I was wondering why this system uses 2 differential sensors. I read the DOT/FAA/TC-18/7 study and they seem to indicate that one sensor was all that was needed.
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I need to read the study, but why not just one differential sensor for Pitot - AOA and one for q (Pitot - Static)? In the picture of the hardware board the Pitot and the AOA sensors are both referenced to static, and then a third (gauge) to measure static.
Finn
Hi Marc,
In that study, there were three sensors, one was static pressure and two measured "Pfwd" and "P45." Dave et al concluded that the third static sensor was not necessary. We are currently using the same configuration normalizing using local pressure, in accordance with the study you reference. We do use the static sensor to compute AOA, but that is used for deriving airspeed and some other information in the data stream.
Vac