Originally Posted by
eckhard
Therefore, the three IAS values must actually be identical, even though the ASI readings differ.
In addition to what others (more learned than myself) have already mentioned, in your experiment the three IAS values are not identical as a correction from IAS to CAS is theoretically only valid for a specific airframe. For reasons you mentioned in your post, you can have different readings and therefore different IAS values. But fortunately, these differences are small and randomly distributed. I would change the wording to '...the three IAS values
should be identical...'
