The builder of my 320 designed and built-in a stall warning device.

It consists of a raised section of upper surface skin on the left wing (about 5 mm), and around 30 mm wide, aerodynamically shaped.

The increasing AOA producing some increase in pressure on the upper surface causes contacts to make and an aural stall warning comes in about 15 knots above the demonstrated clean power off stall.

It’s simple and it works.

Cheers

Dom Crain

VH-CZJ