Turn & Bank Indicator, AN5820-1 WWII US Army Air Force BT-13 thus allowing the needle to

thus allowing the needle to return to center

PDF copies of some of the A-12 manuals can be provided if desired

See photo of the cockpit of the F9F-5 from its flight manual dated 1955

000 feet per minute

via the pointer in the upper half of the display

Turn & Bank Indicator, AN5820-1 WWII US Army Air Force BT-13 thus allowing the needle toThe pneumatically operated, gyroscopic AN5820 1 Turn & Bank Indicator, Bendix part number 1721 2U A2, was used across all aircraft of the US Army Air Force during WWII, such as heavy bombers B 17 and B 24, medium bombers B 25 and B 26, as well as fighters P 38, P 39, P 40, P 47, and P 51, according to the US Army Air Force's Interchangeability Cross Reference Chart dated Feb 1945. In aircraft without a central vacuum filtration system, it would have