Plane / Planes / Aircraft / Aeroplane / Airplane appreciation

There's no trim on the SR71. Like mentioned earlier, it has various settings for the joystick that either shake it when near the maximum AOA as a warning and another that does the same but counters the movement to correct it.

I expect at Mach 3.x at 80,000 ft, it would either be on autopilot or on the setting that limits input to 7-8 degrees.

SR-71 trim mentioned here. Also, I'm happy to be corrected, but a 'setting' that limits AOA on an plane of that era sounds unlikely. As far as I'm aware such things didn't (couldn't, even) exist until they put a computer between the stick and the control surfaces.