Retired F4
OK, I see how an AoA gauge works - it doesn't need any calibration to tell you what the AoA is; it's not until you want it to tell you how close you are to stall that calibration comes into play.
Now
AFAIK, you can't do that with any precision unless you know Mach number, since stall AoA is Mach dependent, so my question is how did your F4 AoA gauge work in a UAS situation?
BTW, I'm not trying to argue against fitting AoA gauges, just trying to establish their capabilities.