Sweet
Looks like I opened a bit of a can 'o worms here.
From my experience with fast jets (I do military T&E), there is a certain speed, aerodynamically-defined, where you can SUSTAIN a turn while turning in the smallest radius. For example, if a Spit is doing 350 kts and turns using max turn-rate performance, he will turn through a certain, aerodynamically-defined radius. If he is doing 80 kts and turns, again using max turn-rate performance, he will also turn through a certain radius, and that radius will be significantly different, likely significantly smaller, than that at 350 kts. But at 80kts, he will likely stall, and so therefore not be able to SUSTAIN his turn. However, at 350 kts (humour me and don't consider blackout as we are talking pure plane performance vice the carbon-based stick and rudder interface here), he will likely be able to sustain the turn. However, he will likely bleed E, getting slower, and so his turn will likely tighten (radius will decrease). Blackout would not likely be a problem at this speed. At what point, assuming a sustained turn at max performance is maintained, does the turn radius STOP decreasing, and he turn is sustained (E-neutral)? That point would be corner speed.
I realize it would be different for different configurations of any given aircraft, just as max speed and climb-rate is, but clearly there is a most efficient speed that a given aircraft turns at (I like the efficiency comment above). All I was wondering was is there a document in AH (great sim btw HT) that has this info. I suspect it would be a plot of speed vs altitude, similar to what is available for TAS and climb are.
