Originally Posted by Gaston444
The reason I am asking this is that some WWII pilots claim they achieved their fastest prolonged and continuous turn rates at much reduced power levels, way below maximum power, because they were sustaining much smaller, slower in speed but quicker in rate, horizontal circles over very, very long periods of consecutive maximum-rate sustained turning (up to 45 consecutive 360s non-stop at ground level).
Once upon a time, I flew an aircraft that you could start a low altitude continuous horizontal turn at 420 knots, pulling maximum g, and with maximum power, the thing would accelerate up toward Mach 1. Clearly to
sustain the maximum turn, you would have to use less than maximum power.
Isn't this the very effect you are wondering about?