Thank you all guys! Finally this is clear into my mind as well!
Overall thanx to Old Smokey for the explanation via PM! It has been really helpfull!!
I really have to say that this chapter is not so well explained in the flight schools..But better late than never..isn't it?
I just have one further question concerning EAS and CAS. Is there a kind of rule of thumb which tells us the amount of change during our increase in speed?
For example at 200 kts CAS we get 10%less on the EAS due to the compressibility error..or something like that (i'm just inventing)
Thank you again!
Regards,
bio161