actually pass my theory now
Very nicely explained..kudos to your teaching
Really helpful please keep up doing this work👍
Very good.
One question.
What happens in air pockets ?
The pressure must be different causing error.
I was thinking the same. What about high pressure and low pressure weather systems
Thank you soo much this video helped a ton
Thank you so much, it was very helpful in understanding the concept!!
Hi i have a doubt if we look at the graph for barometeric pressure and altitude it is not linear, but the dial scale in an altimeter is linear how and where is the linearity compensated in a mechanical altimeter
you absoluty right to make the reading linear the altemeter has correcting pins to increase or decrease the movement of the capsule accroding to altitude.
Perfectly explained thanku :)
Thanks for useful presentation video! Thank you so much King😀
Very well explained and compliments
Very well explained thanks a lot
Hi, good job, I love this video. However I think the part about the expansion and contraction of the aneroid capsule is inaccurate. The pressure inside the capsule cannot stay the same, otherwise it wouldn't move an inch. The inner pressure of the capsule always adjusts to the static pressure around the aircraft and the capsule changes its volume as a reaction to this (Boyle's law). Or is there something that I'm not seeing?
Your comment really made me think, and I have to agree, if the capsule is able to increase its volume by expanding, the pressure inside must decrease. Assuming the capsule has 1 bar in it at sea level, then at lower pressure the capsule would expand until those pressures matched again, or until the expansion of the capsule reached its maximum or minimum movement values.
Perfect explanation
Thank you so much, it was very helpful ❤️❤️❤️
The pressure inside the aneroid capsule should be few Hpa 10-25 or it is calibrated to an internal pressure of 1013.25 Hpa?
Hi Daniel, you are right, normally the aneroid capsule is sealed with a pressure lower than the standard, but for the purpose of the explanation I decided to use 1013 hPa as a reference to make it easier to understand how it works.
Too good explanation 😇
Excellent thumbs up!
excellent content
Can anybody explain the full form of QNE, QNH & QFE
Thank you sir,please continue make informative videos
Can I ask you that pilots can adjust pressure same as pressure at airpot for land easy,Can't they.
Perfect. Thanks.
Hi sir I'm instrument technician,sir when we start testing of altimeter after assembling the 100feet needle can jumping like 0 to 06 or 06 to 09 like that,what is the problem please help me.
Hats off 👌
Thank you
Thanks for the info bro
It is really useful for me in preparing for my presentation 👍👍
How does isobar differ at times???
Hi Mai, they change depending on the atmospheric pressure conditions.
Fully explained
शुक्रिया 🙏
thank u
thanks gan
sir which book do you refer?
I use information from different sources to make the videos, mainly from ATPL, CPL & PPL Theory books from Oxford (CAE) and Jeppesen as well as some FAA Handbooks.
@@AviationTheory thank you sir.also make video on aircraft communication and navigation systm like hf,vhf,vor,ils ,adf etc..😃😃
Thank you for the advice, I’ll try to do so in the future!
Thanku
Sir the altimeter reference point depends on the mean sea level or the ground
thanks a lot about the capsule its evacuated there is no pressure inside it .
nice
Thank i
QFE-atomic pressure at air field level
QNH-atomic pressure at mean sea level
Altimeter
جہاز کی زمین سے بلندی کے ماپنے کا آلہ ہے ۔۔۔۔کیا یہ معلومات درست ہیں؟؟؟؟
2241hrs At ist on Sonday 18th June 2023
ruclips.net/video/L1ml_vIibJc/видео.html ... or, looking out the window! :)) 2000 vs 12000 feet will for sure look a little different (in VMC, of course :))
You sound like the water nozzle in Super Mario Sunshine
2021 and you are still talking in imperial. Altitude is in metres, pressure in bar.
In aviation, we are using feet for alt/height/elevation. Also in metric countries, as ICAO rules are set.
@ivansemanco6976 Russia and China are smart enough to use metres. Also GA in European countries often use metres also, just as many people here in Australia use metres. The international society of aviation actually recommends the use of metres globally, just that the US refuses to abide. Look it up. Soon aviation will go all metric.
@@chippyjohn1 its funny, years ago countries in Central Europe switch to feets… altimeters, all aviation maps and procedures are described in feets… we still have old metric atlimeters and VSI in the older planes. But officialy we are using feets, everywhere. So I lost hope for transition back to metric. But maybe you are right.
@@ivansemanco6976 The International Civil Aviation Organization (ICAO) is the governing body that makes official aviation recommendations. It might surprise a lot of pilots that for years, ICAO has recommended that the aviation world move completely to metric units (SI Units):
Meters
Kilometers
Kilometers per hour
Meters per second
Liters
Hectopascals
Yep! No more knots. No more feet. The future of aviation is supposed to be 100% metric.
Maybe. Someday. Don’t hold your breath.
@@ivansemanco6976 So if you look at the ICAO, Altitude and all other measurements a primarily supposed to be metric, stating that feet etc are an alternative.
Are you sad or depressed with your life and work?
In metres is more simple
Thank you