Power Venturi Tube, Single Throat, AN5805-1, Type A-3A F9F Cougar The case is in fine

The case is in fine shape for its age

uncages the compass card which would then rotate right or left

if the thick pointer was at 80

but it is there and shows the spec # and serial #)

This is a Cowl Flap Position Indicator for a 4 engine aircraft as used in the WWII-era US Navy Patrol Bomber PB2Y Coronado made by Consolidated

Power Venturi Tube, Single Throat, AN5805-1, Type A-3A F9F Cougar The case is in fineThis is a nice specimen of the Single Throat Power Venturi Tube used across US military aircraft of the US Army Air Corps Force and US Navy before, during, and post WWII. The US Army Air Corps fighter P 39 Airacobra is an example of an aircraft which used this venturi. The US Navy's TBM Avenger Torpedo Bomber also used this venturi, see illustration from its Erection and Maintenance manual dated 1945. Power venturi tubes provide a source of vacuum for