Automatic Computing Sights, Types K-3, K-4, K-5 Handbook RCAF

Automatic Computing Sights, Types K-3, K-4, K-5 Handbook RCAFThis is an original WWII era Preliminary Handbook of Service and Maintenance Instructions for the Sperry K series turret mounted Gun Sight, K 3, K 4, and K 5, dated Jan 1942. The K series sights were found in US Army Air Force bombers such as the B 17 Flying Fortress and B 24 Liberator, and used to fire 50 caliber machine guns. This 30 page handbook includes text, tables, illustrations, and fold out diagrams. It is in reasonable condition given its

It is a very interesting instrument indeed

part number 139001-01-04

but without the bulbs

Acceleration Sensitive Rate of Climb / Vertical Speed Indicator

The purpose of the upright bracket is unknown

The glass and face markings are intact

The original face cushions have after 80+ years hardened with age

5 inches diameter and 6

Winter Jungingen Hohenz

Pipsqueak used an aircraft's voice radio set to periodically send out a 1 kHz tone which was picked up by ground-based high-frequency direction finding (HFDF

type AChS-1

This is a WWII-era Directional Gyro Fl22561 as used in bombers Dornier Do-17