On 19 Dec, 21:26, Marc Ramsey wrote:

An indicator for an AoA meter could consist of something as simple as
three LEDs, say a bright red one for approaching stall, green for
minimum sink, blue for best L/D and above, with the red LED blinking
faster as AoA gets closer to stall.

My glider does all sorts of things as it approaches stall. It gets
awful quiet. The stick starts shaking. The vario plummets. If I manage
to miss all these clear signs, why would a small flashing red light
grab my attention?

And can you imagine what would happen with a stall warning sounder?
Pilots used to flying with gear-down warnings would anxiously check he
undercarriage lever ... subconsciously pulling back to give themselves
a bit more time ...

Ian