Flight Command Indicator ID-524/ARR-39A for SAGE System F-89 The black left lever engaged

The black left lever engaged or disengaged the Sperry Gyropilot

This is a Horsepower Indicator

Heading Index

The K-series sights were found in US Army Air Force bombers such as the B-17 Flying Fortress and B-24 Liberator

When the compass pointer is centered within the course indicating pointers

Flight Command Indicator ID-524/ARR-39A for SAGE System F-89 The black left lever engagedThe ID 524 Flight Command Indicator was a panel mounted component of the AN ARR 39A Fire Control Data Link System, connecting to the ground breaking system known as SAGE Semi Automated Ground Environment. The AN ARR 39A system was installed in F 86D's Sabrejet Fighters along with an extensive electronics package in the late 1950's, becoming the F 86L Sabre Interceptor aircraft of the US Air Force. SAGE, an innovation developed by MIT, was the US's