you have to correleate your airspeed to ground speed, ... +++++++++++++
Why? Anything other than TAS is irrelevant. TAS (IAS or CAS) is all the pilot has to inform him of the onset of a stall. I agree that it would be dufficult to establish and quanyify TAS at stall (or any other flight situation) due to position error, instrument error, calibration and even static source - thus important to establish the stall speed in terms of IAS for each airplane. Have a great weekend Steve
