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However, that is "terminal speed difference", not dive acceleration difference.
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I don't think I was clear.
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The aerodynamic forces will tell you the FW-190A can outdive the P47. Just look at the sea level speeds and power required. At sea level, EAS = TAS and EAS is the speed the airplane always feels.
The P47 generates ~272 THP more than the FW-190A8 to travel ~20mph slower. It takes a lot of power to push that big heavy P47 through the air.
However, the relationship of thrust and drag is not the primary limiting factor in a dive for these airplanes. Dynamic pressure limits and mach limits tend to set the speed limits in WWII fighters.
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The FW-190 has a higher terminal velocity than the P47. It developes almost as much power but has lower drag production.
Niether aircraft though is limited by the relationship of thrust and drag. Dynamic pressure limits and mach limits set the boundary.
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In the example of P47 vs Fw190G, the P47 did three steps to overtake Fw190.
1) to get better dive acceleration
And after some time,
2) to get a higher speed
And after some time,
3) to over take fw190G
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This is not necessarily due to any aerodynamic limitations, Blackberry. There were human being operating these airplanes for the test in question.
Some operational realities of these two aircraft:
1. The FW-190 pilot closes the cooling gills, which are closed anyway for level flight, ensures the propeller is in automatic, which it is for normal operation unless the KG is operating in emergency mode, pushes the nose forward and dives. His engine is automatic and adjust's as required for actual conditions under air load. The supercharger system responds instantly to power changes. In short, he pushes the stick forward and goes....
2. The P47 pilot does not have a automatic system. He has to trim the aircraft tail heavy, reduce his manifold pressure, reduce rpm to 2600, close cowl flaps, and then dive. He has a throttle he must baby because of the turbocharger. A turbocharger does not respond instantly to power changes and the P47 is much more restricted in its use. Reducing it too fast and he can lose pressure in the system which will take him ~30 seconds of level flight to get back. He cannot dive until he reduces it. In short, he cannot just push the stick forward and go......