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So, the aircraft weight plays a important role in a 45 degree dive.
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Yes it does as does the lower drag of the FW-190.
If you use Take Off Weights, the equilibrium speed of the FW-190 is higher than the P47.
It does not matter though as neither aircraft can achieve equilibrium velocity as they are dynamic pressure and mach limited.
The P47 always has higher limits.
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Blackberry, the reason i posted the charts i did, is because the weights you are using appear to be off.
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Yes his weights are off and it makes a big difference. Thanks for catching that.
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but your not going to be diving much at sea level me thinks!
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No but don't think of it as sea level. It is EAS when we use sea level performance. Adjust it for density effects and it becomes actual performance.
As such it is good approximation of Indicated Airspeeds and delivers a very good prediction of the performance trends you should see.