The Airspeed Indicator & Types of Airspeed (IAS, CAS, EAS, TAS & GS)

This video explains how an airspeed indicator (ASI) works, as well as the different types of speeds used in aviation, such as the IAS, CAS, EAS, TAS and GS.
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[@FlyingV53223]

I watched so many videos trying to understand all of these concepts and their uses and you video beautifully explains all of them to me. Thank you so much!

[@AviationTheory]

I’m glad to hear that!!

[@Anger-b4z]

Same here! Great work 👏 👍

[@winyte]

Same here, thank you.

[@saifkhan716]

​@@winytea

[@saifkhan716]

The 3 1:34

[@knightmare7756]

This channel is a gem for all the aspiring Pilots! 🖤 Thanks to whosoever is behind this✌🏻

[@steven7dong]

Now this is much better explained than Jeppesen book !

[@fewscattered]

I came here Before the beginning my PPL training and ı told myself fortunately ı found this channel. Main components are shaping in my brain. Thank you very much

[@Hirnilein0815]

Extremely helpful and easy to understand. Thank you very much.

[@Ealham163]

Crystal clear.... excellent explanation. Thanks a lot.

[@alaaalhazmi9546]

Very nicely done in a concise manner that is easy to understand, thank you for the video Aviation Theory.

[@zeeavan533]

I am 5 min in to the video and i can say, this is the best explanation. Please keep up the good work and keep making more videos.

[@abosaad905]

your explanation is very clear and understandable, please keep up unbelievable job.

[@shagunchikara681]

This is the bestest video I have ever seen on this topic.....the ease with which you have explained each and everything is really commendable...👏🏻👏🏻👏🏻👏🏻 thank you soo much for such an amazing explanation. Hoping for more such videos 🥺

[@enkavidhaigal1707]

The best video for trainee pilots...🔥🔥🔥🔥🔥

[@bevtecdiving6853]

Great Video helped me nail this for my PPL. Thanks

[@9611279300]

Hi , after watching so many vides , this one is the best so far , thanks for the info

[@sudarshankilari1769]

Understood clearly. Continue the great work

[@sachins4061]

Woww, your content is really amazing. The way you explain things is awesome! Keep it going man. Cheers!

[@4sumayal]

Thank you so much for such detailed explanation.

[@scienceshorts618]

Wow you explained in very simple way 😍

[@alirezaghaderi]

Best Video for this topic so far... Great job

[@faraht01]

thanks so much, you made it so simple I am so grateful.

[@chard6649]

Damnnn, you explained what wasn't in my online class

[@edge3037]

10:43 I am sorry isnt this the whole reason of the static port feeding into the airspeed indicator to equalize the pressure and density of the air, or am I missing something?

[@blondprince9507]

Beautiful presentation thanks for this interesting video

[@sanysany8818]

The best video about speed 👍

[@daniyalafzal2941]

Such a comprehensive video.. keep it up 🤞

[@nguyentuyen7750]

Very useful. thank you so much!

[@suhaniagrawal4148]

Best video on ASI 😊

[@Rohanbodele9631]

Very useful information

[@kyawzinhtun2159]

Clear to me,thanks a lot Sir❤❤

[@petrlicht]

Very good making video 👍🏻🛩️❤️

[@sarveshsharma-w1l]

exceptional

[@billionairecat5414]

Thank you-This is amazing!

[@ibrahimghalem6501]

Thank you very much for your helpful video

[@omiksvlog7832]

Hello! In the example of TRUE AIRSPEED, after getting the percentage as 20 then why do we multiply 110 x (0.20) 0r 110 x (1.20) to get the true airspeed 132?

[@romellcarranza4809]

i am really enjoying it and, also at the same time i am learning a lot..i hope that it is also in a dvd format so that i can buy it and be able to watch it if i don't have internet connection..if you do have it in a dvd format please let me know..i know that i'm an old-timer..thanks

[@blurossi7099]

Thanks a lot and keep going with videos ;) Good job!

