My current aeroplane has one of these. it is the "vane" type, which you can test on the ground (with the power on) by moving it backwards, and the buzzer duly sounds. No power, no buzzer.
My question is this. What happens if you have a complete power failure ? I know all about stall buffet, but .... Is this not a serious design flaw ? My last plane had a simple but highly effective "pressure activated" system which required no power ...
FF
