WW2 USAAF Aircraft Cockpit – SUCTION GAUGE – P-51 P-47 P-38 – NICE!

The AN 5771-5 Suction Gage was used across all aircraft of the US Army Air Corps, including bombers B-17, B-24, B-25, fighters P-38, P-40, P-47, P-51, and transport C-47. It measured the amount of vacuum generated to power the pneumatically-operated gyroscopic instruments, such as the Gyro Horizon (Flight Indicator), the Directional Gyro, and the Turn and Bank Indicator, as well as automatic pilot systems. The vacuum is generated by either a engine-powered vacuum pump or externally-mounted power venturi tube. A loss of suction could render these instruments inoperable or unreliable.

Made of plastic and aluminum, this Air Pressure Indicator is in GOOD used condition! Some slight marks and wear due to the age, but nothing that detracts. Retains MUCH of its original paint and finish, and is EASILY identifiable. Some flaking to the dial. A few part numbers at the back (AF-43; AN-5771-5), indicating is was manufactured in 1943. I have shown its location in the last photos. A VERY NICE item that would be an EXCELLENT addition to any collection, display, or restoration project!