Electronic Control System of the C-1 Auto Pilot Part 1: Basic Electricity as Applied to Electronic Control System 1943
Animated training film depicting the fundamentals of electricity and how electrical signals can be used to keep an airplane on correct course and altitude through an autopilot.

Theory of the C-1 Autopilot, Part 1: Basic Principles 1943    star_border 7
Animated training film demonstrating the process by which an autopilot uses gyroscopic controls to maintain an airplane in level flight.