PJ2
Thank you for your reply. I modified my previous posting a bit with additional information regarding the BackUp Speed Scale option, and a bit more info on an A-310 accident on takeoff which occurred in Africa following bogus stall warning activation.
The reference to airspeed derived AOA validation was only a comment on a possible engineering approach which should not be done. AOA and airspeed are each primary data, and they may conflict for various reasons. This is just the engineer in me coming out and I apologize if it causes confusion.
The AOA indication can also be an effective forewarning of a potential bogus stall warning after liftoff. If it is pegged at high AOA while going down the runway, something is wrong with the sensor, and you will know that before rotation, probably even before V1. Airspeed and AOA go together to tell you important data about your aircraft's performance and enable you to cross check each indication. When something doesn't agree between them it can be a serious problem and you need to have an idea which to believe in. If all you have on your panel is airspeed, you are open for an AOA sucker punch (IMHO), particularly on a high wing loading aircraft.
Machinbird