Gaston Marty
Canada
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Hello everyone.

I just wanted to add some corrective information that has come to light in further research in the year since I have put out the "definitive" version of my "Air Force" variant online:

http://forums.ubi.com/eve/forums/a/tpc/f/4811054957/m/503108...

I have in the last year re-read hundreds of WWII air combat accounts and combat reports which I had already used to determine relative aircraft performance. This with particular attention to the (very) murky area of turn rate... New information has put new light on two types: The P-47D Thunderbolt and the A6M5 Zero.

For the P-47D, I am more and more convinced the earlier Razorback version I choose to depict had, in real-life, a better sustained turn rate than the later Bubbletop P-47D, and this even with the needle-tip prop. This comes from noting the obvious crushing superiority in sustained horizontal turns that the earlier P-47D displays at ALL altitudes vs the Me-109G in late 1943 to early 1944. This is very consistent in hundreds of original pilot combat reports, and I more recently noted how this superiority was gradually disapearing in the later 1944 period, especially when compared to the largely unchanged FW-190A-8.

This was in the last year correlated by a Luftwaffe evaluation of an early, slightly underpowered, needle-tip P-47D Razorback that the Germans captured and tested, which report I had not seen before. Their conclusion?: An unqualified "The P-47D out-turns our Bf-109G". (Source: "On Special Missions". KG 200) This puts the early P-47D Razorback in the rough sustained turn area of a late Spitfire, or close to the FW-190A at low speeds (at least when turning to the left). Contrary to popular belief, the FW-190A, unlike the FW-190D, matched or usually slightly out-turned all Marks of Spitfires in prolonged sustained horizontal turns (more closely represented as Turn in the game, as opposed to unsustained turns: Slip in the game)...

I feel my Data Card, as depicted, is still very accurate for the later Bubbletop P-47D, but if you want to really depict an accurate earlier P-47D Razorback, I would recommend the following changes:

1-Reduce all Maneuver Speed (Green) Slip/Turn values by -1, using the Pink number only as a starting point.

2-On top of that, the -1 Turn value still applies, but now it is applied only to LEFT. (Result: Turn (NOT Slip) Maneuver Requirement to LEFT at 4.9: 1)

3-Use Orange Power Factors even with the Needle-tip prop (but no changes to the available Max. Climb Rates depending on prop).


The changes for the A6M5 Zero are due to a better understanding that Power Factors should reflect more the drag in turns than actual engine power:

1-Add +1 Power Factor (2 total at 4.9) if a Slip/Turn is made, this only up to 24.9.

2-Add +2 Power Factors (3 total at 4.9) if a Slip/Turn is made to LEFT, this only up to 14.9.

Otherwise the A6M5 could not sustain prolonged turns with US fighters despite a Slip/Turn requirement of 0... (I neglected extensively test-playing this type...)

Gaston

P.S.: I know there are US and UK tests of the early P-47D that are at odds with the above, but for reasons too long to explain here, I think a large number of combat reports is more reliable. In addition to this, the German tests mentioned sealed the case in my view... They knew their own Me-109G much better than the Allies did...

See over 600 P-47D combat reports here: http://www.wwiiaircraftperformance.org/p-47/p-47-encounter-r...

G.



 
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Gaston Marty
Canada
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I am bumping this in case it is of interest to Air Force fans not aware of my "Advanced" variant...

Happy Holidays...

Gaston
 
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J.L. Robert
United States
Sherman Oaks
California
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Maybe you should post this in the forums dedicated to Air Force?

Or at least in the Wargames subforums?
 
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