Sperry Aircraft Gyropilot Model A-3 Instruction Manual 1940 Armée de l'Air MsoNormalTable {mso-style-name:"Table Normal"

MsoNormalTable {mso-style-name:"Table Normal"

This is a WWII-era Aircraft Navigational Protractor (aka Aircraft Plotter) Kit as used in navigator-crewed aircraft of the US Army and Navy

and has a serial number prefix of AC42

A cool WWII-era aviation navigation artifact indeed

Sperry Aircraft Gyropilot Model A-3 Instruction Manual 1940 Armée de l'Air MsoNormalTable {mso-style-name:"Table Normal"This 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