Torque Pressure / BMEP Indicators, Dual Engines 1&2, 3&4, C-121 Lockheed Constellation Air Forces of USA The caging knob rotates but

The caging knob rotates but is not accurate in its caging of the gyro

I know of no other aircraft that used these fuel quantity gages (i

Made by General Electric

The part number has been confirmed in the B-17F Erection and Maintenance Manual dated 1942 and the G model dated 1944

The center knob adjusts the rate of change pointer

Torque Pressure / BMEP Indicators, Dual Engines 1&2, 3&4, C-121 Lockheed Constellation Air Forces of USA The caging knob rotates butThis is a matched set of dual engine Torque Pressure BMEP Indicators, one marked for engines 1 & 2, the other marked for engines 3 & 4, as used in the US Air Force C 121 transport version of the Lockheed Constellation. See photo of the location of the instruments on the Flight Engineers lower instrument panel from the C 121 flight manual dated 1958. One has a service date of 1973 stamped on its side. Both are in nice condition. The glass on the