Turn and Bank Indicator Type A-11, AN5820-1 Air Force US Army, WWII, B-17, P-51, P-38 F-80 and 1 3/4" deep mounted

and 1 3/4" deep mounted in a black

A totalizing indicator displayed the total fuel available in all of the fuel tanks within the aircraft (usually without including any supplemental tanks e

also very similar to the ones of the N-3

representing the direction and distance the air has moved during the elapsed time

An excellent overview of the system can be read at the Duxford Radio Society website

Turn and Bank Indicator Type A-11, AN5820-1 Air Force US Army, WWII, B-17, P-51, P-38 F-80 and 1 3/4" deep mountedThis Turn & Bank Indicator Army Type A 11, AN5820 1, made by Bendix Part No. 1722 2V A2, was used across virtually all aircraft of the US Army Air Force during WWII, including bombers B 17, B 24, B 25, B 26, fighters, P 38, P 39, P 40, P 47, P 51, and transports C 46 and C 47. Imprinted on the face, but barely discernible in the photos, is "AF US Army", and its serial number prefix is AF 42, indicates the manufacturing year 1942. This unit has the