Originally Posted by
Adlerdriver
Lots of assumptions in play there. However, if you're going to say that, then wouldn't you have to include level flight as well?
Either one of those assumes the wing has an angle of incidence of zero in relation to the longitudinal axis (pitch reference) of the aircraft.
If the wing was mounted on the fuselage with a positive 2 degree angle of incidence, when it rotated to 5 degrees of pitch on takeoff roll, AOA would be 7.
All true, yes assuming zero angle of incidence since that's not a variable on a given airplane (OK there were I think some carrier-based airplanes that could actually adjust that).
The TO roll is the only time you know for certain that pitch = AoA (or AoA - AoI if applicable). In flight you can make some reasonable assumptions in certain phases, but those AF447 guys obviously had a huge delta between what they thought pitch was telling them about AoA, and what AoA was really doing.