[@jawadkhan3696]

What a channel ❤️

[@deepakgoyal3327]

Doubt: Regarding GS... The dynamic pressure on the Pitot tube should change in head winds or tail winds.. Thus the IAS itself should change in headwind or tailwind... For e.g. An aircraft in calm wind shows IAS 100 knots.. Assuming at 1000 feet.. TAS also approx 100 or 102 knots.. .. Now there's a strong headwind, whether the a/c IAS still show 100 knots with the same power by the engine?? I guess it should show higher speed as the pressure is higher now.... Sorry if it's stupid!!!

[@alexm20j]

Pitot is pronounced "pee' toe". Thanks for your good work for pilots.

[@kabzebrowski]

As far a PP tests go: would a deviation of 10Cº from the ISA correspond to roughly the same as 1000 ft (that is, +10Cº to +2% TAS) ? I'm aware the E6B is a logarithmic slide rule, so results become worser and worser approximations as one deviates more from the ISA.

[@alkei_i_am]

Amazing channel 😊

[@JeffreyRogers-jb7jr]

Very thorough and useful info from both a PILOT and CFI perspective. Thank you!

[@andrewchorley4002]

At 12:30 it said at sea level under standard temp IAS = TAS. Shouldn't it be CAS = TAS given that IAS does not include calibration for instrument errors and position errors ? or is it part of the assumption that you are in level unaccelerated flight with no instrument errors ? or am I incorrect? (love the vids thanks a million can't wait to start flying.)

[@dhirajpandey4181]

Thanku sir

[@elenastoenescu642]

Static ports open directly to the outside of fuselage. When aircraft is flying, there will be air flowing outside of static port. How does this not cause a vacuum effect inside the static port. Due to the Bernoulli Effect, as the speed of air flowing outside of fuselage increases, the pressure inside static port should decrease. This means, on same altitude, depending on my aircrafts speed, I will read different values on my altimeter. What prevents this ?

[@adjudantloic]

very nice videos thank you

[@chloemorgan1362]

Well done!!

[@sheikhzubairrizvi5628]

This is great ✨🔥

[@alphakilo329]

Perfect video

[@ВиталийОвчаренко-т7й]

An airspeed indicator is an essential instrument in an aircraft's cockpit that measures the aircraft's speed through the air, known as airspeed. It displays the airspeed in knots, miles per hour, or kilometers per hour. The airspeed indicator is a critical component in aviation as it helps the pilot to maintain a safe and efficient flight path. There are different types of airspeeds that an airspeed indicator measures, including: 1. Indicated Airspeed (IAS): This is the airspeed that the airspeed indicator displays. It is measured relative to the aircraft's reference point, which is typically the leading edge of the wing. IAS is the speed that the pilot sees on the airspeed indicator, and it is affected by factors such as altitude, air density, and angle of attack. 2. Calibrated Airspeed (CAS): This is the true airspeed corrected for instrument error, altitude, and air density. CAS is the actual speed of the aircraft through the air, and it is the speed that is used to calculate other important parameters such as lift, drag, and range. 3. Equivalent Airspeed (EAS): This is the airspeed that an aircraft would have at standard sea level conditions (ISA) and zero altitude, given the same lift and drag as the actual flight conditions. EAS is used to compare the performance of an aircraft at different altitudes and air densities. 4. True Airspeed (TAS): This is the airspeed corrected for the effects of wind. TAS is the speed at which the aircraft is moving relative to the ground, and it is the speed that is used to calculate ground speed. 5. Ground Speed (GS): This is the speed at which the aircraft is moving relative to the ground, taking into account the effects of wind. GS is important for navigation and is used to calculate the time required to reach a destination. In summary, the airspeed indicator measures IAS, which is corrected to CAS, EAS, and TAS to provide the pilot with accurate information about the aircraft's speed and performance. GS is then calculated based on the TAS and wind information.

