Power Venturi Tube, Single Throat, AN5805-1, Type A-3A F9F Cougar

Power Venturi Tube, Single Throat, AN5805-1, Type A-3A F9F CougarThis 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

On its face is embossed AC US ARMY

The case is in fine shape for its age

This is a Horsepower Indicator

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

showing a maximum altitude of 35

continues through the broadening tube and passes out at the tail end

uncages the compass card which would then rotate right or left

or it was sourced there

if the thick pointer was at 80

flight instruments

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

See the spec sheet in the photo gallery from the Index of Army Aeronautical equipment Volume 6 Instruments