Suction Gage, AN 5771-5, US Army Air Force WWII Luftwaffe used to indicate the supercharger

used to indicate the supercharger power being delivered to the engine when demanded

Ammeter RF 0-3 Amps

and Fw190D thru Ta152

with the small "V" pointed toward the front of the airplane

Suction Gage, AN 5771-5, US Army Air Force WWII Luftwaffe used to indicate the superchargerThis is a fine example of an WWII era Suction Gage, AN 5771 5, made by US Gauge, part number AW 1 7 8 21 AK. 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