VicMel Thought provoking.
I find it hard to believe that a counter weight (without a vane) would stay exactly on 74.5 for minutes and not now be affected by vibration plus all of the other changes to flight dynamics. A fixed offset, sometimes tracking the R AoA value, sometimes not, looks to me like a software generated value.
I'm swinging between both extremes of scenario. However, that balance weight flopping near the end of ET's flight is hard to reconcile, even with Vic's logic.
That slight change of AoA at 05:41:22 - ish, is also troubling me. Why there? Why so consistent before and then after the change? i.e., if it can change at all, why would it remain steady either side of the change?