AoA vane Mig-23

[Bevo]

Timothy Quinn
I have two images here which clearly show what seems a conventional bronze type movable vane mounted on the horizontal plane.

Yes you are correct – looks like a yaw vane. I have never seen one on any for the MiG-23/27 aircraft I was familiar with. No idea what its use would be unless Brian is correct and it is part of some experimental flight control system. Given the departure characteristics in the MiG-23/27 series it would not seem that it would feed a cockpit instrument since during moderate/heavy maneuvering flight, by the time you see the beta angle increase the aircraft would probably have already departed. I wonder if this is a test aircraft.