Sperry Aircraft Gyropilot Model A-3 Instruction Manual 1940 Armée de l'Air A cool WWII-era aviation navigation

A cool WWII-era aviation navigation artifact indeed

and has a serial number prefix of AC42

thus putting the fixed lubber lines of the pelorus on this line

By loosening the small retaining lever

Gun Sight Aiming Point (GSAP) Cameras are electrically-operated motion picture cameras which were used across US Army Air Force and US Navy fighter and attack aircraft during WWII and the Korean War

Sperry Aircraft Gyropilot Model A-3 Instruction Manual 1940 Armée de l'Air A cool WWII-era aviation navigationThis is an authentic reference Sperry Aircraft Gyropilot Model A 3, Instructions No. 15 728A dated December 1940. The Gyropilot was an early automatic pilot system developed by Sperry which quickly became the standard system for private, commercial, and military aircraft of the day and during early WWII. This manual covers the 3rd generation of the Gyropilot: Model A 3, and its installation, operation, and maintenance. It is in reasonable condition