109 e4 performance

[Crumpp]

Nana, I think there is good reason to believe that the REAL obtained mean value was not on the centre line of the spec bandwidth. This is not how engineering works. The mean value of a produced thing is NEVER on the targeted nominal performance. My years in the engineering business taught me that. I have NEVER seen one produced thing that had its mean value on the nominal spec.

There is no credible reason to doubt Mtt's figures in the absence of facts.

Crumpp says:
They knew much more about their aircraft design than any of us and were being paid to deliver those aircraft. Misrepresenting the mean would have been quickly noticed by the customer.