Sperry Aircraft Gyropilot Operation and Installation Manual 1936
This is an authentic reference Instructions for Operation and Installation of the Sperry Aircraft Gyropilot, Instructions No. 15-726A dated November 1936. 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.
It is in exceptional (i.e., very good) condition for its age. The cover is a thick index card stock which covers 55 pages, all in good condition. Measures 8.5 inches by 11 inches.