> Gyros worked back in 1911. why not use one to back up the failed sensor? An angle of attack sensor measures something a gyroscope cannot measure: the angle o

> Gyros worked back in 1911. why not use one to back up the failed sensor? An angle of attack sensor measures something a gyroscope cannot measure: the angle of the plane relative to the wind. The amount of lift produced by the wings depends on this angle.