Oil Quantity Indicator, 4 Tank Selector, Liquidometer, EA-48-16 B-29 Italian the drift angle is determined

the drift angle is determined by reading the location of the pointer on the base's scale

See photo of the location of the instruments on the Flight Engineers lower instrument panel from the C-121 flight manual dated 1958

I have also confirmed its use in the P-2E by its parts manual dated 1966

made by Electric Auto-Lite

This is a Magnesyn-type Manifold Pressure Indicator for a dual engine aircraft

Oil Quantity Indicator, 4 Tank Selector, Liquidometer, EA-48-16 B-29 Italian the drift angle is determinedNormal 0 false false false MicrosoftInternetExplorer4 This is an authentic vintage quad tank Oil Quantity Indicator made by Liquidometer, PN EA 48 16, as used in the US Army Air Force's Boeing B 29 Superfortress (see photo of B 29 Flight Engineer's instrument panel with a red dot showing instrument location). The knob situated below the display rotates to oil reservoir 1 thru 4 (see photo of display partially rotated), indicating the quantity of oil