Quote:
Originally Posted by SlipBall
I would think that the most accurate data would be from the manufacturer/and military test flight's, prior to the placing of large goverment orders for the aircraft in question. That data is available for some of the aircraft, if not all of them...it would take alot of leg work, and years of your life to examine
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Actually these kind of data concern prototypes, or non-fully equiped aircrafts, that were often particulary well built and adjusted, with carefull and well done covering to get the best performances.
Data from production aircraft are IMHO more representative of combat aircraft.
Data for production aircraft can be retrieved from in-flight receipt test reports (when they were conducted, and when the test centers archives are available....). Normally in each production serie, some machines were intensivelly tested by the respective air forces in order to accept the production serie.
... but... even in these tests, you can find discrepancies in data recorded in test receipts for the same serie.
... I totally agree with your last sentence.