Dariuszw,
Thank you most sincerely for adding me to your ignore list, now that is indeed a compliment!
For the record before leaving this thread forever, yes, I do indeed accept it as truth that Jet aircraft at high altitude do indeed spend most of their time above Mcrit, even during climb. No, I don't believe it, belief is a matter of faith, I accept because it is
FACT'
See you in the next incarnation.