Valve, Air Vacuum Regulating AN5828-2, US Navy R88-V-85X Instruments OH-6 Cayuse See spec sheets in the

See spec sheets in the photo gallery

000 ft of altitude

Here is an Anti-Icing Indicator as used on the early 1950's US Air Force C-119 Fairchild Flying Boxcar transport

and fuel pressure measured via opposed bellow

The GSAP camera

Valve, Air Vacuum Regulating AN5828-2, US Navy R88-V-85X Instruments OH-6 Cayuse See spec sheets in theThis is a WWII era pneumatic Valve, Air Vacuum Regulating, made by Schwien, part number 2550, as used in aircraft of the US Army Air Force and US Navy. This valve was used to regulate the vacuum pressure between its source (either an externally mounted venturi tube, or an internal engine driven compressor) and the system of pneumatically powered flight instruments, such as the Gyro Horizon, Directional Gyro, and the Turn & Bank Indicators. Accuracy of