[@AviAeroAsis]

Thank you!

[@sunnydindoyal7504]

Could someone please explain at 15:48. I don't understand the 11?

[@donmugambi5442]

Bravo

[@relaxingmusic9758]

Nice

[@ibeeadane4430]

Fantastic Broo!!!!!!

[@sajanchhetri4609]

It's such an amazing explanation! Thank you so much for the videos. It helps me a lot to understand the concept. 🫡🫡

[@pranayjain7454]

At higher altitudes the dynamic pressure is lesser, therefore ASI will under read.

[@simonbussey7530]

Great video!

[@yaakovhassoun8965]

9:40 that's one complicated formula...

[@Zaec2011]

I have a question about TAS calculation (14:48 in the video). There is OAT assumed as 5 grad. What if there’s 10 or 15? The rule of 1000 ft is applied only to density? How does temperature fits here. Thx

[@AviationTheory]

Hi! The approximate formula shown in the video is only accurate in standard conditions (ISA). If the temperature is different than that, then you have to use a flight computer or something similar to determine TAS. The temperature affects the TAS because it depends directly on air density, so if pressure or temperature change, the TAS will change as well.

[@Zaec2011]

@@AviationTheory Hi, thank you for the answer. I’m confused a bit here then in regards of standard conditions. Is not it 15 grad? Or it’s just really rough approximation and plus/minus 5 or 10 grad is not relevant? I mean fir this rule of 1000 ft.

[@AviationTheory]

@@Zaec2011 15°C is the standard temperature only at sea level. If you are flying at a higher altitude the standard temperature at that level will be lower. You can check out the video "Standard conditions - ISA" where it is explained in detail: kzbin.info/www/bejne/iWS3o36sfcaXg7M

[@lunayang3713]

How is instrument error corrected by the calibrated air speed? (Understood that positional error can be corrected by the calibration table)

[@AviationTheory]

Hi, when you correct IAS using the calibration table the resulting speed is the CAS.

[@lunayang3713]

@@AviationTheory I understand how the calibration table can help correct the positional error. But how would it help with the instrument error? Wouldn't the instrument error vary from one instrument to another?

[@AviationTheory]

@@lunayang3713 Oh I get your point now, well in theory CAS includes instrument error comprensation as well, but in practice I don´t really know how they determine it for each individual airframe and instrument.

[@MrEthanhines]

Why does the voice over say pitted-static system? and not Pea-tow-static system?

[@user-fw5gm6cv8p]

Ram Pressure - Static Pressure = Dynamic Pressure or FAA H 8083 15B: 5-8: D=S and T …..T also means ram?

[@AviationTheory]

Hi Ren, yes, in general terms we can say that Ram Pressure is equal to Total Pressure (or Pitot Pressure).

[@ghumkkadindian7891]

So TAS = CORRECTION OF POSITION ERROR + INSTRUMENT ERROR+ COMPRESSIBILITY ERROR+ DENSITY ERROR OR TAS= CORRECTION FOR ONLY DENSITY ERROR

[@xkris1000]

You say the IAS is not corrected at all. I'm just reading a manual of a PA28. That book is describing the IAS as the indicated airspeed corrcted for the instrument error. Good video though

[@AviationTheory]

Hi Kristian, looking at a PA28 manual, there is an airspeed calibration table to correct the IAS for instrument error (and obtain the CAS). Perhaps it is a misinterpretation of the IAS definition in the manual.

[@gokmen9928]

05:37 IAS (Pure dynamic pressure, no corrections) 06:20 EAS (IAS + Position&Instrument Error) 08:26 CAS (EAS + Compressibility Error) 09:47 TAS (CAS + Density Error)

[@SuperEddietv]

The computer voice has me burned out. good presentation on all your videos but the voice cooked me. Thanks. Signed, "Pit ut tube".

