>Do you know exactly how fly-by-wire Airbus planes are?
In normal operation it takes the input from the pilot and decides how to accomplish what it thinks the pilot wants. For example, if the pilot pulls all the way back the plane will translate that into the maximum safe climb rate. You can think of it as the pilot expressing a desired state and the plane figuring out how to get there.
>In an emergency, if the avionics computer goes crazy and starts making the plane do barrel rolls, can the pilot override it and take manual control?
AFAIK there's no way to disable the flight control. The computer is supposed to be reliable enough to not do crazy stuff and it accounts for sensor errors. Based on what sensors are malfunctioning different safety features are disabled. For example, if it can't get a reliable angle of attack reading the stall prevention is disabled.
In normal operation it takes the input from the pilot and decides how to accomplish what it thinks the pilot wants. For example, if the pilot pulls all the way back the plane will translate that into the maximum safe climb rate. You can think of it as the pilot expressing a desired state and the plane figuring out how to get there.
>In an emergency, if the avionics computer goes crazy and starts making the plane do barrel rolls, can the pilot override it and take manual control?
AFAIK there's no way to disable the flight control. The computer is supposed to be reliable enough to not do crazy stuff and it accounts for sensor errors. Based on what sensors are malfunctioning different safety features are disabled. For example, if it can't get a reliable angle of attack reading the stall prevention is disabled.