I posted the following to the CT forum. I simply cut and pasted it here for reference:
Some guys were debating the merits of the P-47s on another forum. I was not surprised that the entire discussion revolved around sea level performance. What most players don't fully understand is that the MAs are an aberration of real WWII combat.
P-47s were designed for high altitude combat. Above 30,000 feet, they were as good or better than any other type to see service. Up that high they were in their element and extremely formidable.
Later models, such as the P-47M and P-47N were without peer, with the exception of a handful of Ta 152H fighters, which didn't show any advantage until above 40,000 feet.
For example, at 40,000 feet, the P-47N can attain 455 mph.
At 30,000 feet and above, the P-47s are superb. The P-47N is faster at 40k than the Bf 109K-4 is at its best altitude, which is just 22k. It's important to remember that at high altitude, maneuverability is almost totally dependent upon reserve horsepower. Up there, your indicated airspeed is the one thing you must watch carefully. For example, at 32,000 feet, the Fw 190A-8 can barely do 210 mph IAS. That's not very fast and the 190A series were not good performers up that high. However, it is vital to understand that when turning at just 2g, the 190A-8 will stall at 170 mph IAS.
Think about that; max speed and stall speed are separated by just 40 mph IAS. There's little margin for error when flying the 190A-8 up high. In contrast, the P-47D can attain 260 mph IAS at 32k, giving it a huge advantage in maneuverability as it has the power to turn at 4g and not lose altitude or risk a stall and subsequent spin. You should also note that the P-47Ds climb much faster than the 190s at 25k and above. Indeed, the P-47D-40 climbs as fast as the 109K-4 at 25k, and better at 30k.
I encourage anyone who intends to fly Combat Tour should start practicing high alt combat now. Load the TA map for offline play. Fly from one of the two 30k bases (launch on the NE runway, as the others spawn as air starts at various locations). Climb out and attack the drones. You will find this very challenging to accomplish. Thus, you will experience that high alt combat is very different from furballing down low.
Below is actual measured performance data for the P-47s, defining both low and high altitude performance.
All planes were tested with 25% fuel, zero burn. Each armed with 8 guns, but the standard ammo load of 267 rounds per gun (as actually used for most WWII missions), not the max load. This is what I fly with 90% of the time. I'm hoping that HTC uses the standard load and avoids the extra weight. I do not believe more than that will be required in Combat Tour.
Acceleration, 150 mph to 200 mph at 100 feet ASL. Measured in seconds.
P-47D-11: 11.09
P-47D-25: 10.83
P-47D-40: 10.12
P-47N: 10.44
Acceleration, 150 mph to 300 mph at 100 feet ASL. Measured in seconds.
Drag is a bigger factor in this test.
P-47D-11: 54.84
P-47D-25: 55.27
P-47D-40: 51.66
P-47N: 45.68
Acceleration, 200 mph IAS (280 TAS) to 250 mph IAS (342 TAS) at 20,000 feet ASL. Measured in seconds.
P-47D-11: 40.12
P-47D-25: 39.25
P-47D-40: 37.09
P-47N: 30.73
Max speed at sea level, MIL power.
P-47D-11: 335 mph
P-47D-25: 332 mph
P-47D-40: 333 mph
P-47N: 329 mph
Max speed at sea level, Combat Power (WEP).
P-47D-11: 345 mph
P-47D-25: 343 mph
P-47D-40: 344 mph
P-47N: 367 mph
Max speed at 10,000 feet., Combat Power (WEP).
P-47D-11: 377 mph
P-47D-25: 375 mph
P-47D-40: 376 mph
P-47N: 400 mph
Max speed at 25,000 feet., Combat Power (WEP).
P-47D-11: 431 mph
P-47D-25: 429 mph
P-47D-40: 432 mph
P-47N: 457 mph
Max speed at 30,000 feet., Combat Power (WEP).
P-47D-11: 436 mph
P-47D-25: 434 mph
P-47D-40: 438 mph
P-47N: 476 mph
Time to climb to 10,000 feet, beginning at 150 mph, measured in minutes:seconds.hundredths of seconds.
P-47D-11: 3:07.02
P-47D-25: 2:57.40
P-47D-40: 2:44.10
P-47N: 2:50.06
My regards,
Widewing