Jana,Thanks for the quick reply. I understand the amount of time and effort it would take to do this testing -- that's one of the reasons why I just had to ask. (Although in the real world this testing is accomplished in a matter of weeks, not months or years.)Don S.

>the reasons why I just had to ask. (Although in the real>world this testing is accomplished in a matter of weeks, not>months or years.)Really... WOW !! I wasn't aware the tests were done in a matter of weeks. I thought it took much longer, considering that real engineers don't have the luxury of pressing "Crtl-;" to reset their flights at the end of the runway, nor can they go to "weather" and change the temperature at the touch of a mouse button.Interesting...Regards,Jana Kankesanwww.tomaflex.net