Ed wrote:
Hopefully someone isn't flying the bottom of a loop near stall
speed. Isn't the minimum radius turn going to be accomplished at
corner velocity and max-G pull?

Yes, turn rate (or time in the pull) is also a factor and max turn rate
and min turn radius are maximized if married with max available radial g
at corner. You should actually throttle up if you're behind corner!!!!

Question: how does one compute or determine cornering velocity for a
specific aircraft? Must that be done through flight testing, or is there a
mathmatical relationship to the stall speed/etc?


Do a Google search for 14cfr23.335.pdf

Specifically, does anyone know the cornering V for a Decathlon 160-CS?

With the above, you can calculate it for max gross weight.
For low speed aircraft I think it is just Va.
Look in the aircraft manual, it should have a V-n diagram.