Well I personally only have data on the P-40 but would be willing to hunt for more. Was figuring that if you gave us links, or such to the reference information that you have we could run our own tests, and compare it to the data.
Thus giving us a baseline to work from.
I.E.(In Example?)
U.S.A.A.C. Flight Manual for the P-51.
Says that the P-51D max speed at 10,000 Ft. Is 378IAS. (I don't know the speed they claimed, documented, just making up numbers here.) WIth 50% Fuel and NO Weapons. No Drop Tank. Allison Engine.
Well I climb in my AH Virtual P-51, I time its so I have exactly 50% fuel when I get to 10K and I open the throttle. And I only get 376 Max IAS.
Well we have a 2 kt/MPH IAS variance here (and I wouldn't sweat 2 mph/Ias unless there seemed to be a skewed curve or pattern)
But I would be able to tell if my Virtual P-51 was performing to the numbers according to the data you were working from.
We could all run flights at different alt, and compare our numbers, and if there were difference, try to figure out why.
Hopefully everything would go according to the numbers, but you never know.
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"I could feel the 20MM Cannon impacting behind me so I made myself small behind the pilot armor" Charlie Bond AVG