Gyrosyn Compass C-2A Sperry Master Indicator 653894-6B C-119 Boxcar USAF P-2 Neptune The US Navy Anchor logo

The US Navy Anchor logo is stamped on the back and on the face is embossed "BU AERO US NAVY" (Bureau of Aeronautics)

Here is a WW2-vintage electrical Free Air Temperature Indicator

There is no noticeable swing or waver

now currently the aircraft is in the US and reported as airworthy as of the date of this entry

Also note the photo of the fuel tank locations in a B-36H with their capacities in gallons (note that the gages indicate fuel in pounds

Gyrosyn Compass C-2A Sperry Master Indicator 653894-6B C-119 Boxcar USAF P-2 Neptune The US Navy Anchor logoThis is a Gyrosyn Compass Master Indicator Type C 2A made by Sperry part number 653894 6B. The Master Indicator was part of a 5 module system combining the functions of a directional indicator and a magnetic compass, introduced in the late 1940's. See the diagram of the system with an explation of its function in the photo gallery, including a diagram of this specific indicator. An illustration of its position on an instrument panel is in the photos