Directional Gyro / Turn Indicator, Jack & Heintz AN-5735 Northrop rotating the pointer clockwise from

rotating the pointer clockwise from the 6 o'clock position

Here is an exceptional specimen of the Take-off and Landing Checklist Indicator as used on carrier-based

made by Simmonds Aerospace under the Pacitor brand name

See photo of the location of the instrument on the Flight Engineers upper instrument panel from the C-121 flight manual dated 1958

it was used to measure coolant temperature

Directional Gyro / Turn Indicator, Jack & Heintz AN-5735 Northrop rotating the pointer clockwise fromHere is a WWII era pneumatic Directional Gyro Turn Indicator made by Jack & Heintz. According to the Maintenance Interchangeability Cross Reference Charts of the Air Forces US Army, the AN 5735 Directional Gyro was used across nearly all aircraft of the US Army Air Force and US Navy during WWII. The knob rotates the course setting indicator, and once pulled out, uncages the compass card which would then rotate right or left. The knob and card are a