Automatic flight control system using rate gyros for unlimited maneuvering

Feedback control techniques have been applied to automatic flight control problems to produce a new type of automatic pilot. It provides unlimited maneuverability by using three simple nontumbling rate-type gyroscopes to regulate the angular velocity of the aircraft about its principal axes. The three basic control loops, without use of vacuum tubes, combine electric and hydraulic power boost means in proportional-type servomechanisms which actuate the aircraft's control surfaces.