[@bernard.c4648]

Better than Bob Tait 😂

[@rlayers]

Maybe I'm just weird, but since Henri Pitot (a Frenchman) invented the pitot tube, this device ought to be pronounced PEE-toh. What is the point in naming things after people if we don't say their names correctly?

[@MVandemore]

Pretty sure this is computer generated speech from a text script. 'Pit-oh' is how a computer would read it, 'Pee-toh' is of course how it should be pronounced. That aside, it's really good explanation of various airspeed measurements.

[@artjackson8360]

Good content, but I’d enjoy it more if it were presented by a human.

[@markhyman359]

It would add validity to the video if the narrator knew how to properly pronounce "pitot".

[@dhonnytheodoro5754]

[@bennysingh5702]

Thank you so much . Your style of teaching is very articulate.

[@TBolt1]

I just wish the script had been read by a real person.

[@tisitabarman6633]

I couldn't believe before that so much detailed video can even exist, so much of hard work, hats off to you ❤❤❤

[@lovelycarHossein]

Thats perfect ❤❤❤❤ Thank you so much for this video

[@Vh98s]

Useful method to remember different speeds and their corrections: ICE T Is a Pretty Cool Drink IAS -> Instrument and Position error = CAS -> Compressibility error = EAS -> Density error = TAS Try drawing it on a paper, it will be even clearer!

[@thewatcher5271]

It's A Good Video But Teach Your AI To Pronounce Pitot As Pee Toe & Not Pit It. Thank You.

[@RohitSharma-zg2ys]

Outstanding explanation. No body does better than you .thanks

[@hedleyfurio]

A very well structured and presented video . This takes time and is appreciated . Well done on an excellent job 👍

[@n1msu]

Well done for what? this is plagiarised content, using copy and paste and using a poor chat bot as a narrator.

[@hedleyfurio]

@@n1msu was not aware of the plagiarism , but thought the structure was clear - voice was of no concern

[@hmabboud]

You are GOD sent! Thank YOU!

[@sooldt6591]

Explaned step by step and summary at the end, very good for beginners. thanks

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[@sanjay8925]

What an explanation,,,, thank you sir,, you made it crystal clear,,

[@e.b963]

I can't say thank you enough, everything is clear now!

[@Amr-le7nb]

Amazing :)

[@unseenawakenings]

Incredible knowledge and value. Much gratitude to you

[@joebuleuru7069]

Thank you so much Sir, This video has really helped me for my BAK exam. Your new aviation fun here. Really appreciate 🙏

[@luizlencioni6340]

Awasome video, you managed to give all these concepts in a very educational and simple way. Thanks!

[@belalex3160]

Wow.....1000% best explanations...!! Thank-you so much Sir.❤

[@freecash1682]

In this Vedio only I clearly get understood ab air speeds thank you so much 😍

[@Pilot.sakshi]

WOW , your all topics becomes crystal clear to our mind , Because of your beautiful voice and the beautiful way of explaining each topics!!!!!

[@abduahmad4167]

very elaborative yet simple presentation.keep the good work and thanks a lot

[@mleem5230]

Thanx ,,Excellent and clear narration with adequate and precise information.

[@jeepien]

Pitott tube: LOL Anyway, an "ideal" gas is *not* incompressible. It just means its density increases in exact linear proportion to the pressure applied. Real gases, e.g., air, don't show a straight line when graphed.

[@jacksos101]

It's a shame to go to all the effort of making this video, and then slap some AI voice onto it. My ears started bleeding about 3 words in...

[@saranraje]

All your videos are very informative, keep counting!!!

[@soodth]

This was the best explanation given not even book has given me a clearer content thank you

[@arun040479]

very good explanation , thanks a lot for making this video !!!

[@ArvindKumarPandey-v7s]

VERY USEFULLL BASIC INFORMATIONS

[@AadilAhmadme]

Thank you for the detailed video.