'Alternate' Stall Warning Systems
Ladies and Gentlemen,
I'm doing some research on alternate stall warning systems for my Experimental Methods in Aerodynamics class.
I read the Roselawn American Eagle ATR-72 accident report, and it mentioned that Goodrich (I think) had researched, flight tested, and patented a stall warning system that detected stall via pressure measurement on top of the wing at the ~70% chord location. The research and testing was primarily done in the early 90s.
Does anyone know if any airplanes actually use an SWS like this? Does anyone have any inkling as to why more airplanes do not use this system?
Thanks!