Why still no dive acceleration difference?

[Crumpp]

P47D which has better dive acceleration.

This is wrong. You are confusing terminal velocity with aceleration.

At Vmax:

FW190

9418lbs * sin 45 = 6660lbs excess thrust

a = F/m

m = 9418lbs/32.2 = 292 lb-s^2/ft

a = 6660lbs/292lb-s^2/ft

a = 22.8 ft/s^2 for the Focke Wulf

P47D22:

13500lbs * sin 45 = 9546lbs

a = F/m

m = 13500lbs/32.2 = 419 lb-s^2/ft

a= 9546lb/419lb-s^2/ft

a = 22.78 ft/s^2 for the P47D22

That is the best case scenario for the P47D22.

If we dive from say, 260 KEAS, then we see 25.35 ft/s^2 from the FW190 and 24.4ft/s^2 from the P47.

The FW190 has a .95ft/s^2 advantage in aceleration rate.