min radius turn occurs at Va [Vp] It gives both the minimum speed required developing the aerodynamic load factors required for min radius turns and the maximum within the limits of strength
less than Va the limit load factors aren't available.... and the min radius can't be developed----aerodynamic limits
greater than Va, then CLmax and the and maximum load factors aren't available...structural limits
fooling with flaps is not too good because even though stall speeds are less, so are limit loads....watch it!
and tight turns in tight valleys with precipitous terrain--- unless your name is Patty Wagstaff or Mike Goulian
I could go on forever with math to prove this, but -----nah!