Suction Gage, AN 5771-5, US Army Air Force WWII C-47

Suction Gage, AN 5771-5, US Army Air Force WWII C-47This is a WWII era Suction Gage, AN 5771 5, made by Collens. This indicator has a serial number prefix "AF 43", evidence of a manufacturing year 1943. The AN 5771 5 Suction Gage was used across all aircraft of the US Army Air Corps, including bombers B 17, B 24, B 25, fighters P 38, P 40, P 47, P 51, and transport C 47. The Suction Gage measured the amount of vacuum generated to power the pneumatically operated gyroscopic instruments, such as the Gyro

It has a service label from the US Air Force Tinker Air Base's OCAMA (Oklahoma City Air Materiel Area)

base plate

was found in Tunisia in a wine cellar operating as an instrument repair shop

Unfortunately

At almost 200 pages

The knob would rotate the face of the dial while the pointer remains fixed to set the present field elevation

the difference between the totals is the difference in density of the two fuel types

Both are labeled "AF US ARMY" on their faces

It is a hand held finder used to ascertain the range of an enemy aircraft based upon its known wingspan

Its face has embossed "BU AERO USN" i

was the premier heading reference system for high-latitude flying in North America throughout the early nineteen fifties

very similar to AS-27A of the ARN-5 system used in bomber and transport aircraft of the US Army Air Force