For Performance Engineers
A question concerning aircraft performance data/charts etc.
In the given examples in the Aircraft Flight Manual or P.O.H., what level of skill is required by the pilot to acheive these values?
Are these numbers test pilot certification values, and unattainable to most of us?
Or are these results based upon some average pilot technique?
Is there any factor built into the charts to consider you never fly a brand new, perfectly straight a/c?
Finally, are these methods of determining performance charts consistent from say a boeing 777 to a cessna 172?
Your insight is always valued and appreciated.