On Sat, 17 May 2008 20:46:40 -0700 (PDT), "Ken S. Tucker"
wrote:

What you say is true, for a good experienced pilot,
who have flown disorientation exersizes.
But I'll provide this challenge, block off the speedometer
in your car and I'll bet you'll have a problem driving.
What happens to me is I drift up to 80 MPH, then
go "holy poop".

I disagree totally. You must be numb.

Both of my vehicles sound, feel, and act significantly different at 80
than they do at 65 MPH. In top gear of my Toyota, the RPM's are about
400 higher. On the same token, It's not all that difficult to tell
25 from 35, if I try.

The wind noise is different, the tach shows a different RPM, and the
corresponding engine pitch is noticeably different.

Back to the pilot...

The _change_ in sounds is a great clue, not just that it's all
different and steady.