I have been beating my head against the wall on this one for awhile. I have two thoughts:
A rotary position sensor and a vane. Has anyone built one? Or is there a commercial one out there?
More recently I have been looking at a laser doppler anemometer measuring wind velocity a few centimeters ahead of the wing in undisturbed air. I have been playing with a design using fiber optics and a diode laser. Is anyone familiar with this technology and what has been done or what is available?
Any other thoughts for an AoA?