Wizofoz said:
for the T = 0 case, best rate of climb is minimum rate of descent and reduces to maximum -D*v/L, which is equivalent minimum power required. This is unrelated to stall speed, though it's possible in some cases that it might occur very close to stall.
Dick W said:
The lowest is Vmp, where the minimum power is needed to keep the aircraft flying. This is not Vs. It is a little bit above Vs, where it is difficult to fly, as you are on the wrong side of the drag curve.
Hmmm... I think that's what I said at first, before confusing myself with all the terms: mininimum sink speed in a glider is just above stall speed, and less than the speed for best glide angle.
I also found the graph I was looking for, and it is indeed the Cl vs AOA graph, which is often used to describe the stall AOA (or airspeed in unaccelerated flight), that I had in mind. So where I said "max lift" earlier, I did really mean max Cl.