[Six Nifty .50s]

Which performance figures?

Originally Posted by Franek Grabowski

All! ?

Had to step away for awhile, but I see now that you're building a case around aircraft specifications, not actual results and skill of the pilots. And you quoted specs from Joe Baugher's Web site (yikes!) it is riddled with technical errors. Speeds given do not match cited material from RAF and USAAF trials, especially in the case of the P-51A/B/D.

Originally Posted by Franek Grabowski

I do not see any reason to believe the personal engagement's experience is a decisive factor when discussing those matters

And yet you frequently call upon personal experiences of a few Polish pilots.

Since you are more interested in numbers than pilot opinion, the 4th Fighter Group had a better combat record with the Thunderbolt than with the Spitfire. They managed to do this with early P-47s, lacking later refinements and plagued with mechanical troubles -- the same situation being repeated with the P-51B a year later.

The 56th Fighter Group did better in the P-47 because USAAF fighter pilots were generally better trained than RAF. Some members of 133 Squadron mentioned the difference was very noticable. The standard of entry for RAF pilot training was lower, and they often accepted rejects from other air forces. As of consequence there was a larger portion of RAF flyers who were not proficient at flying, and therefore I find it amusing that you focus so much on 'technical specifications'.

Originally Posted by Franek Grabowski

while we are at German pilots' opinions, by 1944 they believed every aircraft was a US one

No they didn't.

Many encounters took place at close range, often near enough to see the enemy pilot as he flew past. And, it was much easier to identify airplanes with a natural metal finish, blinded by the glare of sunlight reflecting off the surfaces. Then there was the noses and tails painted in bright colors and checkerboard patterns...

Originally Posted by Franek Grabowski

When I used a lack of fuel argument in an another discussion, Don Caldwell gently expressed remarks that fuel deficenties started during or after Normandy Campaign

This differs with opinions from several RAF and German pilots. Both said that medium bombers and RAF fighter patrols were usually and intentionally ignored by the Jagdwaffe from late 1943.

Originally Posted by Franek Grabowski

USAAF considered it is easier to not to allow Germans to climb rather than to escort bombers. Mustang did it possible

But it was not easier until the last few months of the war, because the sky is a very big place. Heavy bombers flew at high altitude and that is where most of the air-to-air combats were decided.