Originally Posted by
LowObservable
That's what I call "pseudo-triplex". I don't think the international authorities are buying it.
https://www.isasi.org/Documents/libr...ducing-787.pdf
SEE Pages 39 to 42
787 Synthetic Airspeed
Introducing the 787 - Effect on Major Investigations - And Interesting Tidbits
Tom Dodt Chief Engineer – Air Safety Investigation ISASI September, 2011
+++
I would think a simple inertial compare re pitch angle ( eg floor angle ) and horizontal flight path would give an reasonably approximate AOA via a totally internal system- at least accurate enough to identify out of range or false compares of two external AOAS sensors.
After all- Boeing must use a similar internal - inertial compare to their military orbital spaceplane which stays up for a year or more and then lands automatically. Reentry no doubt does not alllow external vane type sensors , etc.