If you are wondering about the test pilot workings and reports. There is a website where you can download the Naval Test Pilot School Fixed Wing Performance Flight Test Manual (long name). I don't know of the website address off the top of my head. I was lucky enough to have gotten a hard copy of the manual (a bit of a nerd) and it's really, really interesting for people who wonder where those POH type numbers come from and the limitations of those numbers.