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The Academy - Players helping Players
1

Something I’ve never really wrapped my head around is what the purpose would be between knowing that IAS and TAS are different.

I THINK I know what they are: TAS is simply your speed, in the basic way anyone would think about it; and IAS is how the speed your machine is “feeling” like with different factors taken in to account like air pressure/altitude, ambient temperature/humidity (which is just an extension of air pressure anyway). Is this right?

And if so, what is knowing your IAS good for?

Thanks in advance.

2

IAS is the main speed measure used by pilots - at least in civilian a/c - it is a better indication of stall speed for example - and therefore how far off it you are.

See Indicated airspeed - Wikipedia

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3

So would it be correct to assume it’s the better judge of your machine’s performance at a given altitude?

4

Look around hte net - there are plenty of informative sites that can give you more information than me - I only hired pilots, I’m not one myself!