Originally Posted by Coanda F. Eckt
Also an AoA will not be garanteed accurate. On jets the AoA sensor is usually not located on the wing, but on the fuselage ahead of the wing; the measure at this loaction will not be the same as true AoA for a number of reasons.
An AoA sensor "on the wing" isn't going to tell you "true AoA" at all... you're going to have spanwise differences, to start with, and wing bending/flexing, and the sensor will be in the upwash field too.
Also the AoA that is actually useful is the one that is measured relative to the fuselage reference - that's the one used for 99.9% of the analyses used in design and certification. While the fuselage side-mounted sensor will also not be a direct reading of this parameter (which is why test aircraft routinely use noseboom sensors) its a LOT easier to calibrate/correct since the flow conditions are more dependable - and we position the sensors in the location best suited to minimise the flow effects.