Inaccurate performance data for BOB fighters in COD comparing to RL data

[Ernst]

Originally Posted by klem

Well a key point about the spitfireperformance website is it gives us data collected at the time in reports written at the time. It is unlikely that Russian test organisations would have got any nearer to the true performance figures than the companies building the aircraft and engines and their prime user the RAF and its test organisations.

Yes, but the companies wants to sell the aircrafts. That tests were made with unique prepared aircrafts for sure. A front line fighter would perform different. Some aircraft were easier to maintain and repair and were most of time more "combat ready" and "trimmed" than others, or even the perfomance downgrade by wearing should be much less. Even the way the aircraft is painted or waxed made a big difference in performance. Do you think 30km/h or 60 km/h should be a great difference? An 110 nightfighter with 52 victories, named Martin Drewes, stated that it was possible to fly 30km/h faster if they do not wax their aircraft or even removing the camouflage. He says: Better to fly faster than have a better looking aircraft.

Conclusion: There are many variables in the performance showed in this tests. For sure that aircraft were prepared or used advantageous methods of analysis to match the performance requiriments in the contracts. Problaby if an aircraft had more difficult mainentance in front line it ll be most of time deviated from that "original" performance.