Originally posted by Evan
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You don't need AoA to get good-enough airspeed data. For many decades the airspeed indicator was just a mechanical differential pressure manometer calibrated in a fancy and fake speed scale (remember that the indicated airspeed is not a speed). And in may planes it still is. Sure, you can use AoA to super-fine-tune the airspeed. But look at the plots of airspeed left and right of the Lion Air crash and see how much (read how little) they differ, when the AoA had a difference of 20 (TWENTY) degrees!!!! +/- 5 or 10 knots of airspeed (out of 150 knots) will not have a big influence in the reverse-engineered AoA computation.
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