Cover of "Elmer Carries On," a September 1944 U.S. Navy operating bulletin for the Sperry A-3 (MK 3) Gyropilot autopilot system. Illustrated with a cartoon mascot to engage pilots and mechanics, this publication exemplifies the Navy's wartime effort to standardize and simplify technical training for the advanced electromechanical flight instruments increasingly fitted to American combat aircraft. Project: 218077