Basically "Corner Velocity" really means "The speed at which the plane has the best turn rate". This is the speed you want to try to maintain to maximize the turning ability of whatever plane you are flying. Above or below that speed, the time to turn 360 degrees will be greater.
Basically, we are talking about the speed that allows a particular plane to pull the highest G's in at the lowest speed. Planes that are "good turning" planes, will tend to have lower best turning speeds than the heavier BnZ oriented planes like the FW-A8. For example a Spit V has a best corner speed somewhere below 150 Mph, while the F4U-1D's best corner speed is around 220 Mph. If I'm in a turn fight flying either of these planes, I want to stay close to that speed to maximize my turn rate.
How to test this in a simple manner? Use your virtual pilot's G tolerance. Simply put, find the lowest speed the plane will induce the start of black-out in a horizontal sustained turn. You will have to angle the turn downwards somewhat to maintain a given turn speed while pulling G's. It's not the most scientific method, but it will give you a good idea of what speed range is best if you are in a turning battle flying a particular plane.
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Lephturn - Chief Trainer
A member of The Flying Pigs
Visit Lephturn's Aerodrome for AH news, resources, and training data.
http://users.andara.com/~sconrad/"MY P-47 is a pretty good ship
And she took a round coming 'cross the Channel last trip
I was thinking 'bout my baby and lettin' her rip
Always got me through so far
Well they can ship me all over this great big world
But I'll never find nothing like my North End girl
I'm taking her home with me one day, sir
Soon as we win this war"
- Steve Earl